Background: Avian infectious bronchitis (IB) is a highly contagious viral disease which affects the poultry industry. The virus exists in a wide variety of genotypes, and phylogenetic analysis has been used to classify infectious bronchitis virus (IBV) strains. Aims: The object of the study is a molecular characterization of circulating IBV in Afghanistan as a ...

The infectious bronchitis (IB) is divesting diseases of poultry. Hence, this study determined the maternally derived antibody (MDA) titer IBV and comparison two IB vaccine in layer. A total 1600 birds were equally allocated into groups (group-A group-B). group-A group-B vaccinated by different vaccines having strain “B1-Strain ND+Massachusetts B-41 Strains IBV” “Hitchner-B1 Strain H120 respecti...

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...

Newcastle disease (ND) and infectious bursal (IBD) are both one of the most economically important diseases, which cause high infection rate mortality chickens restrict development poultry industry. Currently, vaccination is effective method to prevent ND IBD. In this study, biological adjuvant bivalent vaccine (rClone30-VP2L-chGM-CSF) was developed for preventing Furthermore, immune protective...

Background and Aim: QX-like infectious bronchitis virus (IBV) is a highly avian coronavirus that causes respiratory kidney disease. It linked to increased mortality loss of performance in infected chickens worldwide, including Thailand. Thus, simple rapid diagnostic method for the diagnosis IBV needed. This study aimed develop single-step multiplex reverse transcription-polymerase chain reactio...

Mucosal surface provide portal entry for a majority of infectious agents. Hence, protection at the mucosal surface through immunization plays an important role in containing its systemic spread. Mucosal vaccination of chicken at early stages of life with live attenuated strain of Newcastle disease virus (NDV) induces both cellular and humoral immune responses against the Newcastle disease. In o...

A Newcastle disease virus (NDV) outbreak in chickens was reported in the Dominican Republic in 2008. The complete genome of this isolate, chicken/DominicanRepublic(JuanLopez)/499-31/2008 (NDV-DR499-31/08), and the fusion proteins of three other related viruses from the Dominican Republic and Mexico were sequenced and phylogenetically analyzed. Genetically, these four isolates were highly distin...

Avian influenza viruses of the H5 and H7 hemagglutinin subtypes, and Newcastle disease virus (NDV), are important pathogens in poultry worldwide. Specifically, the highly pathogenic H5N1 avian influenza virus is a particular threat because it has now occurred in more than 40 countries on several continents. Inasmuch as most chickens worldwide are vaccinated with a live NDV vaccine, we embarked ...

AIM The present research work was carried out to study the patho-epidemiological aspects of Genotype-XIII Newcastle disease virus (NDV) infection in commercial layer in and around Anand, Gujarat. As the outbreaks have reported in vaccinated flocks, it was felt necessary to study the disease with respect to its changing pathogenicity and relevant aspects. MATERIALS AND METHODS The study compri...

Hens were vaccinated during the rearing phase with infectious bronchitis virus (IBV) vaccines commercially available in Australia (Vic S and A3) or left unvaccinated and then challenged with the N1/88 strain of IBV at 30 wk of age. Oviduct and fecal samples were collected at regular intervals after N1/88 challenge. A locked nucleic acid probe-based reverse transcription real-time PCR test was d...