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   

Reserves of efficiency and quality]     

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

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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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Virus seeks its disease: a seroepizootiological study of the presence of bovine herpes mammillitis in Switzerland]     

M Engels  A Metzler  R Wyler 《Schweizer Archiv für Tierheilkunde》1979,121(11):565-576

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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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Investigation on the transfer of fleas among small mammals using radioactive phosphorus.     

P R?dl 《Folia parasitologica》1979,26(3):265-274

The transfer of fleas Megabothris turbidus, Ctenophthalmus agyrtes, Nosopsyllus fasciatus etc. was investigated by labelling the bank vole (Clethrionomys glareolus Schreb.) with radioactive phosphorus. On the one hand, the process of flea transfer was traced among different individuals of the same host species, and on the other, among different host species (C. glareolus, Apodemus flavicollis Melch.). The investigations revealed that the flea transfer in a rodent nest visited by another host depended partly on the number of fleas present in the nest, partly on the period spent by the new-comer in it. Conversely, the number of fleas transferred in the nest by the newly arrived host depended on the temperature of nest bedding and on the initial nest occupation by other host.  相似文献   

Scanning electron microscopic studies on males of trichinella species     

V Barus  F Tenora  R Wiger  T Genov  S Komandarev 《Folia parasitologica》1979,26(2):97-101

Ultrastructure of the cuticle and pseudobursa of adult males of four species of Trichinella has been studied by SEM. T. nativa differs markedly from T. spiralis, T. nelsoni and Trichinella sp. in the form of the pseudobursa. Trichinella sp. differs only slightly from T. spiralis and T. nelsoni. The ultrastructure of the cuticle revealed no characters suitable for the differentiation of the taxons under study.  相似文献   

Prevalence of antibodies to equine viruses in the Netherlands     

de Boer GF  Osterhaus AD  van Oirschot JT  Wemmenhove R 《The Veterinary quarterly》1979,1(2):65-74

Summary The prevalence of antibodies to various viruses was investigated in a series of serum samples collected from horses in the Netherlands between 1963 and 1966 and from 1972 onwards. Neutralizing antibodies to equine rhinopneumonitis virus, equine arteritis virus and to equine rhinovirus types 1 and 2 were detected in respectively 76%, 14%, 66% and 59% of the equine serum samples tested. The observed incidence of serum samples positive to equine adenovirus in the complement fixation test was 39%. Precipitating antibodies to equine infectious anaemia virus were detected only in serum samples from two horses imported from abroad. Haemagglutination inhibiting antibodies to Myxovirus influenzae A / equi-1, M. Influenzae A / equi-2, and Reovirus types 1, 2, and 3 were present in respectively 82%, 50%, 10%, 33% and 3.6% of the serum samples tested. The most frequently observed incidence of antibodies to the various equine respiratory viruses occurred in the groups of horses having repeatedly contact with other horses.  相似文献