A simple technique to differentiate between animals infected with Yersinia enterocolitica IX and those infected with Brucella abortus.     

K R Mittal  I R Tizard 《Research in veterinary science》1979,26(2):248-250

While both Brucella abortus and Yersinia enterocolitica IX have O antigens in common, they differ significantly with respect to motility. Thus Br abortus is always non-motile while Y enterocolitica is motile when grown at room temperature. The presence of yersinia H agglutinins in serum can be shown to be evidence of previous exposure to Y enterocolitica. These agglutinins are not generated by brucella infection. A rapid H agglutination test will serve to provide this differentiation without interference from cross-reacting O antigens.  相似文献   

The susceptibility of chicken kidney and oviduct organ cultures to a vaccine strain of avian infectious bronchitis virus.     

R W Peters  J H Darbyshire  J K Cook 《Research in veterinary science》1979,26(1):38-40

The minimal infectious dose of the H52 strain of infectious bronchitis virus for organ cultures of oviduct and kidney was compared in chickens of different ages. Organ cultures of oviduct were found to be highly susceptible to infection regardless of the age of chicken and no difference in susceptibility could be demonstrated between cultures of the magnum and uterus regions of the mature oviduct. Kidney organ cultures were less susceptible and resistance to infection increased significantly (P less than 0.001) with the age of the chicken from which cultures were prepared.  相似文献   

Structure of the sheep epidermis.     

D H Lloyd  S F Amakiri  D M Jenkinson 《Research in veterinary science》1979,26(2):180-182

The stratum corneum measured on fresh frozen sections was found to be considerably thicker than previously reported. It was uniformly permeated with sebum, which also formed an intact film over the skin surface and it could readily be divided into two zones. The living epidermis was approximately half as thick as the stratum corneum.  相似文献   

Reserves of efficiency and quality]     

V S Krivonosov  A M Kravets  R R E?mats 《Veterinariia》1979,(8):17-20

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The blood volumes and erythrokinetics of Ndama and Zebu cattle experimentally infected with Trypanosoma brucei.     

J D Dargie  P K Murray  M Murray  W I McIntyre 《Research in veterinary science》1979,26(2):245-247

The responses of susceptible Ndama and Zebu cattle to experimental infection with Trypanosoma brucei were compared using haematological, parasitological and radioisotopic methods. Animals of both breeds became anaemic, but this was more severe in the Zebu cattle, one of which died. Although the prepatent period was the same in animals of both breeds, the levels of the first and subsequent peaks of parasitaemia were higher in the Zebu. The anaemia was due to an accelerated rate of red cell break-down which was more marked in the Zebu cattle. Haemodilution was not a feature. There was no evidence of dyshaemopoiesis but iron reutilisation from degraded erythrocytes was impaired. The greater resistance of the Ndama to T brucei infection could not be attributed to the capacity of this breed to mount a more effective erythropoietic response than the Zebu.  相似文献   

The effect of in vitro antibacterial properties of bovine milk diets on the natural colonisation of newborn piglets with coliform bacteria.     

S Stephens  M John  J E Cooper 《Research in veterinary science》1979,26(1):21-24

The diets suitable for the hand rearing of piglets in incubators were examined. Diet A was based on cows' milk heated to 56 degrees C and had bacteriostatic and antiadhesive properties against Escherichia coli. Diet B was based on evaporated cows' milk and did not have these properties. The numbers of coliform bacteria naturally colonising the small intestines of newborn piglets fed entirely on these diets for one week did not differ significantly, however both were significantly higher than in control piglets suckled from birth. Faecal counts of coliforms were similar in all three groups. Examination of the bacteriostatic sensitivity of the isolated strains to sows' milk indicated a predominance of milk-sensitive strains colonising the suckled piglets and a predominance of milk-resistant strains in the piglets fed diet B. This diet-dependent colonisation could not be explained by the in vitro bacteriostatic properties of the diets alone.  相似文献   

Serological study on the occurrence of bovine leukosis in Switzerland]     

F Steck  H Kupferschmied  W Leemann  R Kaderli  W Bommeli  P Gafner  H K Sp?rri 《Schweizer Archiv für Tierheilkunde》1979,121(9):439-450

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An in vitro study of the replication of Mycoplasma ovipneumoniae.     

R M Major  J K Clarke  M R Alley 《New Zealand veterinary journal》1979,27(4):58-61

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Leptospirosis in pigs: the effectiveness of streptomycin in stopping leptospiruria.     

R T Hodges  J Thomson  K G Townsend 《New Zealand veterinary journal》1979,27(6):124-126

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Herpesvirus of orang-utan (H. pongo) and search for retrovirus in nonhuman primates.     

S Rasheed  M B Gardner 《Comparative immunology, microbiology and infectious diseases》1979,2(2-3):265-274

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