Infectious bursal disease (IBD) is an acute and highly contagious immunosuppressive viral disease of young chickens causing great economic loss to the poultry industry worldwide. The disease is caused by serotype 1 of IBD virus (IBDV) belonging to genus Avibirnavirus of family Birnaviridae. One of the most probable reasons for frequent vaccination failures is attributed to emergence of variant ...

The pectic enzymes produced in vitro by 8 isolates (5 Highly virulent and 3 Weakly virulent) of Fusarium oxysporum , were detected by spectrophotometry, and characterized by polyacrylamide gel electrophoresis with substrate-containing gels (zymogram). Analysis of the polygalacturonase (PG) isozyme banding patterns (zymogram) identified two distinct phenotypes among the isolates from chickpea (C...

Iransiflissi(n and scanniiing vlo-Ic n microm ollY wete used to study the phagocvtosis of virulent and avirulent strains of JLcgionella pneurnopiila. Tlhe interact ion between L. lincumnophila andl( peritoneal macrophages front normial guinea pigs or front animials that had survived infection was studied. The virulent strains survivedi and proliferated within the phagocyte after ingestion by ei...

The ganglia of rabbits infected with a relatively benign strain of herpesvirus (E-43) and challenged with either of two virulent neurotrophic strains (MP or McKrae) were found to be colonized only by the initial benign infecting strain. Primary infection with the E-43 strain resulted in milder disease when the animals were infected with MP or McKrae strains and also prevented colonization of th...

Newcastle disease virus (NDV) can cause severe disease in chickens. Although NDV vaccines exist, there are frequent reports of outbreaks in vaccinated chickens. During 2009-2010, despite intense vaccination, NDV caused major outbreaks among commercial poultry farms in Indonesia. These outbreaks raised concern regarding the protective immunity of current vaccines against circulating virulent str...

Streptococcus tigurinus is a new member of the Mitis group and is associated with infective endocarditis. Low and high virulent variants have been described. A search was made in the national reference collection of endocarditis isolates for S. tigurinus-like strains by sequencing housekeeping genes (16S rRNA-gene, gdh, groEL, sodA). The strains were further profiled by polymerase chain reactio...

Studies were conducted to determine a disease outbreak in 14 day old post-larvae of abalone (Haliotis diversicolor supertexta) which caused mass mortality in July 2010 in Shanwei, China. Twenty-nine bacterial strains were isolated from a sample pool of 10 diseased post-larval abalones on 2216E marine agar plates during a natural outbreak of the disease. Among them, a dominant isolate (referred ...

ABSTRACT We conducted a comparative analysis of the phenotypic and genotypic characteristics plague pathogen strains from 2.MED4 2.MED1 phylogroups, representing main subspecies medieval Yersinia pestis biovar found in foci Caspian Sea region, which were epidemically active 20th century. evaluated biochemical properties, nutritional requirements, plasmid profiles Y. within phylogroups biovar. d...