Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| kinetics of phagocytosis of chlamydia psittaci by mouse fibroblasts (l cells): separation of the attachment and ingestion stages. | the kinetics of phagocytosis of chlamydia psittaci (6bc) by monolayers of mouse fibroblasts (l cells) was studied with an assay that distinguished between the attachment and ingestion phases of phagocytosis. at multiplicities of 10 and 100 50% infectious doses (id50) per l cell, virtually all of the inoculated c. psittaci had been attached and ingested after 60 min at 37 degrees c. at multiplicities of 500 to 5,000 id50 per l cell, the initial rates of attachment and ingestion of c. psittaci to ... | 1978 | 631892 |
| loss of inorganic ions from host cells infected with chlamydia psittaci. | mouse fibroblasts (l cells) infected with the 6bc strain of chlamydia psittaci released potassium ion (k(+)) into the extracellular milieu in a way that depended on size of inoculum and time after infection. when the multiplicity of infection was 500 to 1,000 50% infectious units (id(50)) per l cell, loss of intracellular k(+) was first apparent 4 to 10 h after infection and was nearly complete at 6 to 20 h. magnesium ion and inorganic phosphate (p(i)) were also released. similar multiplicities ... | 1978 | 640730 |
| surface projections and internal structure of chlamydia psittaci. | the outermost surface of the small infectious forms of chlamydia psittaci contain geometrically arranged spikes distributed over approximately 50% of the bacterial surface. the spikes are located opposite the concave side of an electron-dense crescent-shaped chlamydial core. | 1978 | 641015 |
| experimentally induced feline chlamydial infection (feline pneumonitis). | cats exposed to aerosols of feline chlamydia psittaci developed a disease characterized principally by conjunctivitis. signs of conjunctivitis appeared between postexposure days (ped) 5 and 10, were often unilateral initially, and persisted for 22 to 45 days. fever followed the onset of conjunctivitis (ped 11 to 15) and persisted for 3 to 8 days. signs of mild rhinitis (occasional sneezing and mild serous nasal discharge) occurred in some cats between ped 8 and 37. neither signs of lower respira ... | 1978 | 646190 |
| immune adherence hemagglutination: alternative to complement-fixation serology. | immune adherence hemagglutination (iaha) was compared to complement fixation (cf), using standard procedures, for serological testing of human sera with a number of commercially available antigens. the antigens included herpes simplex, measles, cytomegalo-, and influenza (type b) viruses, as well as mycoplasma pneumoniae and chlamydia psittaci (chlamydia group). the iaha test was found to be as specific as the cf test, but 4 to 20 times as sensitive with all antigens tested. antigen titers were ... | 1978 | 649762 |
| the isolation of a chlamydia psittaci-like agent from a free-living african buffalo (syncerus caffer). | 1978 | 676013 | |
| mechanisms of infertility in genital tract infections due to chlamydia psittaci transmitted through contaminated semen. | ten heifers inseminated with semen artificially contaminated with chlamydia psittaci were not pregnant 40 days later, whereas five of 10 control heifers inseminated with the same semen mixed with control diluent became pregnant. normal embryos were recovered two and one-half or three days after insemination of another group of animals with semen containing c. psittaci, a finding indicating that fertilization failure was not responsible for the infertility. uterine biopsy samples taken from two h ... | 1978 | 681792 |
| [human chlamydia psittaci infection]. | 1978 | 705936 | |
| isolation of chlamydia psittaci from a patient with interstitial keratitis and uveitis associated with otological and cardiovascular lesions. | a case history of a 15-year-old schoolgirl with fluctuating bilateral uveitis, bilateral stromal keratitis with vascularisation, and bilateral deafness associated with tinnitus and balance disturbance is described. three years from the onset of her clinical signs she died of a sudden cardiac arrest caused by endocarditis associated with valvular and arterial lesions. chlamydia psittaci was isolated from her conjunctiva. in her blood type-specific antichlamydial antibody at a level of 1/64 agains ... | 1978 | 708673 |
| chlamydia psittaci infection in danish cattle. | intestinal tract infection by chlamydia psittaci was demonstrated in one cattle herd by isolation from faecal specimens, using embryonated eggs. such infections were observed in all animals younger than 12 months, in 60% of the heifers and in none of the adult cows. the presence of infection correlated (r=0.511) with the serum titre of compliment fixation antibodies against chlamydial antigen. young calves, which were spontaneously infected with chlamydia postnatally, developed ileitis and moder ... | 1978 | 716920 |
| response of c3h/hej and c3h/hen mice and their peritoneal macrophages to the toxicity of chlamydia psittaci elementary bodies. | intravenous injection of toxic doses of chlamydia psittaci elementary bodies into endotoxin-responsive c3h/hen mice or endotoxin-nonresponsive c3h/hej mice resulted in essentially identical time intervals to death. inoculation of monolayer cultures of thioglycolate-stimulated peritoneal macrophages from the two strains of mice with 250 elementary bodies per macrophage resulted in immediate host cell toxicity, although the c3h/hej macrophages were somewhat less sensitive to elementary body toxici ... | 1978 | 730377 |
| use of enteric vaccines in protection against chlamydial infections of the genital tract and the eye of guinea pigs. | guinea pigs in a test group were fed living guinea pig inclusion conjunctivitis (gpic) organisms classified as chlamydia psittaci in 60% yolk-sac suspensions as enteric vaccines, while animals in a control group received uninfected yolk sac. seven test animals and 14 control animals were challenged 11 or 22 days later with 1,000 50% infectious doses of gpic organisms in either the conjunctiva or the vagina. evidence of protection from mucosal infection in both sites was noted in test animals. cl ... | 1978 | 739153 |
| chlamydia shedding by four species of wild birds. | four wild bird species--great-tailed grackle (cassidix mexicanus), common grackle (quiscalus quiscula), brown-headed cowbird (molothrus ater), and mourning dove (zenaidura macroura)--were either inoculated intratracheally with chlamydia psittaci or exposed indirectly as uninoculated cagemates. shedding of chlamydiae was monitored by inoculating mice with suspensions of material eluted from cloacal swabs collected from all birds, usually at 3-day intervals. sporadic shedding of chlamydiae was dem ... | 1978 | 749892 |
| parasite-specified phagocytosis of chlamydia psittaci and chlamydia trachomatis by l and hela cells. | phagocytosis of the 6bc strain of chlamydia psittaci and the lymphogranuloma venereum 440l strain of chlamydia trachomatis by l cells and hela 229 cells occurred at rates and to extents that were 10 to 100 times greater than those observed for the phagocytosis of escherichia coli and polystyrene latex spheres. both species of chlamydia were efficiently taken up by host cells of a type they had not previously encountered. phagocytosis of chlamydiae was brought about by the interaction of parasite ... | 1978 | 344217 |
| legionnaires' disease: antigenic peculiarities, strain differences, and antibiotic sensitivities of the agent. | paired sera from victims of legionnaires' disease showed, in many cases, significant rises in immunoglobulin g antibodies to both the causative agent (la) of legionnaires' disease and chlamydia psittaci, but concurrent rises in immunoglobulin m antibodies only against la. guinea pigs experimentally infected with la likewise responded with antibodies to both c. psittaci and la. guinea pigs infected with la also reflected significant differences in antigenic makeup and in pathogenicity among four ... | 1978 | 355583 |
| sensitivity of immunoperoxidase and immunofluorescence staining for detecting chlamydia in conjunctival scrapings and in cell culture. | the sensitivities of giemsa, immunofluorescence, and immunoperoxidase staining for the detection of chlamydia psittaci inclusions in conjunctival scrapings and in irradiated mccoy cell monolayers were compared. conjunctival specimens were obtained from a cat colony in which a trachoma-like disease, feline chlamydial keratoconjunctivitis, was endemic. the two immunochemical techniques were found to be of equal sensitivity and 50% to 100% more sensitive than giemsa stain. permanent preparations of ... | 1978 | 368085 |
| kinetics of the complement fixing and immunofluorescent antibody response in experimental chlamydiosis in ewes. | normal, 70 days pregnant ewes were inoculated i.v. with a chicken embryo grown chlamydia psittaci strain. the ewes presented a biphasic febrile curve and aborted 30 to 68 days after inoculation. chlamydiae were isolated from aborted fetuses and from vaginal swabs. ewes developed cf and if antibodies titrating 1:320 to 1:1024 two to three weeks after inoculation. a second antibody rise occurred one to two weeks before or after abortion and reached titers of 1:640 to 1:1024. immunoglobulin fractio ... | 1978 | 373577 |
| [isolation and identification of clamydia psittaci as the pathogen in enzootic abortion of sheep in eastern slovakia]. | abortions in ewes occurred on a large scale in three localities in eastern slovakia. antibodies to the group-type ornithosis antigen were detected in titres of 1 : 128 to 1 : 2048 in the aborting ewes in the mentioned localities. suspensions were prepared from the four samples of material, obtained either from the placentae and afterbirths of the aborting ewes or from the tissues of the aborted foetuses. seven-day old yolk sacs of chicken embryos were infected with these suspensions. four strain ... | 1978 | 99861 |
| comparison of direct and modified direct complement-fixation and agar-gel precipitin methods in detecting chlamydial antibody in wild birds. | detection of chlamydial antibody in serums of wild birds was compared for the following methods: direct complement-fixation (dcf), modified dcf (mdcf), and agar-gel precipitin (agp). the birds species used were great-tailed grackles (cassidix mexicanus), common grackles (quiscalus quiscula), brown-headed cowbirds (molothrus ater), bronzed cowbirds (tangavius aeneus), and mourning doves (zenaida macroura). the birds were either inoculated with an isolate of chlamydia psittaci obtained originally ... | 1978 | 100098 |
| isolation of chlamydia psittaci from avian sources using growth in cell culture. | a method is described for the isolation of chlamydia psittaci using cell culture treated with 5-iodo-2-deoxyuridine, and subsequent identification by direct fluorescent antibody staining. the method was applied to 110 sets of tissues from a variety of avian specimens submitted for diagnosis. chlamydiae were isolated and identified in 24 specimens: 13 from parrots, 7 from turkeys and 4 from pigeons. | 1978 | 18770373 |
| growth and effect of chlamydiae in human and bovine oviduct organ cultures. | 1979 | 223717 | |
| fulminant psittacosis. | two patients died of psittacosis after presenting with generalised toxaemia, acute renal failure, and evidence of pancreatitis. death was attributed to the virulence of the chlamydial strain and the delay in antemortem diagnosis. in one case chlamydia psittaci was isolated from necropsy lung tissue. a third case of psittacosis suggested person-to-person or fomite spread, which is rarely reported. infection was acquired from an apparently healthy, imported and quarantined cockatiel. import restri ... | 1979 | 85004 |
| direct immunofluorescence tests with counterstains for detection of chlamydia psittaci in infected avian tissues. | different methods of preparation and serological evaluation of rabbit globulins for use in fluorescent antibody conjugate and different methods of counterstaining with fluorescent antibody tests were evaluated for detection of chlamydia psittaci in infected turkey tissues. the agar gel precipitin reaction was that chosen for testing and selecting antiserums to be used for fluorescein isothiocyanate conjugation. the fluorescent antibody staining was most pronounced with conjugate made from globul ... | 1979 | 91417 |
| chlamydia psittaci: growth characteristics and enumeration of serotypes 1 and 2 in cultured cells. | the growth characteristics of chlamydia psittaci serotypes 1 and 2 (ovine and bovine origin) were studed in mouse l cells. formation of inclusions and yield of infectious progeny for serotype 1 were maximal when host cells were treated with cycloheximide and the ph in the cell culture medium was 7.2-7.4. the number of cells that contained inclusions and the infectivity yield for serotype 2 were maximal when the ph was 6.6-7.0. treatments with diethylaminoethyl dextran and cycloheximide increased ... | 1979 | 94339 |
| target tissues associated with genital infection of female guinea pigs by the chlamydial agent of guinea pig inclusion conjunctivitis. | female guinea pigs were experimentally infected in the genital tract with the strain of chlamydia psittaci that causes guinea pig inclusion conjunctivitis. chlamydiae were found frequently in superficial squamous epithelial cells of the exocervix, along with heavy involvement at the squamocolumnar junction. in this zone chlamydiae were observed in columnar cells, but inflammation and chlamydial inclusions were not observed in true endocervical epithelium. these observations were supported by res ... | 1979 | 374637 |
| prevalence of certain antibodies to selected disease-causing agents in wild turkeys in texas. | in texas in 1976 and 1977, rio grande turkeys (meleagris gallopavo intermedia) from seven counties and eastern turkeys (m. g. silvestris) from one county were tested for antibodies to selected poultry pathogens. standardized serological tests disclosed reactors to salmonella pullorum (2.4%), s. typhimurium (2.3%), and mycoplasma gallisepticum (4.8%). there were no reactors to newcastle disease virus or chlamydia psittaci. prevalence of m. gallisepticum antibody in wild turkeys was significantly ... | 1979 | 384989 |
| diagnostic specificity of immunoglobulin m (igm) response in differentiation legionnaires' disease from psittacosis. | specific igm and igg antibody responses to legionella pneumophila (ldb) and chlamydia psittaci (psi) in serum specimens from 22 cases of legionnaires' disease (ld) were examined by micro-immunofluorescence (if) tests to explore the diagnostic significance of the igm antibody response. serial samples from 5 patients with ld showed greater than or equal to 4-fold changes in igg antibody against ldb and psi. all 5 patients possessed igm antibodies against ldb but not against psi. in single convales ... | 1979 | 394307 |
| isolation of chlamydia psittaci ovis in sheep thyroid cell culture. | 1979 | 433110 | |
| arrays of hemispheric surface projections on chlamydia psittaci and chlamydia trachomatis observed by scanning electron microscopy. | scanning microscopy of two strains of chlamydia psittaci and four strains of chlamydia trachomatis representative of the wide diversity in origin and behavior of members of the genus revealed patches of regular arrays of hemispheric projections on the surfaces of elementary bodies of all six strains. these distinctive and perhaps unique surface structure are probably present in all populations of chlamydiae. | 1979 | 438131 |
| biotyping of chlamydia psittaci based on inclusion morphology and response to diethylaminoethyl-dextran and cycloheximide. | strains of chlamydia psittaci from cattle, sheep, pigs, mice, guinea pigs, rabbits, cats, and parrots were subdivided based on their biological characteristics. chlamydiae grown in the yolk sac of chicken embryos were used to infect l cell monolayers. the host cells were infected without further treatment or treated with diethylaminoethyl-dextran, cycloheximide, or both. the following criteria were used for biotyping the strains: the morphology of the inclusions and time after infection at which ... | 1979 | 457272 |
| interaction of chlamydia psittaci reticulate bodies with mouse peritoneal macrophages. | noninfectious reticulate bodies of chlamydia psittaci are readily phagocytized by thioglycolate-elicited mouse peritoneal macrophages in monolayer culture. the internalized reticulate bodies are rapidly destroyed as indicated by a 60 to 70% decrease in trichloroacetic acid-precipitable radioisotopic counts in the macrophage pellet by 10 h and a concomitant increase of the trichloroacetic acid-soluble radiolabeled chlamydial nucleic acid in the cytoplasm. this intracellular destruction of reticul ... | 1979 | 468374 |
| changes in the ultrastructure of chlamydia psittaci produced by treatment of the host cell with deae-dextran and cycloheximide. | 1979 | 469985 | |
| stimulation of peroxidase by chlamydial infection: cytochemistry of guinea pig conjunctival epithelium. | guinea pig inclusion conjunctivitis, a naturally occurring chlamydial disease of guinea pigs, resolves spontaneously after 3 to 4 weeks. the factors responsible for curbing the infection have not yet been specifically defined. since iwata (invest. ophthalmol. 15:297-301, 1976) reported cytochemical activity for peroxidase in the conjunctival epithelium of the normal rat, we undertook these studies to determine whether a similar activity exists in the guinea pig, and if so, whether it functions i ... | 1979 | 478644 |
| cytochalasin b does not inhibit ingestion of chlamydia psittaci by mouse fibroblasts (l cells) and mouse peritoneal macrophages. | cytochalasin b did not inhibit ingestion of chlamydia psittaci by either mouse fibroblasts (l cells) or mouse peritoneal macrophages in concentrations that produced distinctive morphological changes and inhibited phagocytosis of polystyrene latex beads and escherichia coli k-12. | 1979 | 478646 |
| use of hela cell guanine nucleotides by chlamydia psittaci. | exogenous guanine was found to be incorporated into the nucleic acids of chlamydia psittaci when the parasite was grown in hela cells containing hypoxanthine guanine phosphoribosyltransferase (ec 2.4.2.8) activity but not when the parasite was grown in transferase-deficient hela cells. no evidence for a chlamydia-specific transferase activity was found in either transferase-containing or transferase-deficient infected hela cells. it is concluded that c. psittaci is incapable of metabolizing guan ... | 1979 | 478649 |
| wheat germ agglutinin blockage of chlamydial attachment sites: antagonism by n-acetyl-d-glucosamine. | addition of 2 to 10 micrograms of wheat germ agglutinin (wga), a lectin from triticum vulgaris specific for n-acetyl-d-glucosamine, per ml to suspensions of mouse fibroblasts (l cells) blocked the attachment of 14c-labeled chlamydia psittaci 6bc to the l-cell surface. wga and strain 6bc competed for similar sites on l cells, but once bound, one was not replaced by the other. n-acetyl-d-glucosamine, but not other monosaccharides of related structure, antagonized the blocking action of wga. lectin ... | 1979 | 500195 |
| infective endocarditis with glomerulonephritis associated with cat chlamydia (c. psittaci) infection. | a patient with glomerulonephritis and endocarditis is described who had evidence of feline chlamydia psittaci infection. treatment with antichlamydial drugs resulted in resolution of the glomerulonephritis and the endocarditis. it is recommended that screening for chlamydia is included in the investigation of patients with suspected or obscure endocarditis. | 1979 | 508458 |
| isolation of a chlamydial agent from rocky mountain bighorn sheep. | a total of 53 clinical specimens from both healthy and diseased rocky mountain bighorn sheep (ovis canadensis) were examined for chlamydia. an agent consistently lethal for chicken embryos was recovered from a nasal swab taken from a normal ewe. this agent, designated bhs-15, possesses antigens which fix complement in the presence of anti-chlamydial serum, is susceptible to chlortetracycline, and is resistant to sodium sulfadiazine and streptomycin. attempts to culture the isolate in quality con ... | 1979 | 522218 |
| experimental pneumonia in red deer (cervus elaphus l) produced by an ovine chlamydia. | an isolate of chlamydia psittaci from ovine pneumonia produced extensive pneumonia in red deer after endobronchial inoculation. associated clinical signs lasting for several days included pyrexia, inappetance, increased pulse and respiration rate, and physical distress after handling, but no coughing or upper respiratory symptoms. histologically, an acute exudative reaction was present after two days, and an early proliferative response after seven days. both the clinical and pathological respon ... | 1979 | 532073 |
| experimental transmission of chlamydia psittaci to turkeys from wild birds. | wild birds were inoculated with chlamydia psittaci to determine species that could be potential hosts and vectors in transmitting the agent to domestic turkeys. infection occurred in turkeys exposed to starlings (sturnus vulgaris), common grackles (quiscalus quiscula), brown-headed cowbirds (molothrus ater), and inca doves (cardafella inca). mourning doves (zenaidura macroura) shed the agent sparingly, but turkeys exposed to them did not become infected, these findings and knowledge of the habit ... | 1979 | 546413 |
| [the replication cycle of chlamydia trachomatis and chlamydia psittaci: ultrastructural analysis]. | an ultrastructural comparative analysis is reported on the replication cycle of six strains of chlamydia trachomatis, recently isolated, and chlamydia psittaci strain 6bc, grown in cell cultures. important morphological distinctions of the bacterial walls are documented. in chlamydia trachomatis the cell wall seems more rigid. this causes, during the morphogenesis of the elementary body, its separation from the cell membrane with formation of an electron transparent space, which is not demonstra ... | 1979 | 553521 |
| [antibodies against chlamydia trachomatis in patients with non-gonococcal urethritis and in the healthy italian population]. | the authors report the results of a study on the prevalence of serum antibodies against chlamydia trachomatis among patients with non-gonococcal urethritis caused by chlamydia trachomatis and diagnosed on the basis of the isolation of the microorganism in cell cultures, among patients with non-gonococcal urethritis of unknown etiology and in groups of healthy population, in italy. the search for antibodies was performed both with complement-fixation tests in micro-titer system, using an antigen ... | 1979 | 553522 |
| serological cross-reactions of lipid a components of lipopolysaccharides isolated from chlamydia psittaci and coxiella burnetii. | 1980 | 6107040 | |
| chlamydia psittaci: inclusion vacuole ultrastructure. | the inclusion ultrastructure of fibroblasts infected with chlamydia psittaci (6bc) was studied. electron microscopic techniques were used which permitted the observation of whole infected host cells and 1.0-micron sectioned preparations. it was shown that the cytoplasmic inclusion vacuoles of infected cells contained interconnecting structures within which chlamydiae reproduce. | 1980 | 6250694 |
| [main respiratory virus and chlamydia psittaci antibody survey by passive hemagglutination on bovine serum from togo]. | 1980 | 6256826 | |
| persistent infection of mouse fibroblasts (l cells) with chlamydia psittaci: evidence for a cryptic chlamydial form. | when monolayers of mouse fibroblasts (l cells) were infected with enough chlamydia psittaci (strain 6bc) to destroy most of the host cells, 1 in every 10(5) to 10(6) originally infected cells gave rise to a colony of l cells persistently infected with strain 6bc. in these populations, the density of l cells and 6bc fluctuated periodically and reciprocally as periods of host cell increase were followed by periods of parasite multiplication. successive cycles of l-cell and 6bc reproduction were su ... | 1980 | 6262243 |
| a comparison of the efficacy of a live and four inactivated vaccine preparations for the protection of cats against experimental challenge with chlamydia psittaci. | a commercial live feline-chlamydial vaccine and four experimental inactivated preparations were compared on the basis of clinical protection in cats challenged conjunctivally and intranasally with chlamydia psittaci. best protection was afforded by the live vaccine. good results were also obtained using inactivated preparations of a recent feline conjunctival isolate. protection did not correlate with the development of complement fixing antibodies but may be related to the induction of a cell m ... | 1980 | 6448682 |
| infectivity of penicillin-induced chlamydia psittaci forms for cell cultures from the chorioallantoic membrane of chick embryos. | l-cells were infected at high multiplicity with meningopneumonitis organsims (mp) and incubated in medium with penicillin (200 units/ml) and without the drug. at intervals up to 36 hours cells were removed and l-cell associated chlamydial infectivity was determined for cell cultures from the chorioallantoic membrane (cam) of chick embryos which were treated before inoculation with diethylaminoethyl (deae)-dextran. in control l-cells, the infectivity decreased at 8 hours and reached it lowest lev ... | 1980 | 6999778 |
| surface properties of chlamydia psittaci. | the surface properties of elementary bodies of chlamydia psittaci were investigated by diethylaminoethyl-sephadex chromatography, cytophoresis, partitioning in an aqueous polymer two-phase system, and hydrophobic interaction chromatography of the organism. the surface of c. psittaci was found to be hydrophobic and negatively charged at ph 7 and to have an isoelectric point of about ph 5. reagents which block free carboxyl groups altered the surface charge of c. psittaci and caused the organism t ... | 1980 | 7053063 |
| inapparent chlamydial infection in the urogenital tract of guinea-pigs. | microbiologically inapparent urogenital infection appeared to be induced in male guinea-pigs inoculated intra-urethrally with low doses of the guinea-pig inclusion conjunctivitis strain (gp-ic) of chlamydia psittaci. this state was indicated by the ability of inoculated animals to donate eye infection to normal animals caged with them. donors failed to develop overt urogenital infection throughout the period of transmission judged by both absence of infected cells in urethral scrapings and failu ... | 1980 | 7229613 |
| modifications of the envelope of chlamydia psittaci during its developmental cycle: freeze-fracture study of complementary replicas. | examination of complementary replicas obtained by freeze-fracture of chlamydia psittaci revealed, at the level of the plasma membrane, a progressive differentiation of "crate-like formations," which likely correspond to transmembranal pores. recognition of "early" and "late" stages observed in the intermediate bodies permitted detailed study of the developmental cycle of this chlamydia. | 1980 | 7364718 |
| [human chlamydial infections (author's transl)]. | due either to chlamydia psittaci or to chlamydia trachomatis, chlamydial infections are transmitted to man directly or indirectly via birds or mammals. directly transmitted chlamydial infections may be located in the eye (trachoma, inclusion body conjunctivitis), the urogenital tract (above all urethritis but other sites are possible) or in the ent or respiratory systems (giving rise in particular to atypical pneumonias). reiter's syndrome (urethritis, conjunctivitis, polyarthritis, enterocoliti ... | 1980 | 7383904 |
| fatal pulmonary psittacosis and aspergillosis. case report of dual infection. | a 59-year-old man in previously good health had acute, progressive bronchopneumonia and died after a three-week course of illness, despite treatment with various antibiotics. serologic, microbiologic, and histologic findings indicated infection with both chlamydia psittaci and aspergillus fumigatus. disseminated, invasive aspergillosis sometimes is a complication of chronic respiratory disease, malignancy, or other deficiency of host defenses, but to our knowledge, this is the first report of ps ... | 1980 | 7396594 |
| a survey of the conjunctival flora of clinically normal cats and cats with conjunctivitis. | conjunctival swabs obtained from 39 cats with conjunctivitis and from 50 cats with clinically normal conjunctivae were cultured for bacteria, mycoplasmas, viruses and chlamydiae. non hemolytic streptococci and staphylococcus epidermidis were isolated from both groups, but b hemolytic streptococci, rhinotracheitis (feline herpes i) virus, mycoplasma felis and chlamydia psittaci were recovered only from cases of conjunctivitis. the isolation rate of microorganisms was low; only two of 50 normal an ... | 1980 | 7427854 |
| prevalence of antichlamydial antibody in london blood donors. | the prevalence of type-specific antichlamydial antibody in a population of blood donors in london was studied using a microimmunofluorescence test. twenty-six (17%) of 150 women and 38 (26%) of 150 men had antichlamydial antibody (igg at greater than or equal to 1/16 or igm greater than or equal to 1/8 or both). of these, five (3%) women had one (0.75%) man had this antibody directed against chlamydia trachomatis serotypes d-k, responsible for genital infections, and one man had antibody to chla ... | 1980 | 7448582 |
| clinical evaluation of immunity following experimental or natural infection of ewes with chlamydia psittaci (var. ovis). | the immunity conferred by a primary infection either experimental or natural was challenged at 70 days of pregnancy by intradermal inoculation of 8 x 10(7) virulent yolk sac propagated chlamydiae. the experimental primary infection was carried out, 19 months before at 70 days of pregnancy by intravenous inoculation (pi ewes). the natural primary infection was obtained 14 months before the challenge when the ewes (pcc ewes) were placed in contact with experimentally infected ewes. the response to ... | 1980 | 7458247 |
| experimental chlamydial salpingitis in the guinea pig. | acute self-limited salpingitis developed when guinea pigs' fallopian tubes were infected with the guinea pig inclusion conjunctivitis agent (chlamydia psittaci). the disease peaked at approximately 8 days post infection and had diminished markedly by day 14. the inflammatory reaction was concentrated at the luminal surface. chlamydial replication was demonstrated and inclusions were found in epithelial cells. | 1980 | 7468681 |
| chlamydia psittaci infection in lines of mice with high or low antibody responses. | biozzi's high (h) and low (l) antibody producer mice were i.v. infected with a suspension containing 10(4)/ml viable c. psittaci organisms. h mice humoral anti-chlamydia response was much higher than that of l mice. l mice natural resistance to infection with live chlamydia was higher than that of h mice. since the two lines exhibit inverse differences in b-cell and macrophage functions, but they are quite similar with regard to t-cell-mediated immunity, it would appear that macrophages play a m ... | 1980 | 7469387 |
| [isolation of chlamydia psittaci from bull ejaculate]. | during the repeated serological examination (rvk) in five breeding bulls the positive levels of antibodies to chlamydia psittaci in titre 1 : 128 were found. in the isolation experiments the pelleted ejaculates deposited in liquid nitrogen were used. the isolation of chlamydia psittaci on yolk sacs of chicken embryos was positive in two breeding bulls. the isolated strains are labelled gn-33 and ok-107. the serological examination of blood samples was in all five breeding bulls negative on bruce ... | 1980 | 6777949 |
| [epidemiology and diagnosis of legionella infections in austria (author's transl)]. | out of 2,105 patients with atypical pneumonia and febrile infections 15 cases of legionellosis were diagnosed by the indirect immunofluorescent antibody test (ifa) in austria from the middle of 1977 to the end of 1979. among the patients with the diagnosis of atypical pneumonia legionnaires' disease was found in 0.65%. among those patients whose sera were examined because of suspected legionella infection the frequency was 1.96% (p less than 0.1). therefore it may assumed that some symptoms of l ... | 1981 | 6791407 |
| interaction of chlamydiae with host cells and mucous surfaces. | for chlamydiae, as obligate intracellular parasites, attachment to and ingestion by host cells are essential steps in reproduction. their attachment site appears to be heat-sensitive; it has not been correlated with any morphological entity. antibody blocks chlamydial attachment to cells and, for certain chlamydia psittaci and chlamydia trachomatis strains which are highly infective for cell cultures, n-acetylglucosamine appears to contribute to cell receptor specificity. sialic acid residues ha ... | 1981 | 6911075 |
| serological differentiation of legionnaires' disease and mycoplasma pneumoniae and chlamydia psittaci pneumonia. | 1981 | 7185948 | |
| identification of a major envelope protein in chlamydia spp. | a major cell envelope protein of chlamydia psittaci with a molecular weight of approximately 43,000 was identified and partially characterized. it was present at all stages of the c. psittaci developmental cycle. a major protein with a similar molecular weight was also observed in two chlamydia trachomatis strains. | 1981 | 7217005 |
| evaluation of progesterone, estrogens and placental lactogen in pregnant ewes following experimental infection with an abortive agent chlamydia psittaci "var-ovis". | the plasma levels of progesterone, free and conjugated estrone and of placental lactogen have been determined in three groups of pregnant ewes inoculated with an abortive agent (chlamydia psittacci var. ovis) on day 66 of gestation. in the control group, ewes were immunized against this abortive agent, and lambed after a normal duration of pregnancy; the blood levels of the three studied hormones showed normal patterns. in the two other groups, the ewes which were not immunized, had a shortened ... | 1981 | 16725643 |
| [legionnaires' disease. first observations in catalonia (author's transl)]. | the authors report the first two cases of legionnaires' disease from catalonia. both patients were chronic bronchitic males, and the cases were sporadic. the onset of the disease was characterized by a febrile illness with muscle and joint pains, respiratory symptoms (cough and mucous sputum production), and mental changes. there were no digestive complaints. pulmonary consolidation occurred in both patients in the left upper lobe. blood chemistries disclosed the existence of an absolute lymphop ... | 1981 | 7253729 |
| [chlamydia psittaci infections (psittacosis)]. | 1981 | 7253739 | |
| serological observations on chlamydia psittaci infection in finnish dairy herds. | 1981 | 7258022 | |
| bovine mastitis induced by a common intestinal chlamydia psittaci strain. a pathogenetic and serological investigation. | 1981 | 7258034 | |
| ocular and dermal delayed hypersensitivity reactions in guinea-pigs following infection with guinea-pig inclusion conjunctivitis agent (chlamydia psittaci). | guinea-pigs which had been sensitized to guinea-pig inclusion conjunctivitis agent by ocular infection, were given ocular and dermal challenges with a range of doses of agent. ocular delayed-type hypersensitivity responses were elicited by a wide range of doses. such responses were associated with the presence of chlamydial inclusions and inflammatory cells. the eid50 for ocular reinfection was only slightly higher than that for primary ocular infection. dermal delayed-type hypersensitivity reac ... | 1981 | 7261478 |
| [inapparent persistent chlamydial infection in mccoy cells]. | we have studied the phenomena of inapparent chlamydial infections in vitro using mccoy cells in culture as hosts and low doses of chlamydia psittaci (gp-ic) as infecting agents. the results indicate that gp-ic can persist undetected at least 220 hrs in mccoy cells previously inoculated with 0.2 ml of a gp-ic preparation containing 30 ifu/ml, using the centrifuge-assisted inoculation technique. these cells were maintained in complete mem medium supplemented with 2% v/v of foetal bovin serum (fbs) ... | 1981 | 7280303 |
| [comparative studies of buffalo green monkey (bgm) cells and mice for the isolation of chlamydia psittaci from avian droppings and organ samples]. | 1981 | 7293558 | |
| attachment defect in mouse fibroblasts (l cells) persistently infected with chlamydia psittaci. | almost all the cells in populations of mouse fibroblasts (l cells) persistently infected with the 6bc strain of chlamydia psittaci were immune to superinfection with high multiplicities of c. psittaci, whether or not the l cells contained visible chlamydial inclusions. as ascertained by experiments with 14c-labeled c. psittaci, immunity to superinfection resulted from the failure of added chlamydiae to attach to persistently infected host cells. however, when exogenous c. psittaci was introduced ... | 1981 | 7298188 |
| the incidence of chlamydia psittaci antibodies in patients with respiratory tract diseases. | the incidence of chlamydia psittaci infections in hamburg has been studied using the complement fixation test on 655 human sera collected from patients with respiratory tract diseases. of the 653 sera investigated, 78 (11.9%) showed antibody titers between 1:8 and 1:128. of the positive sera, 21 (16.9%) presented values of greater than or equal to 1:32. this infection is encountered more often in individuals over 21 years of age (15.9% to 23.4%) than in persons under 20 (0.8% to 6.0%). general p ... | 1981 | 7298201 |
| localization of chlamydial group antigen in mccoy cell monolayers infected with chlamydia trachomatis or chlamydia psittaci. | chlamydial inclusions were demonstrated by indirect immunofluorescence (if) with antiserum to the chlamydial group antigen when mccoy cell monolayers infected with either chlamydia trachomatis or chlamydia psittaci were fixed in formaldehyde or paraformaldehyde, provided the monolayer was not allowed to dry. if these monolayers were then air dried and restained by if with the same antiserum but with a different fluorescence conjugate, group antigen associated with inclusion-containing mccoy cell ... | 1981 | 7309240 |
| attachment of chlamydia psittaci to formaldehyde-fixed and unfixed l cells. | the attachment of chlamydia psittaci, strain 6bc, to formaldehyde-fixed and unfixed l cells was studied. cations were found to be required for attachment to both fixed and unfixed cells. the requirement for cations was largely eliminated when the net negative surface charge on fixed cells was reduced. a high concentration of sodium chloride (0.5 m) prevented binding and removed chlamydiae which were attached to fixed and unfixed cells, whereas non-ionic detergents had no effect on attachment of ... | 1981 | 7320701 |
| infection of lambs by orally administered ovine abortion strain of chlamydia psittaci. | 1981 | 7336547 | |
| keratoconjunctivitis of the koala, phascolarctos cinereus, caused by chlamydia psittaci. | chlamydia psittaci was cultured from 29 of 35 koalas (phascolarctos cinereus) with keratoconjunctivitis. the disease progressed from acute to chronic stages over some months, with a known duration of at least 2 years. one recovered carrier was found. up to 29% of koalas in some populations were clinically affected. a seasonal spread of infection was indicated by the high percentage of acutely affected cases found in summer. there was no evidence of susceptibility being related to age or sex. the ... | 1981 | 7338971 |
| isolation of chlamydia psittaci from imported psittacine birds in japan. | 1981 | 7339143 | |
| isolation of chlamydia psittaci from cats with conjunctivitis. | chlamydia psittaci was repeatedly demonstrated in stained smears of conjunctival scrapings from a group of cats in a single household and in 5 instances the organism was isolated by yolk sac inoculation of 6-day-old pathogen free, embryonated hen eggs. thirteen of 15 cats in the cattery developed conjunctivitis at various times over a 9-month period. the outstanding features of the disease were its severity, chronicity and refractoriness to treatment. prolonged (2 week) treatment with tetracycli ... | 1981 | 7342937 |
| cell-mediated and humoral immune responses to chlamydial antigens in guinea pigs infected ocularly with the agent of guinea pig inclusion conjunctivitis. | cell-mediated immune response and humoral response to chlamydial antigens were investigated in guinea pigs infected with the agent of guinea pig inclusion conjunctivitis (gpic). pronounced cell-mediated immune response to the homologous antigen, as well as to two other chlamydial antigens, 6bc (chlamydia psittaci) and lb-1 (c. trachomatis), occurred in all infected animals. cell-mediated immune response to gpic, and to a lesser extent to 6bc and lb-1 as well, was enhanced with time after infecti ... | 1981 | 7012031 |
| inhibition of phagolysosome fusion is localized to chlamydia psittaci-laden vacuoles. | intracellular survival of chlamydia psittaci is in part dependent on the ability of the organism to thwart phagolysosome formation. circumvention of phagolysosome fusion could be either localized to chlamydia-laden vacuoles or generalized to all phagosomes in the host cell. to determine which of these modes is in operation the ability of chlamydia elementary and reticulate bodies to protect saccharomyces cerevisiae from degradation in macrophage phagolysosomes was examined via acridine orange an ... | 1981 | 7019080 |
| a modified isolation technique for chlamydia psittaci in l-cells treated with cycloheximide and glucocorticoid. | various auxiliary treatments of l-cells employed for the isolation and cultivation of c. psittaci were investigated in order to develop an improved method for the detection of the agent, in addition to the aid obtained by centrifugation and cycloheximide treatment. glucocorticoid treatment increased the observed number of inclusions considerably through a preservative effect on host cells and enhanced an spontaneous re-infection. besides, the hormone made the scanning of cell culture for inclusi ... | 1981 | 7020334 |
| [serotyping of "chlamydia psittaci" by microimmunofluorescence test (author's transl)]. | antisera from inbred mice (c57bl and c3h) improve the specificity of the microimmunofluorescence test. we used this method in the serotyping of 6 strains of chlamydia psittaci of differing origin. inspite of relatively marked cross-reactions it was possible to distinguish 3 groups: - the first group consisted of 2 strains of avian origin and the lgv strain 33l, - the second group consisted of 2 strains responsible for enzootic abortion in ewes, - in the third group, only 1 strain was found and t ... | 1981 | 7020525 |
| serum and tear antibodies to chlamydia after reinfection with guinea pig inclusion conjunctivitis agent. | repeated inoculation of th eyes of guinea pigs with the naturally occurring chlamydia psittaci agent, guinea pig inclusion conjunctivitis (gpic), showed that animals gradually become susceptible to reinfection with the passage of time after primary infection. higher levels of serum igg antibody had a significant association with resistance to challenge inoculation only with a high dose (250 eld50) but not with a low dose (25 eld50) inoculum. with each inoculum, however, some animals with high se ... | 1981 | 7031009 |
| the isolation of salmonellae, newcastle disease virus and other infectious agents from quarantined imported birds in canada. | necropsy and culture results are presented for 269 consignments of imported birds (mainly psittacine and passerine species) examined between january 1977 and august 1980. consignments were submitted for diagnosis of clinical illness or deaths occurring among these birds while they were in quarantine before entry into canada. enteritis and injury were the most frequent diagnoses. pathogens or potential pathogens were isolated from 77% of consignments. newcastle disease virus was isolated nine tim ... | 1981 | 7039785 |
| [newer diagnostic procedures for chlamydial diseases (author's transl)]. | chlamydiales are bacteries showing a growth cycle unique among procaryotes. the two species chlamydia trachomatis and chlamydia psittaci are genetically very distant and their pathogenicity for man is very distinct. human chlamydial infections by chlamydia trachomatis are diseases chiefly sexually transmitted and their epidemiological importance is growing. the relationship between chlamydial infections, reiter disease, and cat scratch disease are discussed. the various laboratory diagnostic pro ... | 1981 | 7041060 |
| viral and mycoplasmal antibodies in patients with myocardial infarction. | the suggestion that infection might provoke myocardial infarction prompted a controlled study among 49 patients with myocardial infarction for antibody titres to 22 viruses, and to mycoplasma pneumoniae and chlamydia psittaci. the frequency of significant rises in antibody titres was similar in patients with myocardial infarction, 7 (14%) out of 49, and in control patients, 8 (22%) out of 37. thus, in our limited series we could not confirm the hypothesis that viral or mycoplasmal infection are ... | 1981 | 6814338 |
| isolation and electron microscopic observations of intracytoplasmic inclusions containing chlamydia psittaci. | intracytoplasmic inclusions containing chlamydia psittaci were isolated by a newly established method. infected l-cells at 20 h after infection were suspended in 0.25 m sucrose-tris(hydroxymethyl)aminomethane buffer containing ethylene-diaminetetraacetic acid, homogenized in a dounce tissue grinder, and filtered through a 2,000-mesh screen. isolated inclusions were stabilized in 5% bovine serum albumin in 10 mm tris(hydroxymethyl)aminomethane buffer. electron microscopic observations revealed th ... | 1981 | 6257643 |
| a rapid method for staining inclusions of chlamydia psittaci and chlamydia trachomatis. | a new staining method was developed for the detection of inclusions of chlamydia psittaci and chlamydia trachomatis inclusions in cell cultures. using a combination of methyl green and neutral red stains and washing at ph 5.0, inclusions were stained red while cell cytoplasm was pale pink and cell nuclei were pale green. the method was significantly better than giemsa staining and comparable to immunofluorescence for detecting c psittaci inclusions. its sensitivity for detection c trachomatis in ... | 1982 | 6177720 |
| adenine nucleotide and lysine transport in chlamydia psittaci. | isolated reticulate bodies of chlamydia psittaci were found to transport atp and adp by an atp-adp exchange mechanism. atp uptake activity was not detected in elementary bodies. the apparent km of transport for both atp and adp was approximately 5 microm, and the calculated vmax for both was about 1 nmol of nucleotide transported per min per mg of protein. adp competitively inhibited atp transport with a ki of 4.5 microm. other nucleotides tested had no effect on the uptake of atp. a magnesium-d ... | 1982 | 6279566 |
| [newer diagnostic procedures for chlamydial diseases (author's transl)]. | chlamydiales are bacteries showing a growth cycle unique among procaryotes. the two species chlamydia trachomatis and chlamydia psittaci are genetically very distant and their pathogenicity for man is very distinct. human chlamydia infections by chlamydia trachomatis are diseases chiefly sexually transmitted and their epidemiological importance is growing. the relationship between chlamydial infections, reiter disease, and cat scratch disease are discussed. the various laboratory diagnostic proc ... | 1982 | 6287622 |
| lymphokine-mediated microbistatic mechanisms restrict chlamydia psittaci growth in macrophages. | the obligate intracellular procaryote chlamydia psittaci replicated in cultures of macrophages taken from the peritoneal cavities of unstimulated or thioglycollate-elicited a/j mice. when treated with supernatant fluids (lymphokines) from c. psittaci-immune mice spleen cells that were stimulated for 24 hr in vitro by the mitogen concanavalin a, resident macrophages supplemented with heart infusion broth (8 mg/ml) and elicited macrophages markedly suppressed intracellular chlamydial development. ... | 1982 | 7054284 |
| modulation of the host immune response as a result of chlamydia psittaci infection. | after intraperitoneal injection of mice with infectious, inactivated, or envelope preparations of the elementary body of chlamydia psittaci, lymphocyte transformation of spleen cells to the mitogens concanavalin a, phytohemagglutinin, and lipopolysaccharide was significantly reduced 1 and 2 weeks postinjection. lymphocyte response returned to the control values by 4 weeks. similarly, transformation of cells by chlamydial antigen was not detected until 4 weeks postinjection. injection of the noni ... | 1982 | 7056575 |
| electron microscopic observations of surface projections on chlamydia psittaci reticulate bodies. | electron microscopic observations were carried out to confirm the presence of surface projections on chlamydia psittaci reticulate bodies (rbs). the morphology of the projections on rbs was identical with that on elementary bodies (ebs); one end of each projection was connected with the cytoplasmic membrane, but the other end of the projection protruded beyond the cell wall through a fine hole or rosette in the cell wall. the results demonstrated that the rosettes seen in rb cell walls were morp ... | 1982 | 7061397 |
| chlamydia psittaci isolated from the eyes of domestic ducks (anas platyrhynchos) with conjunctivitis and rhinitis. | 1982 | 7064325 | |
| chlamydia psittaci induced pneumonia in a horse. | an agent lethal to embryonated chicken eggs was isolated from lung tissues of a quarter horse mare with a fatal respiratory disease. the lesions induced in embryonated chicken eggs, the tinctoral properties, the ultrastructural morphology, the resistance of the organism to sodium sulfadiazine, and the presence of a chlamydial complement fixing antigen, identify this isolate as a member of the family chlamydiaceae and suggest the agent to be chlamydia psittaci. two shetland ponies experimentally ... | 1982 | 7067460 |
| viral respiratory infections in asthmatic children staying in a mountain resort. | in 32 mainly atopic children (aged 9-16 years) staying in a mountain resort the effects of viral infections on the course of asthma were studied. daily surveillance was made of respiratory infection symptoms and clinical parameters for asthma, including forced expiratory volume in 1s (fev1). serology for several respiratory viruses. mycoplasma pneumoniae and chlamydia psittaci was done. in 58 symptomatic respiratory infections (sri) 39 asthmatic exacerbations occurred (67%). eighteen sris of vir ... | 1982 | 7067764 |
| cytotoxic cells induced after chlamydia psittaci infection in mice. | the ability of spleen cells from chlamydia psittaci-infected mice to lyse c. psittaci-infected and uninfected target cell monolayers was studied. the cytotoxicity assay used was a terminal label method in which the number of adherent target cells surviving the interaction with effector cells was determined by measuring the uptake of [3h]uridine by such cells. it was observed that in the first few days postinfection (3 to 5), spleens contained cells that lysed infected and uninfected targets with ... | 1982 | 7068208 |
| association between resistance to superinfection and patterns of surface protein labeling in mouse fibroblasts (l cells) persistently infected with chlamydia psittaci. | when mouse fibroblasts (l cells) were persistently infected with chlamydia psittaci strain 6bc, they became immune to superinfection because they no longer associated with exogenous c. psittaci in a way that led to ingestion and intracellular multiplication. at the same time, the persistently infected l cells also exhibited changes in surface structure as revealed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and autoradiographic visualization of the surface-exposed plasma membran ... | 1982 | 7068218 |
| pulmonary lesions in sheep following experimental infection by ehrlichia phagocytophilia and chlamydia psittaci. | 1982 | 7068951 |