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- Title
Sheep infection by caprine lentivirus.
- Authors
SOUZA, Thiago Sampaio de; PINHEIRO, Raymundo Rizaldo; LIMA, Carla Caroline Valença de; BRITO, Roberta Lomonte Lemos de; AZEVEDO, Dalva Alana Aragão de; DIAS, Ronaldo Pereira; SANTOS, Vanderlan Warlington Souza dos; ANDRIOLI, Alice; COSTA, Joselito Nunes
- Abstract
The objective of this study was to demonstrate iatrogenic transmission of small ruminant lentivirus (SRLV) from goats to sheep and horizontal transmission between sheep. The study was conducted on a farm with separate goat and sheep rearing, and animals were monitored for lentivirus occurrence by clinical examination and testing by immunoblotting (IB), agar gel immunodiffusion (AGID), and nested polymerase chain reaction (nPCR). Positive results had not been observed in the sheep flock until this study. Conversely, virus positive dairy goats were known. For this reason, the farm performed the caprine arthritis-encephalitis (CAE) control program. The study was designed with a sheep group that presented positive animals for SRLV by nPCR. It was verified that three newborn animals in this group were rejected by their mothers and consequently received milk from the goat herd. These three animals remained with another 20 sheep of the same age, totaling 23 animals. After one year, during monitoring, 11 of the 23 animals in the group presented positive results in the nPCR and three demonstrated seroconversion by IB. Of the animals that had received goat milk, two had positive results in the nPCR and IB. The 11 animals positive in the nPCR were followed and it was verified that five animals did not present further positive results in the nPCR, nor seroconversion; two continued presenting positive results in the nPCR but were negative in the IB and AGID and four were positive in the nPCR, IB, and AGID. Thus, it was possible to demonstrate iatrogenic interspecific infection and the occurrence of horizontal caprine lentivirus transmission among sheep.
- Subjects
LENTIVIRUSES; ENZYME-linked immunosorbent assay; ARTHRITIS; MAEDI-visna disease; POLYMERASE chain reaction
- Publication
Revista Brasileira de Saúde e Produção Animal (RBSPA), 2018, Vol 19, Issue 3, p268
- ISSN
1519-9940
- Publication type
Article
- DOI
10.1590/S1519-99402018000300004