The present study was undertaken to test the efficacy of culture extracts of five Penicillium species viz. P. citrinum, P. digitatum, P. expansum, P. verrucosum and P. viridicatum against five different soilborne bacteria namely Salmonella gallinarum, Xenorhabdus luminescens, Xanthobacter autotrophicus, Acetobacter xylinum and Carnobacterium mobile. The species of Penicillum showed marked antib...

Most strains of Salmonellae have simple nutritional requirements and grow well, therefore, in simple media consisting of glucose, inorganic nitrogen, and mineral salts (Kauffmann, 1954). There are, however, a number of Salmonellae which are unable to synthesize certain essential vitamins and amino acids and these must be supplied in the culture medium. The need of Salmonella typhosa for tryptop...

A total of ten Salmonella Gallinarum strains in log-phase of growth isolated from internal organs of dead hens with acute fowl typhoid were investigated for potential virulence factors. The strains differed in their acid tolerance, bile salts and serum resistance. S. Gallinarum cells were 70% resistant just 1 h post challenge at pH 2.0 and 0% at 4 and 24 h. When surviving at pH 2.5 and 3.0 it w...

Microbiological contamination of eggs should be prevented in the poultry industry, as poultry is one of the major reservoirs of human Salmonella. ClO2 gas has been reported to be an effective disinfectant in various industry fields, particularly the food industry. The aims of this study were to evaluate the antimicrobial effect of chlorine dioxide gas on two strains of Salmonella inoculated ont...

AIM Salmonella is an important zoonotic pathogen responsible for animal and human diseases. The aim of the present study was to determine the prevalence and stereotyping of Salmonella isolates isolated from apparently healthy poultry. Furthermore, the clonal relatedness among the isolated Salmonella serovars was assessed. MATERIALS AND METHODS A total of 150 cloacal swab samples from apparent...

The role of the Salmonella Pathogenicity Islands (SPIs) in pathogenesis of Salmonella enterica Typhimurium infection in the chicken is poorly studied, while many studies have been completed in murine models. The Type VI Secretion System (T6SS) is a recently described protein secretion system in Gram-negative bacteria. The genus Salmonella contains five phylogenetically distinct T6SS encoded in ...

Salmonella enterica serovar Gallinarum is a fowl-adapted pathogen, causing typhoid fever in chickens. It has the same antigenic formula (1,9,12:--:--) as S. enterica serovar Pullorum, which is also adapted to fowl but causes pullorum disease (diarrhea). The close relatedness but distinct pathogeneses make this pair of fowl pathogens good models for studies of bacterial genomic evolution and the...

Introducción: La tifosis aviar y la pulorosis, enfermedades ocasionadas por Salmonella enterica subsp. serotipo Gallinarum biotipo Pullorum respectivamente, son responsables de una elevada mortalidad en aves corral generando grandes pérdidas económicas para los avicultores. Objetivo: Fortalecer detección agentes causales pulorosis mediante optimización técnicas moleculares, tales como PCR punto...