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Evaluation of the specificity of Pasteurella multocida somatic antigen-typing antisera prepared in chickens, using ribosome-lipopolysaccharide complexes as inocula.
1989
Rimler R.B. | Angus R.D. | Phillips M.
Purified lipopolysaccharides (LPS) from 16 serotypes of Pasteurella multocida were complexed with Aspergillus fumigatus ribosomes. The complexes were used as inocula to prepare antisera, in chickens, for somatic antigen typing by the gel diffusion precipitin test (GDPT). Antisera made against 15 of 16 LPS reacted with their respective specific heat-stable antigens in the GDPT and homologous LPS in the passive hemagglutination test. Antisera could not be made against serotype 15 LPS. Correlation was not observed between intensity of the precipitin reaction in the GDPT and titer to homologous LPS in the passive hemagglutination test. Most antisera cross-related with other heat-stable antigens of other serotypes in the GDPT. Many of these cross-reactions were eliminated by dilution. Cross-reactions that occurred in the GDPT with antisera made against LPS of serotypes 2, 5, 7 and 8 could not be eliminated by dilution.
Mostrar más [+] Menos [-]Mucormycosis in a group of chickens
1989
Cheong, K.S. (Yongdong Branch of Veterinary Research Inst., (Korea R.)) | Rim, B.M. (Chonbug National Univ., Chonju (Korea R.). Coll. of Veterinary Medicine)
The etiologic agents of mucormycosis are several nonpathogenic fungi of the order Mucorales and are ubiquitous. A total of 82 chickens were infected with the disease and developed anorexia, diarrhea, malnutrition, dyspnea, and paralysis in a chicken farm, Sokcho, Kwangwon. At necropsy there were multiple nodular lesions and hemorrhages in livers, spleens, kidneys, gastro intestinal track, and respiratory system. On histopathological examination it was found that the nodular lesions were consisted of granulomatous inflammation accompanying characteristic hyphae (4-24 micro wide) of the fungi
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