increased susceptibility of birds to avian pathogens in intensive husbandry system has emphasized on necessity of improvement of innate and specific immune responses of birds by the fast establishment of a beneficial microflora and immune stimulator factors to guarantee healthy and low-price products. during this study, 192 one-day-old broiler chicks (ross-380) in four groups with three replica...

Infectious bronchitis is an acute viral disease with high contagious and mortality among chicks. The aim of this study was to survey of relation between ascites syndrome incidence and infectious bronchitis in broiler chickens by ELISA method in Iran. Eight Ross strain broiler farm affected by infectious bronchitis were selected in this study. Blood samples were gathered early stages of disease ...

nucleocapsid (n) protein of infectious bronchitis virus (ibv), one of the viral structural proteins, inducesstrong antibody response in natural infection. in this study, a simple, recombinant n protein-based dot-blottest was developed to serologically examine chicken serum samples for the presence of ibv antibody.initially, 72 serum samples were tested for the presence of ibv antibody using a c...

in order to identify predominant circulating types of infectious bronchitis(ib) virus in the period of 1999-2004 in iran, samples(trachea, lung, kidney) from 150 various flocks showing respiratory signs suspected to be related to ib infection were inoculated to spf eggs. then allantoic fluids studied by rt-pcr and nested pcr using group and type specific primers to probing massachusset, 793/b a...

objective: garlic is a plant has been used as a flavor, and anti-microbial and anti-diarrheal agent. infectious bronchitis virus (ibv) is a coronavirus. the available vaccines against ibv cannot cover new variants. this study evaluated the inhibitory effects of garlic extract on ibv.  materials and methods: the constituents of garlic extract were detected by gas chromatography. this study was d...

avian infectious bronchitis (ib) is a major cause of economic losses in poultry industry. the ib virus primarily affects respiratory tract, but various strains differ in their tropism for other target organs such as kidney and alimentary tract. the objective of this study was to estimate the pathogenicity of iranian ibv variant (ir-1), which is limited exclusively to iran. specific pathogen fre...

avian infectious bronchitis (ib), caused by a gammacoronavirus, is an oie-listed (list b) disease and characterized by respiratory and renal involvements, causing high mortality, and economic loss in both layers and broilers. in comparison with other diagnostic methods, real-time polymerase chain reaction (rt-pcr) and conventional rt-pcr are potent, more sensitive and faster techniques for infe...

avian infectious bronchitis (ib) is a widely distributed poultry disease that has huge economic impact on poultry industry. the continuous emergence of new ibv genotypes and lack of cross protection among different ibv genotypes have been an important challenge. the present study was done to evaluate protection caused by two different serotypes’ vaccines (massachusetts & 793/b) in order to eval...

infectious bronchitis virus (ibv) belongs to the group of gamma coronaviruses along with other avian coronaviruses. the disease caused by ibv can appear similar to infectious laryngotracheitis, avian influenza, and velogenic newcastle disease, which are high priority diseases. the clinical signs can be accompanied by mortalities in broiler chickens and reduced eggshell and albumin quality in la...