conclusions the results indicate that the rates of esbls are high in urine e. coli and k. pneumoniae isolates from tehran hospitals. also this study indicates that the urine isolates from male patients are significantly more resistant than the female isolates. materials and methods a total of 190 e. coli and k. pneumoniae isolates were collected from patients’ urine samples in hospitals from te...

amelogenesis imperfectas (ais) are clinically and genetically heterogeneous conditions characterized by a wide range of clinical features. these abnormalities of enamel formation are categorized into three main groups, hypoplastic, hypomaturation and hypocalcified with different modes of inheritance such as autosomal recessive (ar), autosomal dominant (ad) and x-lined recessive (xlr). in spite ...

background and objectives: shiga toxin-producing escherichia coli (stec) have emerged as human pathogens and con- tamination via animal origin has been a major public health concern. we compared the distribution of phylogenetic groups and prevalence of stx gene variants among the pathogenic strains of escherichia coli isolated from feces of diarrheatic calves in tehran suburb farms. materials a...

Heterosis describes a phenotypic phenomenon of hybrid superiority over its homozygous parents. It is a genetically intriguing phenomenon with great importance for food production. Also called hybrid-vigor, heterosis is created by non-additive effects of genes in a heterozygous hybrid made by crossing two distinct homozygous parents. Few models have been proposed to explain how the combination o...

background: non- tuberculous mycobacteria are environmental opportunistic pathogens that can be found in various terrestrial and aquatic habitats. there are an epidemiological links between species isolated in tap water and those isolated from patients. hsp65 gene has more variability in its sequences, compared to the some more conserved genes in ntm, for identification of mycobacteria to speci...

Diverse cellulolytic bacteria are essential for maintaining high lignocellulose degradation ability in biogas digesters. However, little was known about functional genes and gene clusters of dominant cellulolytic bacteria in biogas digesters. This is the foundation to understand lignocellulose degradation mechanisms of biogas digesters and apply these gene resource for optimizing biofuel produc...

OBJECTIVE Congenital hyperinsulinemic hypoglycemia is a group of genetic disorders of insulin secretion most commonly associated with inactivating mutations of the β-cell ATP-sensitive K(+) channel (K(ATP) channel) genes ABCC8 (SUR1) and KCNJ11 (Kir6.2). Recessive mutations of these genes cause hyperinsulinism that is unresponsive to treatment with diazoxide, a channel agonist. Dominant K(ATP) ...