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genomic fingerprinting of "haemophilus somnus" isolates by using a random-amplified polymorphic dna assay.the random-amplified polymorphic dna (rapd) assay was used to generate dna fingerprints for 16 isolates of "haemophilus somnus," and one isolate each of "haemophilus agni," "histophilus ovis," "actinobacillus seminis," pasteurella haemolytica, and escherichia coli. the rapd assay differentiated among "h. somnus" isolates, which shared similarity coefficients of 0.46 to 1.00 on the basis of pairwise comparisons of rapd markers produced with nine random decamer primers. three virulent encephalitic ...19938458944
diseases and pathogens associated with mortality in ontario beef feedlots.this study determined the prevalence of diseases and pathogens associated with mortality or severe morbidity in 72 ontario beef feedlots in calves that died or were euthanized within 60 days after arrival. routine pathologic and microbiologic investigations, as well as immunohistochemical staining for detection of bovine viral diarrhea virus (bvdv) antigen, were performed on 99 calves that died or were euthanized within 60 days after arrival. major disease conditions identified included fibrinos ...200616566254
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