NDLI: Distribution of infectious bronchitis virus strains in different organs and evidence of vertical transmission in natural infection

Content Provider	Springer Nature Link
Author	Pereira, Claiton Gonçalves Saraiva, Giuliana Loreto Vidigal, Pedro Marcus Pereira Fietto, Juliana Lopes Rangel Bressan, Gustavo Costa Moreira, Maria Aparecida Scatamburlo Almeida, Márcia Rogéria Júnior, Abelardo Silva
Copyright Year	2016
Abstract	On the basis of partial sequencing of the infectious bronchitis virus (IBV) S1 gene, this study investigated the molecular diversity of the virus in two life periods of a batch of breeding hens at the field level. The chicks were vaccinated against IBV on the second day of life with the vaccine Ma5, but at the age of 18 days, they exhibited clinical signs and macroscopic lesions compatible with avian infectious bronchitis (IB). In the clinical disease stage, the Ma5 vaccine strain was detected in the trachea, lungs, and small intestine of the chicks, while IBV variants were detected in the bursa of Fabricius and kidneys. Subsequently, new samples were collected from the same batch at the end of the production cycle. In this phase, the Ma5 vaccine strain was detected in the kidneys, small intestine, and oviduct of the hens. However, a previously unidentified IBV variant was found in the cecal tonsils. Additionally, a fragment of viral RNA with that was completely identical to the corresponding region of the Ma5 vaccine was detected in the allantoic fluid of viable embryos from the hens under study after 18 days of incubation. These findings suggest that, in addition to the Ma5 vaccine, other strains of IBV variants can coexist, seeming to establish a chronic infection in the chickens, and that they can potentially be transmitted vertically. These results may assist in immunoprophylaxis control programs against IBV.
Starting Page	3355
Ending Page	3363
Page Count	9
File Format	PDF
ISSN	03048608
Journal	Archives of Virology
Volume Number	161
Issue Number	12
e-ISSN	14328798
Language	English
Publisher	Springer Vienna
Publisher Date	2016-09-01
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Virology Medical Microbiology Infectious Diseases
Content Type	Text
Resource Type	Article
Subject	Virology Medicine

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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