Publications

TitleAbstractYear(sorted ascending)
Filter
PMID
Filter
an immunological phenomenon in chickens following infection with mycoplasma gallisepticum. 196113774131
control of experimental mycoplasma gallisepticum infection in young chickens with tylosin and other antibiotics. 196514253997
chicken red blood cell adsorption test for detection of colonies of mycoplasma gallisepticum developed on agar media. 196514284965
comparison of tube agglutination, hemagglutination-inhibition (hi) and antiglobulin titers on serums of chickens and turkeys infected with mycoplasma gallisepticum. 196514340910
infectious coryza of chickens. v. influence of mycoplasma gallisepticum infection on chicken infected with haemophilus gallinarum. 19655871448
immunological competence of the chicken embryo and neonatal chicken to mycoplasma gallisepticum. 19665928623
control of chronic respiratory disease. vii. the effect of controlled versus natural infection of chickens with mycoplasma gallisepticum on egg transmission. 19666007130
the incidence of mycoplasma gallisepticum, salmonella pullorum, salmonella typhimurium, and newcastle disease virus antibodies in certain wisconsin chickens. 19666008331
a comparative study of single and multiple respiratory infections in the chicken: single infections (with mycoplasma gallisepticum and newcastle disease virus). 19665339513
a comparative study of single and multiple respiratory infections in the chicken: multiple infections (with mycoplasma gallisepticum, newcastle disease virus, and infectious bronchitis virus). 19664961637
serological and bacteriological observation of chickens intranasally inoculated with mycoplasma gallisepticum. 19675587627
aerosol studies with avian mycoplasma. 2. infectivity of mycoplasma gallisepticum for chickens and turkeys. 19675339761
use of formalinized mycoplasma gallisepticum antigens and chicken erythrocytes in hemagglutination and hemagglutination-inhibition studies.antigens were prepared from mycoplasma gallisepticum in the logarithmic phase of growth and were treated with 2, 5, and 10% formalin by slow diffusion through a dialysis sac. chicken erythrocytes were similarly treated with 20% formalin. formalin-treated antigens hemagglutinated fresh and formalinized chicken erythrocytes. the antigens retained this hemagglutinating ability over an extended period.19676029826
mycoplasma gallisepticum infection in germfree and conventional chickens: experimental studies with a culture of low virulence. 19676033700
the action of mycoplasma gallisepticum upon chicken, rabbit, and cow erythrocytes. 19676069464
pathology in chickens experimentally inoculated or contact-infected with mycoplasma gallisepticum. 19676073844
serological responses of chickens naturally infected with mycoplasma gallisepticum and the effect of tylosin on these responses. 19676078266
activity of bottromycin against mycoplasma gallisepticum. 19685673297
early lesions in chicken and turkey embryos inoculated with mycoplasma gallisepticum strain s6 at various stages of incubation. 19685686257
antibodies for newcastle disease virus and mycoplasma gallisepticum in sera from domestic chickens and game fowl of kenya. 19685690176
inactivated culture vaccine against mycoplasma gallisepticum infection in chickens. 19685690690
non-specific antibodies in chickens inoculated intratracheally with mycoplasma gallisepticum. 19685695834
penetration patterns of mycoplasma gallisepticum and newcastle disease virus through the outer structures of chicken eggs. 19685749023
latent infection of chickens with mycoplasma gallisepticum. 19685749601
methods of eradication of mycoplasma gallisepticum from chickens. 19685751830
eradication of mycoplasma gallisepticum infection in a chicken flock on a breeding farm. 19685753133
serological tests for the detection of antibodies to mycoplasma gallisepticum in chickens and turkeys. 19685250132
nature of antibody response of chickens to mycoplasma gallisepticum. 19695366356
serological response produced in chickens by three strains of mycoplasma gallisepticum. 19695369170
pathogenesis of arthritis induced in chickens by mycoplasma gallisepticum. 19695371120
mixed infection with infectious bronchitis virus and mycoplasma gallisepticum in a chicken flock. 19695392003
a ward hemagglutinin induced in chickens by inoculation with mycoplasma gallisepticum. 19694885342
effect of lincomycin and spectinomycin water medication on chickens experimentally infected with mycoplasma gallisepticum and escherichia coli. 19694907438
the development of a non-infectious carrier state in chickens infected with mycoplasma gallisepticum. 19705448138
mixed infection with mycoplasma gallisepticum and the b1 strain of newcastle disease virus in chickens. 19705453398
contact transmission of mycoplasma gallisepticum and its prevention. 19705453399
pathogenicity of avian reovirus and its influence on the infection of mycoplasma gallisepticum in chickens. 19704318212
a comparison of radiographic lesions in pelvic limbs of chickens infected with mycoplasma gallisepticum, mycoplasma synoviae, or an arthritis-producing virus. 19705503017
growth and survival of germfree and conventional chicks inoculated with mycoplasma gallisepticum. 19715567423
effect of tylosin on chickens infected with mycoplasma gallisepticum and the newcastle disease virus b1 strain. 19715569697
interaction of mycoplasma gallisepticum, mild strains of newcastle disease virus and infectious bronchitis virus in chickens. 19715569701
influence of newcastle disease and infectious bronchitis live vaccines on chickens infected with mycoplasma gallisepticum. 19715569702
multiplication of mycoplasma gallisepticum and newcastle disease virus b1 strain in the respiratory tract of chickens. 19715580498
effect of the newcastle disease virus tcnd strain on mycoplasma gallisepticum infection in chickens. 19715142164
growth and pathogenicity studies of mycoplasma gallisepticum in chicken tracheal organ cultures. 19715167481
the influence of ph of the culture medium on the sensitivity of mycoplasma gallisepticum antigens for use in certain serological tests.mycoplasma gallisepticum antigens were prepared from organisms cultured in broth medium with glucose. the influence of period of growth, ph of the medium and duration of incubation at low ph (5.0) on the sensitivity of these antigens was determined in certain tests. the most sensitive antigen for the serum plate test was harvested after no more than 8 hr. incubation at ph 5.0. sensitivity in serum plate, haemagglutination and gel diffusion tests was impaired if organisms were incubated at ph 5.0 ...19715002646
experimental respiratory disease and airsacculitis in fowls caused by mycoplasma gallisepticum. 19725024311
an outbreak of synovitis caused by mycoplasma gallisepticum in chickens. 19725051901
cold hemagglutinin in serum of chicken infected with mycoplasma gallisepticum. 19725051902
removal of non-specific agglutination reactions by avian sera to the serum plate agglutination test for mycoplasma gallisepticum. 19725062152
escherichia coli serotypes isolated from chickens infected with mycoplasma gallisepticum. 19724559444
the rearing and maintenance of breeding chickens in isolators: 1. glass fibre isolators.a method of 'rearing and maintaining chickens from day old to 80 weeks of age free from infectious bronchitis, newcastle disease, infectious avian encephalomyelitis, celo and gal viruses, lymphoid leukosis, marek's disease, mycoplasma gallisepticum, salmonella pullorum and other salmonella spp., staphylococcus aureus, eimeria spp. and helminths is described. the advantages of glass fibre isolators each with its own ventilation system are outlined.197218777370
metabolic and growth inhibition of mycoplasma gallisepticum by antiserum. 19734578973
effect of ammonia on mycoplasma gallisepticum infection in chickens. 19734792401
interference of mycoplasma gallisepticum with multiplication of newcastle disease virus in chicken tracheal organ cultures. 19734799666
[experimental mycoplasmosis in chickens. ii. pathological findings of chickens inoculated with mycoplasma gallisepticum (strain s6) by the air-sac and intravenous routes]. 19734799960
isolation, ultrastructure and antigenicity of mycoplasma gallisepticum membranes.the cell membrane of mycoplasma gallisepticum was isolated by lysing the cells with digitonin. chemical and density-gradient analyses and electron microscopy showed the isolated membranes to be relatively free of cytoplasmic contaminants. the density of the membranes exceeded that of other mycoplasma membranes, indicating a higher protein content. small vesicular extensions seen in the sectioned membranes were interpreted as empty blebs.the isolated membranes, but not the cytoplasmic fraction, e ...19734520511
immunity and mortality in chickens infected with mycoplasma gallisepticum: influence of the bursa of fabricius. 19734120327
non-specific agglutination of mycoplasma gallisepticum by rheumatoid factor-like antiglobulin in chickens infected with streptococcus faecalis or staphylococcus aureus. 19734199909
an infection in chickens with a strain of mycoplasma gallisepticum of low virulence.a slow-spreading infection due to a strain of mycoplasma gallisepticum was detected serologically in a flock which remained free of clinical symptoms. the strain was shown to be tylosin resistant. serological studies indicated that vertical transmission occurred.19744277360
spiramycin- and tylosin-resistant strains of mycoplasma gallisepticum isolated from breeding chickens and pipped eggs. 19744444733
local immunization in chicken respiratory tract with killed mycoplasma gallisepticum vaccine. 19744474553
a comparison of commercial mycoplasma gallisepticum antigens in the rapid serum agglutination test.twenty-three chickens, aged 9 weeks, were housed in contact with a similar group of chickens which were infected with m. gallisepticum. the onset and development of the serum agglutinin responses which were detected by 3 commercial antigens using rapid serum agglutination tests up to 20 weeks of age, differed greatly both between the infected and in-contact groups and, within the latter group, between the antigens. few reactions, which were weak and transient, were detected in 2 similar groups o ...19751222006
in vivo efficacy of 81.723 hfu, a new pleuromutilin derivative against experimentally induced airsacculitis in chicks and turkey poults.the efficacy of the pleuromutilin derivative 81.723 hfu was tested in chicks and turkey poults by experimentally infecting them with mycoplasma gallisepticum. the data were treated to obtain the mean effective doses, and these were compared to those obtained with tylosin tartrate. the compounds were administered either by ingluvial catheter or via the drinking water. therapy was started on the day of inoculation or 7 days thereafter, respectively. the experiments showed that the compound 81.723 ...19751147586
single and mixed infections of avian infectious bronchitis virus and mycoplasma gallisepticum.comparative studies of the clinical signs, pathological changes, multiplication of the pathogens and serological responses were made of groups of chickens infected with either or both avian infectious bronchitis virus and mycoplasma gallisepticum. electron microscopic examination of thin sections of infected tracheas showed that the multiplication of m. gallisepticum was greatly enhanced in the tracheas of chickens which had been previously or simultaneously infected with avian infectious bronch ...19751126565
a field trial, using killed-mycoplasma gallisepticum vaccine to protect against chicken respiratory mycoplasmosis.in a field trial with chickens, the efficacy of killed mycoplasma gallisepticum vaccine against respiratory mycoplasmosis was determined. broiler chickens were vaccinated by aerosol administration at 3, 14, and 25 days of age, and observations were made of survival rate, body weight gain ratio, macroscopic lesion grade of airsacculitis, isolation of organisms, serologic test results, histopathologic changes, and clinical signs. inhalation of the vaccinal aerosol did not influence livability and ...19751111388
immunization of chickens against mycoplasma gallisepticum infection. 19751092221
interference of mycoplasma gallisepticum with multiplication of newcastle disease virus in chickens. 19751164323
dissociation of mycoplasma gallisepticum membranes with lithium diiodosalicylate and isolation of glycoprotein.m. gallisepticum membranes were treated with 0.3m lithium diiodosalicylate (lis) and, on average, 43% of the original membrane proteins were extracted. the extract contained particles with a sedimentation coefficient of 13s and some aggregated proteins. this lis extract was immunogenic, stimulating the production of haemagglutination-inhibiting, growth-inhibiting and precipitating antibodies in rabbits. it was devoid of haemagglutinating (ha) activity for chicken erythrocytes but did inhibit the ...19751211714
[differentiation of haemophilus strains isolated from chickens. iii. pathogenicity tests in chickens].pathogenicity tests of 6 isolates of the haemophilus-group i (h. paragallinarum) and 8 isolates of the haemophilus-group ii isolated from chickens in the federal german republic and one strain of h. parainfluenzae isolated from man were carried out in 6-week old spf-chickens. infectious coryza (coryza contagiosa gallinarum) could be produced in chickens with all strains of group i after experimental inoculation and by contact exposure. at necropsy 3 weeks post inoculation (p.i.) organisms of gro ...197518777310
clinical, cultural, and serologic observations of avian mycoplasmosis in two chicken breeder flocks.two chicken breeding flocks from different breeding lines were studied serologically and culturally for mycoplasma gallisepticum (mg) throughout their growing and laying period. infection was proven by successful isolation of mg from both breeders and progeny originating from these two flocks. observations of these flocks which were serologically and culturally negative for mycoplasma synoviae (ms) further disclosed that: 1) negative plate tests of large numbers of day-old progeny may sometimes ...19761259662
use of the agar-gel precipitin test to evaluate broiler breeder and commercial layer flocks for mycoplasma gallisepticum infection.in the absence of mycoplasma gallisepticum (mg) isolation, the importance of agar-gel precipitin (agp) tests along with microhemagglutination-inhibition (mhi) and serum plate agglutination (spa) tests for the evaluation of poultry flocks for mg infection was demonstrated. a good correlation between agp, mhi, and spa tests for the early confirmation of mg in a flock was observed, except for the breeder flocks from which wvu 907 was isolated. the serums of such breeder flocks were positive for spa ...1976822817
further observations on the use of a bivalent bacterin against haemophilus gallinarum.chickens vaccinated with two doses of a bivalent haemophilus gallinarum bacterin were protected against seven strains of the organism. vaccinated and unvaccinated birds with antibody to mycoplasma gallisepticum had increased hi titers when challenged with h. gallinarum. birds positive for antibody to mycoplasma gallisepticum which were not challenged showed no increase in hi titer.1976962761
[the "vaccination reaction" syndrome of broilers after vaccination against newcastle disease and infectious bronchitis (author's transl)].in a part of the broiler flocks vaccinated against newcastle disease (n.c.d) and infectious bronchitis (i.b.), disease symptoms of lingering nature have been observed, generally in the second half of the rearing period. in a practical investigation with weekly examinations of chickens, supplemented by a serological examination of twenty-four animals per flock at the age of six weeks, it was hoped to establish the factors responsible for this "vaccination reaction". in the district under notice t ...1976179162
[identification of mycoplasma gallisepticum with a hemadsorption inhibition test]. 1977842193
attachment of mycoplasma gallisepticum to the tracheal epithelium of fowls.an electron microscopical study of fowl trachea infected with mycoplasma gallisepticum showed slight to moderate changes at the cellular level. mycoplasmas were demonstrated extra-cellularly and showed triple membranes, intracytoplasmic spaces, fibrillar nuclear areas and blebs. blebs were seen attached to the plasma membrane of the epithelial cells.1977860098
[studies on the specificity of the hemagglutination inhibition test using mycoplasma gallisepticum and mycoplasma synoviae in experimentally inoculated chickens]. 1977340190
identification of avian mycoplasma isolates by the agar-gel precipitin test.recent isolates of mycoplasma gallisepticum and mycoplasma synoviae were readily typed by the agar-gel precipitin test with antigens prepared by freezing and thawing, sonic vibration, or sodium dodecyl sulfate. specific antisera prepared in rabbits or in foot-pad-inoculated chickens were adequate for culture typing. relatively few sera from chickens and turkeys in naturally infected flocks reacted positively. the precipitin reaction was highly specific, however.1977410403
[respiratory diseases of the fowl:principles of histopathological diagnosis].groups of specific pathogen free chickens were inoculated with five strains of newcastle disease virus, one strain of adenovirus, four strains of infectious bronchitis virus, one strain of mycoplasma gallisepticum and with infectious bronchitis virus together with mycoplasma gallisepticum. lungs and tracheas were taken at regular intervals for histopathological examination. a diagnosis could be based on tracheal lesions at different periods of their development. newcastle disease was distinguish ...197718770313
incidence of pasteurella haemolytica in the respiratory tract of apparently healthy chickens and chickens with infectious bronchitis. characterisation of 213 strains.the tracheal flora of healthy chickens consisted mainly of gram-positive microorganisms. a shift to a predominantly gram-negative flora, mainly due to escherichia, was observed in chickens with respiratory symptoms caused by infectious bronchitis. most of the chickens in which e. coli formed a predominant part of the tracheal flora also showed a positive serological reaction to mycoplasma gallisepticum. a raised incidence of pasteurella haemolytica with increase in age was noted both with regard ...197718770338
infectious coryza: preventing complicated coryza with haemophilus gallinarum and mycoplasma gallisepticum bacterins.three types of infectious coryza were produced in unvaccinated chickens by challenge inoculums containing different combinations of haemophilus gallinarum (hg) and mycoplasma gallisepticum (mg). monovalent and combination bacterins of hg and mg were tested to determine their efficacy against chronic complicated infectious coryza. challenge exposure of vaccinates with mg and hg showed protection against the hg component to be immunotype-specific. some protection against complicated coryza resulte ...1978646755
the isolation of lentogenic strains of newcastle disease virus in australia.twelve isolations of newcastle disease virus were made from 77 clinical samples from chickens from conjunctivitis, respiratory disease, proventriculitis and bursal atrophy. nine of the isolations were made from chickens with conjunctivitis. the viruses were identified as newcastle disease virus by inhibition of their haemagglutinins with specific antiserum to newcastle disease virus. the viruses failed to kill chicken embryos after inoculation into the allantoic cavity and they were judged to be ...1978687276
suppression of immunoresponses to haemophilus gallinarum with nonviable mycoplasma gallisepticum in chickens.the suppressive effect of mycoplasma gallisepticum (mg) on haemophilus gallinarum (hg) immune response was shown. antibody response to hg was highly suppressed when chickens were inoculated intramuscularly with hg-mg combined bacterin. findings were similar in chickens injected intramuscularly with hg and mg bacterin separately at adjacent sites. no immunosuppressive effect was recognized when injections with hg and mg bacterins were in the left and right thigh muscles, respectively, or from int ...1978749885
effect of tiamulin in chickens and turkeys infected experimentally with avian mycoplasma.tiamulin was compared, under a variety of experimental conditions, with 4 water-soluble antibiotic preparations available commercially for the control and treatment of mycoplasmal infections in poultry. in chickens, tiamulin was more effective than the reference antibiotics in preventing and eradicating airsacculitis caused by mycoplasma gallisepticum and preventing airsacculitis and synovitis caused by m. synoviae. in turkeys, tiamulin and tylosin were equally active in preventing airsacculitis ...1978749887
culturing anomalies associated with mycoplasma recovered from the tissues of chicks and turkey poults experimentally infected with mycoplasma gallisepticum or mycoplasma gallinarum.tissues of mycoplasma infected chicks and turkey poults were cultured and subcultured on mycoplasma agar. usually, colonies which grew on the agar initially inoculated could be subcultured, but sometimes they could not. at other times, colonies were not seen on the agar initially inoculated but appeared on the subcultured plate.1978353927
haemadsorption inhibition test for the identification of mycoplasma gallisepticum and mycoplasma synoviae.colonies of the avian mycoplasma strains mycoplasma gallisepticum s6 and mycoplasma synoviae wvu 1853 and two mycoplasma synoviae isolates from this laboratory were shown to be haemadsorption positive for chicken erythrocytes. three mycoplasma synoviae isolates from this laboratory proved to be haemadsorption and haemagglutination negative. the haemadsorption of the mycoplasma colonies mentioned above was inhibited with specific antisera of either high or low titre. no cross-inhibition was obser ...1979473153
isolation and identification of avian mycoplasmas in singapore.two hundred and forty batches of chickens with chronic respiratory syndrome were tested for mycoplasmas. one hundred and five batches (43.8%) were found to have mycoplasmosis. a total of 110 isolates of mycoplasma was cultured, of which nine isolates were identified as mycoplasma gallisepticum, 48 avian sero-group d, 45 m. gallinarum, one m. iners and seven unclassified. 2. identification of the mycoplasmas isolated was carried out by biochemical and serological tests (disc growth inhibition and ...1979455110
an ultrastructural study on the interaction of mycoplasma gallisepticum with the chicken tracheal epithelium.seven-day-old chickens wee intratracheally inoculated with mycoplasma gallisepticum. the tracheas collected 6 and 14 days after chickens were inoculated were subjected to titration of mycoplasma and examination by light and electron microscopy. the mycoplasma organisms grew well; 10(7) to 10(8) color-changing units in a milligram of tissue were determined. tracheal lesions occurred in close association with the presence of mycoplasmas and were characterized by degeneration of the epithelial cell ...1979507485
adaptation of chickens to their handler, and experimental results.chickens were adapted to their handler before the experiment. adapted birds produced more antibody, had more blood protein, gained more weight, and were more resistant to mycoplasma gallisepticum than unadapted birds. the antibody response to sheep red blood cells was not reduced for fasting for 48 hours in adapted birds but was in unadapted birds. differences in antibody titers, blood protein, and weight gains between controls and birds fed 80 ppm of deoxycorticosterone could be demonstrated on ...1979526204
control of mycoplasma gallisepticum in commercial laying chickens using artificial exposure to connecticut f strain mycoplasma gallisepticum. 1979298929
the response of the harderian gland of the fowl to antigen given by the ocular route. ii. antibody production.after ocular administration to young chickens of sheep erythrocytes (srbc), newcastle disease virus (ndv), infectious bronchitis virus (ibv) or mycoplasma gallisepticum, homologous antibody was detected in serum and in saline extracts of harderian glands. parenteral immunisation with srbc or ndv stimulated moderately high serum antibody titres but did not evoke a measurable antibody response by the harderian gland.197918770464
haemadsorption inhibition test for the identification of mycoplasma gallisepticum and mycoplasma synoviae.summary colonies of the avian mycoplasma strains mycoplasma gallisepticum s6 and mycoplasma synoviae wvu 1853 and two mycoplasma synoviae isolates from this laboratory were shown to be haemadsorption positive for chicken erythrocytes. three mycoplasma synoviae isolates from this laboratory proved to be haemadsorption and haemagglutination negative. the haemadsorption of the mycoplasma colonies mentioned above was inhibited with specific antisera of either high or low titre. no cross-inhibition ...197922039774
preliminary clinical pharmacological investigations of tylosin and tiamulin in chickens.summary the minimal inhibitory concentrations (m1c) of tiamulin and tylosin for mycoplasma. gram-positive, and gram-negative micro-organisms isolated from chickens were determinated by the agar dilution method. median m1c values for tiamulin against mycoplasma gallisepticum (0.05 µg/ml) and mycoplasma synoviae (0.10 µg/ml) were 2 to 4 times lower than the corresponding values for tylosin. tiamulin was also slightly more effective in vitro in inhibiting escherichia coli, pasteurella multocida, ...198022039981
development of a microtitration complement-fixation test for diagnosis of mycoplasma gallisepticum infection in chickens.a direct microtitration complement-fixation (cf) test was developed for diagnosis of mycoplasma gallisepticum infection in chickens. cf titers were demonstrated three weeks postinoculation in chickens inoculated intratracheally with m. gallisepticum. the direct microtitration cf test appeared comparable to the hemagglutination-inhibition test in sensitivity and specificity. addition of fresh chicken serum to lyophilized guinea pig complement (gpc') was not necessary to enhance fixaton of gpc' by ...19807436960
performance of 3 successive generations of specified-pathogenfree chickens maintained as a closed flock.no antibodies against salmonella pullorum, mycoplasma gallisepticum, mycoplasma synoviae, haemophilus gallinarum, fowl pox virus, marek's disease virus, herpes virus of turkey, infectious laryngotracheitis virus, avian adenovirus, avian reovirus, infectious bursal disease virus, reticuloendotheliosis virus, avian leukosis virus, avian encephalomyelitis virus and newcastle disease virus were detectable in the sera obtained from these chickens in 3 generations at various ages. antibodies against i ...19806253742
pathogenicity of two strains of mycoplasma gallisepticum in broilers.strains f and r of mycoplasma gallisepticum (mg) were compared in two laboratory trials for their relative pathogenicity in terms of inducing airsacculitis and antibody production to mg. chickens exposed to the r strain had significantly higher incidence of air-sac lesions (p less than 0.05) and greater severity of airsacculitis than did chicks exposed to the f strain. in both trials, chickens vaccinated simultaneously with newcastle disease-infectious bronchitis vaccine and exposed to mg had mo ...19806268040
production and persistence of antibodies in chickens to sheep erythrocytes. 2. resistance to infectious diseases.a line of chickens selected for ability to product high antibody titers to sheep red blood cells exhibited stronger antibody to newcastle disease, was more resistant to mycoplasma gallisepticum, eimeria necatrix, a splenomeglia virus, and feather mites and less resistant to escherichia coli and staphylococcus aureus infection than a line selected for a lack of ability to produce antibody titers. a line of chickens selected for a nonpersistance of antibody titers to sheep red blood cells was rela ...19806997852
[clinical and pharmacological studies of technical tylosin phosphate from pharmachem in poultry diseases].investigations on the healing anbd prophylactic effectiveness of the technical tylosine phosphate "pharmachim" with 50 iu/mg activity (pharmazin t-50) in some bird diseases were carried out. it was established that a dose of 20 g/kg fodder pharmazin t-50 applied 2 days pre- and 3 days post chicken mycoplasma gallisepticum infection protects the chickens completely from respiratory mycoplasmosis. in order to attain a sure healing and prophylactic effect in hen spirohetosis control 10 g/kg fodder ...19806998102
evaluation of a vaccine against mycoplasma gallisepticum in commercial broilers.the efficacy of live mycoplasma gallisepticum (mg) vaccine against respiratory mycoplasmosis was studied in three laboratory trials with commercial broilers. broiler chickens were infected with the f or r strain of mg by eyedrop at 1 day of age, and challenged by aerosol exposure to the r strain of mg along with eyedrop vaccination against newcastle disease and infectious bronchitis at 30 or 34 days of age. observations were made of macroscopic lesions, severity of airsacculitis, isolations of m ...19807271643
the growth and cilia-stopping effect of mycoplasma gallisepticum 1rf in chicken tracheal organ cultures.the growth and pathogenicity of mycoplasma gallisepticum 1rf were studied in chicken tracheal organ cultures. the organism propagated only in the presence of tracheal rings in culture fluids. presence of metabolic products from rings seems to be an important factor for the growth of organism. production of hydrogen peroxide was not detected. there were no differences in the growth and cilia-stopping effects among organisms maintained in vitro, stored at -18 degrees c, and recovered from air sac, ...19807375737
Refresh
firstprev
123456
nextlast
Displaying items 1 - 100 of 544