boophilus genus ticks are responsible for transferring some pathogens and reducing production factors in cattle. tropomysin (tpm) protein has actin regulator activity and playing important role in immune and allergic reactions. the main goal is to determine different aspects of phylogenetic, similarity, homology, structure and allergenicity of tpm protein. in prior study, we identified tpm by u...

the aim of the present study was to find the best or optimum topology of six chicken populations, which were genotyped based on nine highly polymorphic microsatellite markers. to reach this goal, different genetic distances based on infinite allele model (iam), stepwise mutation model (smm) and drawing phylogentic trees on un-weighted pair-group method using arithmetic averages (upgma) method w...

sixteen avian influenza (ai) h9n2 viruses were isolated from disease outbreaks in different parts of iranduring (1998–2001). these ai isolates were used for pathogenicity, haemagglutinin (ha) gene variation andphylogenetic analysis. results in both pathogenicity tests and ha gene cleavage site sequence detectionrepresented a non-highly pathogenic feature for all iranian ai isolates studied. the...

barley belongs to the poaceae which is the largest monocotyledon family. plastid single-copy gene acetyl-coa carboxylase (accase) is the first step in the biosynthesis of fatty acids and therefore, it is used to study the phylogenetic relationships, evolutionary and systematic of grasses. in this study, for the first time, phylogenetic relationship of eight species of hordeum genus from iran in...

background and aims: hemagglutinin (ha) protein of avian influenza (ai) plays an essential role in the virus pathogenicity. ai h9n2 subtype causes significant economic loss in broiler and layer in poultry farms in iran. ai viruses have a great involvement in evolutionary changes at nucleotide and amino acid levels and vaccines could induce faster rates of such changes. up-dated understanding of...

conclusions overall, results of present study were consistent with the data reported earlier base on 5’ ntr in iranian isolates and revealed genotype ir2 is major genotype in iranian hgv-positive patient. it means there are higher similarities between iranian and europe-usa in hgv ns3 gene. results nucleotide blast results emphasized that most similar sequences to ir ns3 sequences were those fr...

conclusions the prevalence of b. hominis in the study area was lower than that reported for most developed countries, and unlike in other countries in the middle east, st4 was the most prevalent subtype. results blastocystis hominis was found to have a prevalence of 3.33% in the study population. there was no significant association of blastocystis infection with age (p = 0.3) or gender (p = 0....

background: canine distemper (cd) is a lethal systemicdisease affecting a wide variety of terrestrial carnivores.objectives: this study was performed to survey epidemiologicaland molecular characteristics of the canine distemper virus(cdv) strains circulating in iran. methods: in this study, 19cdv-suspected unvaccinated dogs from northeast and center ofiran were analyzed for presence of cdv nuc...

waterborne outbreaks of pathogenic bacteria from contaminated water are serious threats forpublic health. coliform bacteria have been regarded as one of the most important indicators for monitoringpathogenic bacteria. to address potential pathogenic bacterial outbreaks, the distribution and diversity ofcoliform bacteria in jiahe river, which flows through densely-populated urban area in china, ...