ABSTRACT The selective effect of quantitative host resistance on pathogen aggressiveness is poorly understood. Because two previous experiments with a small number of bread wheat cultivars and isolates of Mycosphaerella graminicola had indicated that more susceptible hosts selected for more aggressive isolates, we conducted a larger experiment to test that hypothesis. In each of 2 years, six cu...

The objective of this study was to investigate the genotypic characteristics of Campylobacter isolates in Shiraz, Iran. A total of 40 Campylobacter isolates including 20 C. jejuni and 20 C. coli were recovered from both cattle and sheep faeces by cultivation methods. The isolates were identified on the basis of polymerase chain reaction (PCR) detection of 16SrRNA and multiplex PCR to determine ...

Black rot of Chinese cabbage caused by <i>Xanthomonas campestris</i> pv. <i>campestris</i> (<i>Xcc</i>) is one the most severe diseases in crop cultivation. To define resistance characteristics to <i>Xcc</i>, we tested virulence eight <i>Xcc</i> isolates four susceptible cultivars cabbage. The showed different on cultivars. On other ha...

during the period from 1996 to 1997, 45 isolates of leishmania were recovered frompatients suspected of cutaneous leishmaniasis (cl) and one from a gerbil. these specimens werereceived from various parts of iran. isoenzyme profiles of these isolates were compared with those ofreference strains of l.tropica, l.major and l.infantum using cellulose acetate electrophoresis (cae) and10 enzyme system...

the aim of this study was to determine antibiotic resistance genes, phylogenetic groups and anti-microbial resistance patterns of escherichia coli isolates from fecal samples of healthy pet cats in kerman city. ninety e. coli isolates were recovered from obtained rectal swabs. antibiotic resistance pattern of the isolates against seven selected antibiotic was determined using disc diffusion met...