john`s disease, is an important disease in cattle which the causative agent is mycobacterium avium subsp. paratuberculosis. economic losses, elimination of reactor cattle, high expenses of disease control and causing crohn disease in human made the study of disease more important. knowing the involved area, focal points of disease would be effective to prevent disease. there are several methods...

background and objectives: cattle dermatophytosis (syn. cattle ringworm), an important skin infection, has received major consideration not only for economical losses in the animal breeding industry but also in regards to its zoonotic transmission to humans. for effective control measures, it is important to determine the disease prevalence in cattle herds. materials and methods: to determine r...

conclusions the results of pcr-ribotyping indicate that no relationship exists between clinical and meat isolates. we therefore conclude that other sources than meat may function as a vector for ca-cdi. results the overall prevalence of c. difficile with two toxigenic genes including tcda and tcdb was estimated at 4.0%. c. difficile was detected in 2.8%, 2.1%, 3.6% and 6.2% of chopped beef, gro...

effects of culture medium containing hormonal compositions on phenotypic and chromosomal variations of sugarbeet cultured tissues were examined. experiments were carried out in different nacl levels. cytological studies were conducted on calli originated from suspension culture. hypocotyl of seven day old seedlings of the two diploid lines were cultured in ms medium containing hormonal composit...

Cellular and tissue activities highly depend on environmental pH. Murine lung tissue, when cultured properly in-vitro, is a potent producer of hematopoietic growth factors. We have studied the effect of pH on the production of hematopoietic growth factors and protein synthesis by the murine lung in-vitro. Various concentrations of NaHC03 were used to adjust the pH of the culture medium unde...

tuberculosis (tb) is one of the most important aids associated infectious diseases worldwide. it is a leading cause of illness and death among people with hiv/aids in resource-poor areas of the world. the annual incidence of tb among indigenous iranians stands at 14 cases per 100,000 inhabitants. this study aimed to identify mycobacterium infection among iranian hiv positive patients. two sputu...

During the period from August 1997 to March 1998, two thousand samples of cultured Penaeus semisulcatus postlarvae and subadults were collected from five hatcheries and 20 growout farms distributed in three provinces along the costs of Persian Gulf and the Oman Sea. Based on growth signs, LM and TEM histopathology, Hepatopancreatic Parvo-like Virus (HPV) were identified from the samples. The HP...