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myelitis in a cat infected with toxoplasma gondii and feline immunodeficiency virus.severe necrotizing myelitis secondary to localization and reactivation of toxoplasma gondii within the spinal cord of a domestic shorthair cat was diagnosed by use of light and electron microscopy and immunohistochemistry. the cat also was infected with feline immunodeficiency virus. this case may have useful comparative features to t gondii infections in human patients with acquired immunodeficiency syndrome.19902153650
animal exposures and antibodies to toxoplasma gondii in a university population.to determine the risk of toxoplasma infection to individuals exposed to cats in a research institution, we compared the prevalence of toxoplasma antibodies with exposure to cats in university employees. of 116 employees tested, 42 (36 percent) had toxoplasma antibodies as determined by the indirect fluorescent antibody test. women and individuals aged 35 years or more had a greater prevalence of antibodies. the antibody prevalence by occupation was 72.1 percent for physicians and those with doct ...19902316501
prevalence of toxoplasma gondii infection in man and animals in guangdong, peoples republic of china.tissue and serum samples from animals and man in guangdong province of the peoples republic of china were examined for toxoplasma gondii infection. tissues from 519 swine, 576 rodents, 84 people, one cat and two dogs were bioassayed in mice. t. gondii was isolated from 13 pools of swine tissues, but not from any other hosts. serum samples from animals and man were examined at 1:64 dilution in the indirect hemagglutination test. antibodies to t. gondii were found in 10.4% of 816 pigs, 0.9% of 955 ...19902316181
acute primary toxoplasmic hepatitis in an adult cat shedding toxoplasma gondii oocysts.a 3-year-old 4-kg neutered male domestic shorthair cat died within 5 days after onset of fever and respiratory distress. at necropsy, all tissues were icteric, and the liver had a diffuse reticular pattern. histologically, hepatitis and encephalitis were associated with toxoplasma gondii tachyzoites. toxoplasma gondii female gamonts and oocysts were found in epithelial cells of intact villi and in epithelial cells desquamated into the lumen. finding of acute hepatitis and t gondii oocysts in an ...19902276958
epidemiologic observations on feline immunodeficiency virus and toxoplasma gondii coinfection in cats in baltimore, md.five hundred eighty-five serum samples obtained between 1980 and 1981 from a diverse population of cats were tested by use of an indirect immunoperoxidase assay for antibodies to feline immunodeficiency virus (fiv). results of 14 of the samples were positive (prevalence, 2.4%). the fiv-positive cats were markedly older than the overall population and frequently were coinfected (57%) with toxoplasma gondii. the toxoplasma titers of the fiv-positive cats were significantly (p less than 0.03) highe ...19892537272
humoral immune response to isospora felis and toxoplasma gondii in cats experimentally inoculated with isospora felis. 19911838701
prevalence of toxoplasma gondii antibodies in gravidas and recently aborted women and study of risk factors.two hundred seventeen parturients and eighty six recent aborters were screened for igm and igg toxoplasma antibodies. age, profession, educational level, residence (urban/rural), presence of cat and other domestic animals were recorded for each subject. none of the subjects was igm-positive. prevalence of igg positivity was 52.3% in the parturients and 50.2% in the recently aborted women. none of the personal or social characteristics investigated could be related to igg positivity. however, the ...19902361547
recognition and characterization of stage-specific oocyst/sporozoite antigens of toxoplasma gondii by human antisera.human infection with toxoplasma gondii is presumed due to the ingestion of either tissue cysts containing bradyzoites or oocyst/sporozoites that are excreted in the feces of infected cats. the incidence of human infection in the general population by either of these routes is unknown. we have previously described unique stage-specific oocyst/sporozoite antigens identified by murine hybridoma monoclonal antibodies. we obtained acute and convalescent antitoxoplasma antisera from patients in an epi ...19852581998
the prevalence of toxoplasma gondii antibodies among cats from mahalla el-kobra, gharbia governorate.toxoplasma gondii antibodies were detected using indirect haemaggulination (iha) and indirect fluorescent antibody (ifa) tests. positive reactions were detected among 18.5% and 12.5% of stray (92) and owned cats (32) using iha-test respectively. with ifa-test antibodies were 20.7% and 15.6% respectively.19892651536
a serological survey of toxoplasma gondii infection in zoo animals and other animals.a survey for toxoplasma gondii (tp) infection in the animals bred or caught in and around kobe municipal oji zoo was conducted by the latex agglutination (la) test using plasma samples collected for the years from 1980 to 1988. plasma antibody to tp (greater than or equal to 1:64) was found in 5.0% (0 of 181) mammals belonging to 28 families of 10 orders and 6.7% (12 of 179) aves belonging to 22 families of 15 orders, respectively. cats, rats and pigeons caught in and around the zoo lower positi ...19892607744
toxoplasmic retinochoroiditis--a historical review and current concepts.toxoplasmic retinochoroiditis usually presents during the first three decades of life as a consequence of intra-uterine infection by toxoplasma gondii. the ingestion of infected undercooked meat, or foodstuffs contaminated by infected cat faeces, constitute the primary sources of infection for the non-immune mother. it is thought that following congenital infection, toxoplasma cysts remain dormant in otherwise normal retina and that acute retinochoroiditis is the result of reactivation of the pa ...19892665625
dung beetles, onthophagus spp., as potential transport hosts of feline coccidia.cockroaches and filth-flies have been known to be transport hosts of toxoplasma gondii but the role of dung beetles as the carrier of coccidian oocysts is not known. we attempted to clarify the role of dung beetles (onthophagus spp.) as the transport host of feline coccidia including toxoplasma. toxoplasma oocysts were found in the feces of the beetles until day 3 after the insects were exposed to cat feces mixed with the oocysts. furthermore, oocysts on the body surface of beetles were not easi ...19902348594
serologic diagnosis of toxoplasmosis in cats fed toxoplasma gondii tissue cysts.serum samples derived from 7 cats 3 to 950 days after cats were fed tissue cysts of toxoplasma gondii were evaluated using sabin-feldman dye, modified agglutination, indirect hemagglutination, and latex agglutination tests. the modified agglutination test, using whole formalin-preserved tachyzoites, was more sensitive for diagnosis of toxoplasmosis than were other tests. titers from the modified agglutination test that used formalin-preserved tachyzoites were higher than those from the modified ...19892722663
[the incidence of toxoplasmosis among wild vertebrates of turkmenia (based on serologic data)].985 wild small mammals and birds were serologically investigated for toxoplasmosis from 1981 to 1984 in turkmenia: antibodies to toxoplasma gondii in the indirect hemagglutination and immunofluorescent complement fixation reactions according to goldwasser and shepard were found in 247 (25.0%), in 11 of 17 investigated species of mammals and in 13 of 22 species of birds. a sharp rise in the toxoplasmosis infection level of wild mammals was found out serologically for the first time (from 1.2% in ...19882976145
efforts towards a vaccine against toxoplasma gondii: a review.in a review, past as well as present investigations carried out towards a vaccine against toxoplasmosis are outlined. a historical retrospect of the various immunization experiments is given, recent research projects intending the characterization of antigens that are relevant to host protective immunity are described, and a prospect to future problems and developments expected in the field is drafted.19883066067
[toxoplasma gondii infection among wild and domestic animals]. 19883071919
feline immunodeficiency virus, feline leukaemia virus, toxoplasma gondii, and intestinal parasitic infections in taiwanese cats.a population consisting of 70 breeder cats, 43 clinical cases, and 16 feral cats was examined for the presence of toxoplasma gondii, feline immunodeficiency virus (fiv), and feline leukaemia virus (felv). no oocysts of t. gondii were observed in 96 faecal samples; faecal samples were not available from the feral cats. other intestinal parasites identified included isospora felis (three cats), isospora rivolta (five), dipylidium canium (two), toxocara cati (four), toxascaris leonina (one), and an ...19902171713
regulation of indoleamine 2,3-dioxygenase gene expression in human fibroblasts by interferon-gamma. upstream control region discriminates between interferon-gamma and interferon-alpha.the interferon (ifn)-gamma-mediated induction of indoleamine 2,3-dioxygenase (ido) enzyme, which converts tryptophan into n-formylkynurenine, has been implicated in the inhibition of intracellular pathogens, e.g. toxoplasma gondii and chlamydia psittaci, and in the antiproliferative effect of ifn-gamma on tumor cells. the ido activity is induced strongly in many cell types by ifn-gamma but rather poorly by ifn-alpha or -beta. a genomic dna clone containing part of the transcribed region of the i ...19902174056
[hygienic problems of keeping pets in the federal republic of germany].pet animals i.e. vertebrates from fish to mammals are often suspected to transmit germs of various systematic position (viruses, bacteria, fungi and parasites) to human beings. a critical analysis shows that only a very limited number of such organisms can be transmitted from animals to man. zooanthroponoses with pet animal origin is a very rare phenomenon. bacteria like salmonellae which were incriminated to be the cause of about 250,000 infections of man per year, particularly of children, in ...19863107276
long-term persistence of toxoplasma gondii in tissues of pigs inoculated with t gondii oocysts and effect of freezing on viability of tissue cysts in pork.to study the distribution of tissue cysts in porcine tissues, 16 pigs were fed oocysts of 4 strains of toxoplasma gondii (4 pigs/strain). pigs were euthanatized between postinoculation days 103 and 875 and portions of 5 to 14 organs were bioassayed in mice and/or cats for t gondii. for bioassays, 50- to 100-g portions of tissue were incubated in acidic pepsin solution to free bradyzoites from cysts in parenchyma, and washed sediment from the digests of each specimen was inoculated sc into mice ( ...19883400928
prevalence of toxoplasma gondii infection in cats in georgia using enzyme-linked immunosorbent assays for igm, igg, and antigens.serologic prevalence of toxoplasma gondii infection was determined using enzyme-linked immunosorbent assays detecting immunoglobulin m (igm), immunoglobulin g (igg), and circulating t. gondii antigens (ag) in 81 healthy cats and 107 cats with clinical signs referable to toxoplasmosis. a higher prevalence of infection was detected using the three assays together in healthy cats, clinically ill cats, and combined healthy and clinically ill cats than when igg class antibody detection alone was used ...19892815532
fatal toxoplasmosis and enteroepithelial stages of toxoplasma gondii in a pallas cat (felis manul).toxoplasma gondii was found in tissues of a six-year-old female pallas cat (felis manul) from the milwaukee county zoo. toxoplasma gondii meronts (types d and e), gamonts, and oocysts were present in the epithelium of the small intestine. numerous unsporulated oocysts were present in the intestinal lumen. the cat died of acute, overwhelming toxoplasmosis. necrotic enteritis, multifocal necrotizing granulomatous hepatitis, and pneumonia were the prominent lesions.19883199337
helminthiasis and toxoplasmosis among exotic mammals at the santiago national zoo.parasitologic evaluations of 112 fecal specimens from 292 mammals from the santiago national zoo (36 specimens were pooled specimens from greater than or equal to 2 animals) indicated that 51 mammals had protozoa or helminths in their feces. most of the parasites in the herbivorous species were trichurids and strongylids, whereas most of the parasites in the carnivorous species were ascarids. coccidia spp and giardia spp were the most frequently detected protozoans in the mammals evaluated. of 1 ...19863505930
experimental feline toxoplasmosis: humoral immune responses of cats inoculated orally with toxoplasma gondii cysts and oocysts. 19902391788
toxoplasmosis.toxoplasma gondii is a protozoan parasite that infects most species of warm-blooded animals, including human beings. infection in cats is of particular interest because felidae (domestic and wild) are the only known definitive hosts for t. gondii and thus are the main reservoirs of infection. clinical and public health aspects of t. gondii infections in cats and dogs are discussed in this article.19873328395
[toxoplasma gondii infections and oocyst shedding in domestic cats and the significance of this for the epidemiology and epizootiology of toxoplasmosis].because of the dissemination of oocysts the cat and other felines have a central position within toxoplasma gondii epidemiology and epizootiology. from 1984 to 1986, 267 cats between 2 months and 15 years old were serologically examined (sft) for toxoplasma antibodies. the rate of infection was 59.9 per cent. the infection rate of stray cats (72.5%) was significantly higher than that of domestic cats (40%). the high infection rate of herbivores results from behaviour of stray cats. in faeces of ...19892782669
congenital toxoplasmosis in abyssinian cats.two of three litter-mate kittens born to an abyssinian cat died of acute toxoplasmosis. toxoplasma gondii was found in histologic sections of both kittens and this was confirmed by immunoperoxidase staining.19892773276
antitoxoplasma antibody in clinically suspected cases of human toxoplasmosis.(1) seventy sera from a variety of patients suffering from different diseases suspected to be caused by toxoplasma gondii infection and forty from non-toxoplasmic hospital cases and laboratory and hospital staff were collected. (2) antitoxoplasma antibody was detected in those sera by indirect haemagglutination test (iha test) and enzyme linked immunosorbent assay (elisa). (3) twenty one (30%) sera out of 70 test samples and 2 (5%) out of 40 control samples were positive by elisa test. with iha ...19902397947
sarcocystis capracanis and toxoplasma gondii infections in range goats from texas.specimens of tongues, esophagi, diaphragms, or abdominal muscles of 115 range goats from san angelo, tex, were examined for sarcocystis and toxoplasma gondii infections. sarcocystis spp zoites were found microscopically in pepsin digests of muscles of 60.8% goats and sarcocysts of s capracanis were found in histologic sections of 27.8% goats. sarcocysts were more common in sections of tongue (19.1%) than in those of other muscles (9.9% to 10.7%). a dog fed sarcocystis-infected tissues shed sporo ...19863083732
toxoplasma gondii infection: a potential danger to the unborn fetus and aids sufferer. 19902183258
diagnosis of recent toxoplasma gondii infection in cats by use of an enzyme-linked immunosorbent assay for immunoglobulin m.subclinical toxoplasma gondii infection was induced in young and adult cats by oral administration of tissue cysts. an antibody-capture elisa to detect anti-toxoplasma igm-class antibodies in the serum of cats was developed. the serologic response to experimental infection was followed in the 2 groups of cats by use of anti-toxoplasma igm and igg detection. this study shows that anti-toxoplasma igm-class antibody titers develop early in the course of experimental infection in cats and that the c ...19892802336
enzyme-linked immunosorbent assay for the detection of circulating antigens of toxoplasma gondii in the serum of cats.an elisa was developed to detect circulating antigens of toxoplasma gondii in the serum of cats. for the experiment, toxoplasmosis was induced in a group of cats by oral administration of bradyzoites. an elisa that detects anti-toxoplasma igg, an elisa to detect circulating antigens, and fecal examinations were performed on samples from each cat for 1 year after inoculation. when coupled with igg-class antibody measurement, antigen detection can aid in the diagnosis of some cases of subclinical ...19892802337
[a survey of toxoplasma gondii infection of miners in the nantun coal mine]. 19883409307
[human toxoplasmosis].toxoplasmosis infection is transmitted from cat faeces or insufficiently heated meat from e.g. pigs, sheep and goats. if pregnant women are infected with toxoplasma gondii, there is a risk of infection of the foetus with the possibility of development of congenital toxoplasmosis and, in patients with aids, a latent infection may be activated with subsequent fatal encephalitis. human infections with t. gondii are common but are frequently asymptomatic. the prevalence of t. gondii infection in the ...19902184555
oocyst-induced toxoplasma gondii infections in cats.to investigate the oocyst-induced cycle with a 21+ day prepatent period, 32 cats were fed 5 x 10(5) to 2 x 10(7) sporulated oocysts of toxoplasma gondii and necropsied between 4 hr and 41 days thereafter. the presence of the earliest stages in 7 cats was tested in mice. the tissues of 25 cats were studied histologically; 17 were bioassayed by feeding them to cats to determine, by the length of the prepatent period, whether bradyzoites were present. based on previous studies, a short (3-10 days) ...19892795377
prevalence of toxoplasma gondii in meat animals, cats and dogs in central scotland. 19873580823
toxoplasma gondii antibodies in cats: detection by indirect hemagglutination and indirect fluorescent antibody tests. 19863525796
prevalence of chlamydia, toxoplasma, toxocara and ringworm in farm cats in south-west england.the prevalence of infection with chlamydia psittaci, toxoplasma gondii, toxocara cati and microsporum canis was examined in 51 cats on 22 sheep farms in the bristol area. serum antibody to c psittaci and t gondii was present in 45 per cent and 47 per cent of cats, respectively. at the time of sampling c psittaci was isolated from 6 per cent of the cats, t cati was identified in 63 per cent of faecal samples but neither t gondii nor m canis was isolated. when examined according to the farm of ori ...19873672827
epidemiologic observations on infection with toxoplasma gondii in three species of urban mammals from baltimore, maryland, usa.the prevalence of antibodies to toxoplasma gondii was determined in three species of domestic and commensal mammals, from baltimore, maryland, usa. crude prevalences of infection were 14.5% in cats (n = 650), 32.2% in dogs (n = 233), and 49.5% in norway rats (n = 109). oocysts identical to t. gondii were detected in 0.5% of cat feces. cats and rats showed antibody prevalence rates which were strongly age-(or some age-related variable) dependent, with the highest rates associated with older anima ...19863557837
[toxoplasma gondii in haiti. results of a sero-epidemiologic survey in a rural area].in haiti, positive immunofluorescent tests are observed in 5.9% of the inhabitants of a rural area in the south of the country. the index of positive reactions is increasing with age. no difference between males and females is noticed. seropositive cases are clustered within defined families for 60% of them. the antibodies titers are low: 8 i. u. for 88% of cases. the prevalence of toxoplasmosis varies from 0 to 15%, according to the village, without any clear relationship with rainfall, altitud ...19863549023
[incidence of toxoplasma gondii oocysts in cat feces].within two years and a half, the faeces of 620 cats coming from brno and the area around the city were subjected to parasitological examination with special regard to the occurrence of the oocysts of toxoplasma gondii. sucrose solution at the specific weight of 1,150 was used as flotation medium. oocysts of toxoplasma gondii were eliminated by eight cats (1.29%) at the age from 16 days to 1.5 years. six of the eight cats were younger than seven months. the toxoplasma gondii oocysts were eliminat ...19863095977
low prevalence of toxoplasma infection in a rocky mountain prenatal population.congenital toxoplasmosis is rarely diagnosed in colorado. to better determine whether this was the result of under-reporting or a valid observation, the sera of 120 consecutive prenatal patients from a lower-income clinic population were tested for antibodies to toxoplasma gondii. four of the patients had positive sabin-feldman dye tests, for a 3% incidence of past infection. none had immunoglobulin m (igm) antibody. this rate is considerably lower than that in other populations, perhaps because ...19873684127
[relation between the occurrence of antibodies against toxoplasma gondii and clinical findings in cats].within a three-year period, 178 clinically healthy and 442 sick cats (patients of the clinic for small animal diseases of the university of veterinary medicine, brno) were examined for the presence of antibodies to toxoplasma gondii. antibodies to t. gondii were detected in 34.8% of the animals without clinical signs of the disease and in 54.3% of the sick cats (p less than 0.01). compared with the group of clinically healthy cats, the specific antibodies occurred significantly more frequently i ...19883127985
epizootiologic investigations on a sheep farm with toxoplasma gondii-induced abortions.during the lambing season of 1983/1984, 8 of 44 purebred hampshire ewes on a farm in knoxville, md had reproductive problems. in at least 4 of these ewes, the problem was attributed to toxoplasmosis. necrosis and toxoplasma gondii tachyzoites were found in placental specimens from 3 ewes. agglutinating antibody to t gondii, at a titer of 1:80, was found in pleural fluids of both fetuses aborted from 1 ewe; this ewe had an antibody titer of 1:6,400 at the time of abortion. in another ewe, the dia ...19863700210
a serological survey of the prevalence of toxoplasma gondii antibodies in dogs and cats in saudi arabia.the prevalence of antibodies to toxoplasma gondii in dogs and cats were determined by an indirect haemagglutination (iha) test. 3% of the dogs' sera and 15.2% of that of the cats showed titres diagnostically significant of toxoplasmosis in humans; their possible role in transmission of toxoplasmosis to humans in saudi arabia is discussed.19863750391
[reinfection by toxoplasma gondii nicolle & manceaux, 1909 in mice and cats. experimental study]. 19853836484
toxoplasma gondii-induced abortion in dairy goats.three of 8 goats on a maryland farm aborted or had dystocia associated with toxoplasmosis during the winter of 1984. doe 1 aborted a decomposed fetus 30 days before term. modified agglutination test (mat) antibody titers against toxoplasma gondii were found in pleural fluid of the fetus (1:1,024) and in serum of doe (1:4,096 at 31 days after abortion). doe 2 aborted a fetus 5 days before term; mat antibody was found in the pleural fluid of the fetus (1:16,384) and in the doe's serum (1:4,096 on ...19863700211
[opportunistic toxoplasma gondii infections].in children with cellular immune deficiency, toxoplasmosis may result in severe infection, chiefly because of cerebral impairment presenting as meningo-encephalitis or as a pseudo-tumoral syndrome. allogenic bone marrow transplantation or aids are high risk situations. most often it is a reviviscence of former foci toxoplasma cysts. diagnosis is difficult because serology is not contributive. isolation of trophozoites in the cerebrospinal fluid is rare. cat scan and sometimes cerebral biopsy all ...19853833107
isospora (toxoplasma) gondii: induction of sexuality.the role of the stomach and small intestine of cats and of the parasite's rate of multiplication on induction of sexuality in isospora (toxoplasma) gondii was studied by injecting cats either with free cystozoites or proliferative parasites directly into the intestinal lumen, after laparotomy. oocyst production was similar in cats infected orally with cysts or cystozoites and in cats infected by inoculation into the duodenal lumen with free cystozoites, obtained by either mechanical rupture of b ...19863757068
congenital toxoplasmosis: epidemiologic features and control.toxoplasmosis is caused by the parasite toxoplasma gondii. it is acquired from undercooked meat or from food or fomites contaminated by cat feces. the disease can be transmitted to the fetus only during maternal parasitemia, which is associated with primary infection. extrapolation from current data suggests that there are 140 to 1400 cases of congenital toxoplasmosis per year in canada and that 70 to 280 of the infants are severely affected at birth; many of the others suffer sequelae later in ...19863756692
correlation of tissue infection and serologic findings in pigs fed toxoplasma gondii oocysts.each of thirteen 6-week-old pigs was inoculated per os with 10,000 sporulated oocysts of toxoplasma gondii. by postinoculation day (pid) 13, pigs were seropositive by the indirect fluorescent antibody test. beginning on pid 13 and every 7 days thereafter through pid 97, 1 pig was killed and 6 tissues were examined for t gondii. of the 13 pigs, 11 were infected, including the 1st pig killed on pid 13, although none of the pigs had gross lesions of toxoplasmosis. tissues harboring t gondii most fr ...19853890633
macrophage-mediated fungistasis: requirement for a macromolecular component in serum.peritoneal macrophages from mycobacterium bovis- or toxoplasma gondii-infected mice cultured in vitro in dulbecco's medium containing 10% fetal bovine serum (fbs) and endotoxin stopped replication of cryptococcus neoformans for 30 hr, whereas yeast cells cultured alone reproduced with a 3.0-hr doubling time. without at least 5% fbs, macrophage fungistasis was poor. fbs without macrophages enhanced the growth rate of cryptococci. macrophages preincubated in vitro for 24 hr without serum became fu ...19863522734
carbon immunoassay--a simple and rapid serodiagnostic test for feline toxoplasmosis.a serodiagnostic test, simpler and more rapid to perform than traditional methods, was sought to identify toxoplasma gondii antibody in research cats. the reliability and sensitivity of the direct and indirect carbon immunoassay (cia) tests were compared to each other and to the indirect immunofluorescent antibody (ifa) test. the three tests were used to detect the presence or absence of t. gondii antibody in the sera of 94 cats. the results of this study show that the cia tests correlate with o ...19853900579
congenital toxoplasmosis.infection with toxoplasma gondii, which occurs in both men and women, is usually subclinical and benign. infection during pregnancy, however, may be a serious and even life-threatening event for the fetus. antenatal education should focus on avoidance of contact with the sources of infection: the domestic cat and raw or rare meats. a review of toxoplasmosis is presented, and means for its primary prevention through antenatal education are outlined.19853906054
toxoplasma gondii infection of cats in beirut, lebanon.the prevalence of serum antibodies to toxoplasma gondii was determined by the indirect fluorescent antibody (ifa) test in cats of beirut, lebanon from september 1980 to july 1983 (35 months). testing revealed that 253/324 (78.1%) cats had antibodies in the ifa test. while the prevalence of toxoplasma antibodies in stray cats was considerably greater than in owned cats at the beginning of the study, this difference diminished over time, and prevalence was similar by the end of the study. faecal s ...19853915329
[incidence of antibodies to toxoplasma gondii in cats from brno and the surrounding area].in the course of three years, 620 cats of all age categories were investigated for the occurrence of antibodies to toxoplasma gondii. the serological examinations included the sabin-feldman reaction (sfr), complement-fixation reaction (cfr) and microprecipitation in agar gel (mpa), according to methods prescribed for use in czechoslovakia. when the sabin-feldman reaction was used, 250 (40.3%) of the examined cats were found to be positive at the titre of 4-128. by the complement-fixation reactio ...19883128910
the seasonal prevalence of the toxoplasma gondii infections in stray cats from urban area studied by parasitological methods. 19863767640
a review of toxoplasmosis of animals in the u.s.s.r.information on the serologic and parasitologic prevalence of toxoplasma gondii infection in domestic and wild animals of the u.s.s.r. is reviewed. although complement-fixing antibodies to t. gondii were widely prevalent in animals, little information is available on the presence of viable t. gondii in tissues of animals. reports of epizootics in which t. gondii was suspected to be the causative agent of toxoplasmosis are summarized. also, the strict economic impact of toxoplasmosis on agricultur ...19863518211
the life cycle of the coccidian parasite, toxoplasma gondii, in the domestic cat. 19714104434
[epidemiological and serological prospective study on toxoplasma gondii infection (author's transl)]. 19734147703
transmission of toxoplasma gondii. further studies on the morphology of the cystic form in cat faeces. 19694192365
[toxoplasma gondii, isospora felis-natural and experimental infection in cats]. 19734204004
sex determination and sex differentiation in coccidia: gametogony and oocyst production after monoclonal infection of cats with free-living and intermediate host stages of isospora (toxoplasma) gondii.clones of single oocysts, single sporocysts, single sporozoites, single proliferative parasites, single cysts and single cystozoites of isospora (toxoplasma) gondii (kb-strain) were made under visual control using a de fonbrune micromanipulator. cloning was successful in 28, 32, 21, 8, 54 and 7% of the trials, respectively. all clones were used for monoclonal infection in non-immune conventionally reared (cv) or specified pathogen-free (spf) cats. pre-patent and patent periods, sporulation perce ...19853982853
prevalence of naturally occurring toxoplasma gondii infections in cats from u.s. military installations in japan. 19724565841
[developmental cycles, development phases and systematic position of toxoplasma gondii]. 19704101666
persistence of encysted toxoplasma gondii in tissues of equids fed oocysts.thirteen 6-month- to 13-year-old equids were each inoculated orally with 10,000 infective toxoplasma gondii oocysts. the equids remained clinically normal. equids were euthanatized on postinoculation days 33, 45, 90, 104, 120, 140, 162, 183, 197, 204, 211, 294, and 476. their tissues were bioassayed for viable oocysts by feeding muscles to toxoplasma-free cats and by inoculation of pepsin digests of 13 organs into mice. using mouse inoculation, t gondii was recovered from tissues of the 9 equids ...19854037503
ultrastructural study of early stages of asexual multiplication and microgametogony of toxoplasma gondii in the small intestine of the cat. 19744528099
toxoplasma gondii: parasitology and transmission. 19744592094
an investigation of the relationship between infection with toxoplasma gondii and contact with animals. 19744426086
[life cycle of toxoplasma gondii]. 19715152922
the potential role of cats in the epidemiology of toxoplasma gondii infections. 19734573133
antibodies to toxoplasma gondii and coxiella burneti among students and other personnel in veterinary colleges in california and brazil. 19744606228
[biology of toxoplasma gondii and transmission of toxoplasms infections]. 19744601298
serologic diagnosis of toxoplasmosis and prevalence of toxoplasma gondii antibodies in selected feline, canine, and human populations. 19734574472
[new aspects on the transmission and life cycle of toxoplasma gondii]. 19734702988
intermediate and transport hosts in the natural history of toxoplasma gondii. 19734717688
toxoplasma gondii oocysts in the faeces of naturally infected cat. 19734704505
experimental transmission of toxoplasma gondii by cockroaches. 19724664113
the role of the cat in the natural history of toxoplasma gondii. 19734706426
antibodies to toxoplasma gondii and contact with animals in the home. 19734738019
the toxoplasma gondii oocyst from cat feces.coccidian oocysts resembling those of isospora bigemina were excreted by cats fed toxoplasma. in order to identify these oocysts with toxoplasma infectivity a number of critical comparisons were made. the appearance of oocysts and toxoplasma infectivity was simultaneous in the feces of 23 of 24 adult cats, 3-5 days after feeding of toxoplasma cysts; in the feces of 4 out of 9 cats, 7-10 days after feeding of trophozoites; and in 8 out of 17 cats, 20-24 days after feeding of cat feces containing ...19704927658
[neonatal toxoplasmosis in kittens].the occurrence of toxoplasmosis is described in the cat-mother and three kittens. clinical symptoms were not significant: bristled hair, conjunctivitis, sneezing and hypertrophy of mandibular and popliteal lymph nodes. the titres of antibodies to toxoplasma gondii were demonstrated in all kittens and also in the cat: sabin-feldman reaction titre 4-32, complement-fixing reaction titre 5-40. microprecipitation in agar gel was positive in all animals. oocytes of toxoplasma gondii were eliminated th ...19853929452
toxoplasma gondii in cats: fecal stages identified as coccidian oocysts.isospora-type oocysts were excreted by cats following the ingestion of toxoplasma fromn infected mice. oocysts appeared 3 to 5 days after cyst. were ingested and 8 to 10 days after trophozoites were ingested, and also 21 to 24 days after the administration of infective fecal suspensions from cats. a close quanititative and biologic correlation between oocysts and toxoplasma infectivity of the feces was observed which could not be separated by density gradient centrifugation and filtration method ...19704903651
effect of irradiation on the viability of toxoplasma gondii cysts in tissues of mice and pigs.muscles from tongue, heart, and limbs of 14 pigs inoculated orally with toxoplasma gondii oocysts were irradiated with 10, 20, 25, and 30 krad of gamma (cesium-137 and cobalt-60) irradiation. viability of t gondii cysts was assayed by feeding porcine muscles to t gondii-free cats and/or by inoculation of sediment from acid-pepsin digested porcine muscle into mice. cats fed 500-g samples of muscles irradiated with up to 20 krad shed t gondii oocysts. cats fed muscles irradiated with 25 or 30 krad ...19863963554
[developmental stages of toxoplasma gondii in the mammalian organism]. 19704989308
toxoplasmosis. with special reference to transmission and life cycle of toxoplasma gondii. 19715000696
[coccidial form of toxoplasma gondii and fecal contagiousness]. 19725066092
[ultrastructure of the macrogametes in toxoplasma gondii]. 19725066558
[studies on the host specificity of the sexual development cycle of toxoplasma gondii]. 19725057361
a simplified method for isolation of toxoplasma gondii from the feces of cats. 19725078580
coccidian-like nature of toxoplasma gondii. 19725041121
effects of different conditions on duration of infectivity of toxoplasma gondii oocysts. 19725078600
endogenous development of the coccidian parasite toxoplasma gondii. 19715097841
transmission of toxoplasma gondii to cats via ingestion of infected pork. 19715128793
experimental transmission of toxoplasma gondii by filth-flies. 19715088390
isolation of toxoplasma gondii from the feces of naturally infected cats. 19715124973
[coccidio-like toxoplasma gondii]. 19715146067
[electron microscopical studies on the microgametogeny of toxoplasma gondii]. 19715132043
on the gametogonic cycle of toxoplasma gondii. 19715162518
isolation of toxoplasma gondii from guinea pigs in singapore. 19715168251
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