Parechoviruses form one of the nine genera in the picornaviridae family, and include two human pathogens: Human parechovirus type1 and 2 (Hpev1 and Hpev2). The genome of picornaviruses encodes a single polyprotein, which undergoes a cleavage cascade performed by virus encoded proteases to give the final virus proteins. The primary cleavage occurs by 2A protein and this step is critical for vi...

Background: Bovine leukaemia virus (BLV) is the primary cause of enzootic bovine leukaemia which belongs to the HTLV/BLV group of oncogenic retroviruses including Human T-cell leukaemia virus types 1, 2, and 3 and simian T-lymphotropic virus. Due to daily consumption of milk, meat and other dairy by-products, a possible role in appearing human cancers can be assumed for BLV. Materials and Metho...

background and aims: considering difficulties in usual laboratory methods in detection of viral infections, improved dna-based diagnostic techniques are more reliable. loop mediated isothermal amplification method (lamp) is a nucleic acid amplification method that amplifies dna using six primers which has been developed to diagnose viruses as a rapid and high efficiency test. in this study, the...

Herpetic keratitis which is resulted from herpes simplex virus type I, is considered the most common cause of corneal blindness that needs being diagnosed and treated in order to prevent irreversible eye effects. The best method to diagnose it is molecular method which has high sensitivity and exclusivity. The current study was done on 25 eye samples collected from patients referred to the Feyz...

background and aims: influenza a virus infects birds and some mammalian including human. h1 and h3 subtypes are circulated in both human and birds’ population. to determine the prevalence of the mentioned subtypes in birds, different captive bird species in tehran zoo, and affiliated centers in tehran were investigated for virus infection. methods: in this study, between november 2008 and febru...

Herpetic keratitis which is resulted from herpes simplex virus type I, is considered the most common cause of corneal blindness that needs being diagnosed and treated in order to prevent irreversible eye effects. The best method to diagnose it is molecular method which has high sensitivity and exclusivity. The current study was done on 25 eye samples collected from patients referred to the Feyz...

Case Report: Some viruses have been reported to cause respiratory and gastroenteric infections simultaneously. In this case we present isolation of human respiratory virus (RSV) type B from diarrheal sample of a 12 months' child with acute gastroenteritis. Results: The results indicated the presence of RSV subtype B genome in all three stool samples. Moreover, no sign of co-infections with oth...

background: colorectal cancer is one of the most common malignancies worldwide with more than one million new cases. according to the ministry of health and medical education of iran, colorectal cancer is the third most common cancer in iran. many risk factors are known causes of this disease. however, the molecular mechanisms associated with colorectal cancer are still under investigation. rec...

herpes simplex virus type 1 establishes a latent infection in the peripheral nervous system following primary infection. during latent infection, virus genome exhibit limited transcription, with the hsv lats consistently detected in latency infected ganaglia. following ocular infection viral latency develops in the trigeminal ganglia. in this study pcr has been used for detection of hsv-1 nucli...