Brown, Justin D Dunn, Patricia Wallner-Pendleton, Eva Kariyawasam, Subhashinie Schriner, Timothy Hofacre, Charles Johnson, Joshua Boyd, Robert
Published in
Avian diseases
Avian cholera is a significant disease of domestic and wild birds caused by the bacterium Pasteurella multocida (PM). In poultry, a major source of PM infection is chronic carriers, domestic birds that have become infected and recovered or had subclinical infections. Although outbreaks of avian cholera in ring-necked pheasants (Phasianus colchicus)...
Carnaccini, S Shivaprasad, H L Cutler, G Bland, M Meng, X J Kenney, S P Bickford, A A Cooper, G Charlton, B Sentíes-Cué, C G
...
Published in
Avian diseases
Between April 2013 and April 2015, seven flocks belonging to three different major commercial egg producers inCalifornia experienced a mild increase in mortality 2 to 3 wk after administration of Salmonella Enteritidis bacterins. Strains of chickens involved were H&N (flock A1, A2, B2, C1, C2, and C3) and Lohmann white (flock B1). Vaccination was a...
Morales-Erasto, V Falconi-Agapito, F Luna-Galaz, G A Saravia, L E Montalvan-Avalos, A Soriano-Vargas E, E Fernández-Díaz, M
Published in
Avian diseases
The coinfection of Avibacterium paragallinarum and Ornithobacterium rhinotracheale in two outbreaks of infectious coryza from Peru is reported. The diagnosis was confirmed by bacteriologic isolation, PCR testing, and sequencing of the 16S rRNA gene. The susceptibility of the isolates to 12 antimicrobial agents was tested by a disk diffusion method....
Kajlich, Anya S Shivaprasad, H L Trampel, Darrell W Hill, Ashley E Parsons, Rebecca L Millman, Suzanne T Mench, Joy A
Published in
Avian diseases
The egg industry is moving away from the use of conventional cages to enriched cage and noncage laying hen housing systems because of animal welfare concerns. In this study, the prevalence and severity of lesions in noncage laying hens from commercial farms in two of the largest egg-producing states, California and Iowa, were evaluated by postmorte...
Khordadmehr, M Ashrafi-Helana, J Madadi, M S Jarolmasjed, S H
Published in
Avian diseases
The subgroup J avian leukosis virus favors the myelocytic series cells and causes myeloid leukosis (myeloblastosis and myelocytomatosis). Natural cases of myeloblastosis (myeloblastic myeloid leukosis) are uncommon and usually occur in adult chickens. This paper describes clinical signs and gross and histopathologic features of myeloblastosis in an...
Sá e Silva, Mariana Rissi, Daniel R Swayne, David E
Published in
Avian diseases
Infectious bursal disease virus (IBDV) is an important pathogen of chickens causing negative economic impacts in poultry industries worldwide. IBDV has a variable range of virulence, with very virulent (vvIBDV) strains being responsible for the greatest losses from mortality and decreased performance. Previous vvIBDV studies using conventional broi...
M'Sadeq, Shawkat A Wu, Shu-Biao Choct, Mingan Swick, Robert A
Published in
Avian diseases
Necrotic enteritis (NE) in poultry is the most important bacterial disease in terms of economic losses. The present study was conducted to evaluate the effect of an experimental challenge with necrotic enteritis on respiration and heat production in birds pretreated with dietary acylated starch or antibiotics (AB) zinc bacitracin (50 mg/kg) plus sa...
Barreda, Celina Buscaglia
Published in
Avian diseases
Values from an ELISA for evaluating the immune response induced by a commercial vaccine against fowlpox virus and the lesion at the site of inoculation (i.e., swelling of the skin or a pox where the vaccine was applied) were compared. The ELISA was carried out with an antigen prepared by precipitation of a cell culture-propagated virus suspension w...
Sato, Yuko Wigle, William L Gallagher, Susan Johnson, Amy L Sweeney, Raymond W Wakenell, Patricia S
Published in
Avian diseases
This report describes an outbreak of type C botulism in two organic, free-range commercial layer farms in the Midwest. Hens affected were 64-wk-old Hy-Line brown hens and 34-wk-old Hy-Line brown hens owned by the same company, but housed on different premises, with approximately 20,000 birds per house. Mortality over the 2 wk of investigation was e...
Heidemann Olsen, Rikke Bisgaard, Magne Christensen, Jens Peter Kabell, Susanne Christensen, Henrik
Published in
Avian diseases
Outbreaks of salpingitis and peritonitis cause major economic losses due to high mortality, reduced egg-production, and culling. The aim of the present study was to characterize, in detail, lesions associated with increased mortality in layers due to avianpathogenic Escherichia coli (APEC) and to investigate the population structure of the E. coli ...
