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The occurrence of listeriosis in 12 caged canaries is described where 50% of the birds, including the female and all of the offspring, died within 2 weeks without clinical signs. At necropsy, multifocal necrotizing and partly granulomatous hepatitis, splenitis, myocarditis, interstitial...
The objective of this work was to examine the impact of subclinical coccidial infection on commercial performance, expressed as a modified European Production Index, in broilers. Performance data, and litter and faecal samples, were collected from two independent observational surveys of...
We examined spike (S) gene sequences of the virus populations of four different commercial ArkDPI-derived infectious bronchitis coronavirus vaccines before and during a single passage in specific pathogen free chickens. We found different degrees of genetic heterogeneity among the four vaccines...
An adult free-living European robin ( Erithacus rubecula ) with a large, firm, subcutaneous mass on the pectoral muscle was examined. The bird was unable to fly and died spontaneously. Necropsy revealed a yellowish, bilobate mass almost completely replacing the pectoral muscles with extensive...
The Villegas-Glisson/University of Georgia (VG/GA) strain of Newcastle disease virus (NDV) isolated from the intestine of healthy turkeys has been proposed to replicate in the respiratory and intestinal tract of chickens. In the present study, the virus distribution, the mucosal and systemic...
In a recent study (Oldoni & Garc a, 2007), some field strains of infectious laryngotracheitis viruses (ILTV) were characterized as genotypically different (group VI) from ILT vaccine strains. The objective of this study was to evaluate the protection elicited by one chicken embryo origin (CEO)...
Two experiments in commercial broiler chickens vaccinated with herpesvirus of turkeys (HVT) and challenged with Marek's disease virus (MDV) investigated the effects of the vaccination-to-challenge interval (VCI) on vaccinal protection against Marek's disease, and the kinetics of MDV and HVT load...
The present study investigated the occurrence of anaerobic intestinal spirochaetes of the genus Brachyspira in laying hen flocks in Treviso province, north-eastern Italy, with respect to prevalence, spirochaete species present, disease associations and risk factors for colonization. A total of...
Coccidiosis is a widespread disease of considerable economic importance to the turkey industry, as is evident by the fact that many millions of dollars are spent annually on its control. Despite this, in recent years little research has been conducted on the causative organisms—protozoan...
Duck virus enteritis is an acute and contagious herpesvirus infection of duck, geese and swans with high morbidity and mortality. The kinetics of viral DNA loads and immunohistochemical localization of virulent duck enteritis virus, as well as histopathological examination in various tissues of...
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