Document Detail

Colostrum and milk can transmit jaagsiekte retrovirus to lambs.
MedLine Citation:
PMID:  18328646     Owner:  NLM     Status:  MEDLINE    
Ovine pulmonary adenocarcinoma (OPA) is a contagious disease caused by jaagsiekte sheep retrovirus (JSRV). In the three studies performed, we have obtained data of the importance of colostrum/milk (C/M) in the transmission of JSRV. In the first study, a group of sheep from a flock with a long history of OPA, samples from colostrum and peripheral blood leucocytes (PBLs) were collected. Two specific PCRs (U3-LTR and env of the JSRV) were carried out. Using U3PCR 8/34 sheep were positive in colostrum whereas with envPCR 7/34 were positive. From these animals only one was positive with U3PCR in the PBLs. Evidence of the transmission of JSRV infection by C/M was obtained in two more separate studies. In the second study, PBLs from five lambs from JSRV+ ewes and two from JSRV-ewes were tested by the U3PCR. They were fed C/M by their mothers during 3 months and slaughtered 7 months after birth. Three out of five lambs from the JSRV+ sheep become PBL positive at 3-4 months old and the other two were also positive at 4-6 months of age. One lamb of the JSRV-sheep became also PBL positive at an age of 3 months. In the third study, a group of lambs from JSRV negative mothers were fed with C/M from JSRV+ sheep and housed in separate unit. For comparison, another group of the same origin and maintained in another different unit, were fed with C/M containing a JSRV virus preparation. All lambs were blood sampled monthly and JSRV infection was detected as early as 15 days and several times onwards in both groups. Control groups fed with C/M from JSRV free flock and JSRV blood test negative sheep were always negative. Together these results indicate that suckling is an important natural transmission route for JSRV.
Elena Grego; Daniele De Meneghi; Vega Alvarez; Alfredo A Benito; Esmeralda Minguijón; Aurora Ortín; Mario Mattoni; Bernardino Moreno; Maider Pérez de Villarreal; Alberto Alberti; Maria Teresa Capucchio; Marco Caporale; Ramón Juste; Sergio Rosati; Marcelo De las Heras
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-02-07
Journal Detail:
Title:  Veterinary microbiology     Volume:  130     ISSN:  0378-1135     ISO Abbreviation:  Vet. Microbiol.     Publication Date:  2008 Aug 
Date Detail:
Created Date:  2008-07-21     Completed Date:  2008-10-28     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7705469     Medline TA:  Vet Microbiol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  247-57     Citation Subset:  IM    
Dipartimento di Produzioni Animali Epidemiologia ed Ecologia, Facoltà di Medicina Veterinaria, Università degli Studi di Torino, Grugliasco, Italy.
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MeSH Terms
Animal Feed
Colostrum / virology*
Diet / veterinary
Infant Formula
Infectious Disease Transmission, Vertical / veterinary*
Jaagsiekte sheep retrovirus*
Milk / virology*
Pulmonary Adenomatosis, Ovine / transmission*,  virology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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