Two stocks of grass carp Ctenopharyngodon idella Val were collected from North, Mazandran and South, Khuzestan to compare some morphometric and meristic characters. The Khuzestan stocks were significantly greater in body length, intestine length and number of vertebrae than the Mazandran stocks (p<0.05). The body width, depth of Mazandran were higher but gill raker lower than another stock. The...

Gastrointestinal nematodes of small ruminants are one of the major causes of productivity loss.This study was carried out to determine the correlation between the prevalence, seasonal incidence and geographical distribution January 12, 2011of abomasal worm infection of native sheep in 3 different climatic zones of Iran, suitable for animal husbandry. From March 2008 to February 2009 the content...

Ornithobacterium rhinotracheale (ORT) is a bacterium associated with respiratory disease, growth retardation, decreased egg production and mortality in chickens and turkeys. The objective of this study was isolation, identification and evaluation of antimicrobial susceptibility of ORT bacterium in slaughtered broilers chicken flocks based on cultural and molecular tests in Khuzestan province, s...

In order to identify the species of Helicotylenchus Steiner, 1945 present in Iran, 497 soil and root samples were collected from the rhizosphere of different plants and localities throughout the country during 2009-2010. A new and several known species of Helicotylenchus were identified from the collected material. H. persiaensis sp. n. is characterized by its short tail (8-11 µm , c = 54.2-79....

Dear Editor, Beta Thalassemia major is a genetic disease with an autosomal recessive pattern and is differentiated by severe microcytic hypochromic hemolytic anemia with hepatosplenomegaly, ineffective erythropoiesis and bone marrow expansion. The β-globin (HBB) gene coding for β-chain expression is located on a 50 kb globin gene cluster on the short arm of chromosome 11, whose mutation mediate...