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Nine piglets, 2-5 months old and weighing 12-15 kg were infected percutaneously with 5000 to 6000 cercariae of Schistosoma japonicum. Three similar piglets which were not infected served as controls. Infected animals were necropsied at 5, 10, 30, 40, 59, 90, 120, 150 and 180 days post-infection (PI)...
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One-to-70-day-old specific-pathogen-free chickens were infected with rotaviruses isolated from chickens, turkeys, and pheasants. Chicks infected at 1 or 7 days of age remained largely free of infection: virus could be isolated from a few chicks of these ages, but virus antigen could not be detected ...
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Age-related susceptibility patterns of turkeys, broilers, and specific pathogen-free (SPF) White Leghorn chickens to experimentally induced infection with turkey or chicken rotavirus isolates were compared. The following determinants were evaluated: clinical signs, onset and duration of virus produc...
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Polymerase chain reaction (PCR) for detection of bovine herpesvirus-1 (BHV-1) was developed and optimized using 22 bp sense and 20 bp antisense primers in the thymidine kinase (TK) coding region. The amplification product is 183 bp long. The PCR optimization was done using BHV-1 tissue culture super...
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Antibody-induced conformational changes of proteins have been recently frequently suggested to explain a variety of observations. In spite of the fundamental importance of this phenomenon for both in vivo and in vitro antigen-antibody interactions, it is not generally accepted because of the lack of...
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We evaluated the effects of immunostimulation in the development of postweaning multisystemic wasting syndrome (PMWS) in 930 pigs 53 to 54 d old in a grower/finisher barn with a history of PMWS. The pigs were allocated to 5 treatment groups: 4 groups received a single intramuscular injection of Resp...
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This case report provides pathological and confirmatory diagnostic documentation of the first reported clinical epizootic of infectious pancreatic necrosis (IPN) in farmed rainbow trout, Oncorhynchus mykiss, from central Mexico. Both the gross and microscopic pathology were consistent with IPN. A vi...
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Two 18-month-old bovine herpesvirus 1 (BHV1)-seronegative bulls were inoculated experimentally with BHV1 via their prepuces. Semen collected at intervals was examined by optimised virus isolation, dot-blot hybridisation and the polymerase chain reaction (PCR) for detection of BHV1, and the infection...
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Finfish nodaviruses (betanodaviruses) can cause highly destructive infections in numerous species of farmed marine fish larvae and juveniles worldwide. The betanodavirus genome consists of two single-stranded positive-sense RNA molecules (RNA1 and RNA2). The virus can be classified into four genotyp...
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Two wild Canada geese (Branta canadensis) in an extremely emaciated state and with severe proventricular food impaction also had a nonsuppurative encephalomyelitis and ganglioneuritis. The condition in these two birds was morphologically similar to psittacine proventricular dilatation, a recently id...
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A primer pair was designed from the published nucleotide sequence of the coding region of the bovine herpesvirus 1 (BHV-1) thymidine kinase (tk) gene for use in detection of the virus by use of polymerase chain reaction (PCR) amplification of 12 BHV-1 strains (3 ATCC and 9 local isolates). A tk dele...
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Various age groups of turkeys, White Leghorn chickens, and broiler chickens were inoculated with turkey rotavirus strain Tu-2 or with chicken rotavirus Ch-2, and the development of rotavirus-induced lesions were evaluated macroscopically and microscopically (light microscopy and scanning electron mi...
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A herpesvirus antigenically related to equine herpesvirus type 1 (EHV-1) was cultured from the brain of a 2-year-old camel that exhibited clinical signs of severe neurological disease before death. Microscopic lesions in the brain included a non-suppurative meningoencephalitis with vasculitis and lo...
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Rotaviruses were isolated from intestinal contents obtained from flocks of turkey poults and pheasant poults with diarrhea and from different age groups of chickens showing various signs of intestinal disorders. The incorporation of 5 micrograms trypsin/ml in the inoculum and medium was essential fo...
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Swine hepatitis E virus is a newly identified potentially zoonotic virus from pigs of particular concern for possible direct transmission to a human xenotransplant recipient by organ transplantation. In the present study, prevalence of serum antibodies to hepatitis E virus was examined in Canadian s...
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Bovine semen samples spiked with bovine herpesvirus 1 (BHV-1) were used to compare dot blot hybridization, polymerase chain reaction (PCR), and virus isolation for detection of BHV-1 in bovine semen. The PCR amplification used primers targeting the BHV-1 thymidine kinase gene and a nucleic acid rele...
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