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Vet Immunol Immunopathol. 2001 Aug 30;81(1-2):37-44.

Changes in peripheral blood leukocyte populations in pigs with natural postweaning multisystemic wasting syndrome (PMWS).

Author information

1
Departament de Sanitat i Anatomia Animals, Centre de Recerca en Sanitat Animal, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain. joaquim.segales@uab.es

Abstract

The objective of the present study was to analyze, by flow cytometry, changes in PBMC subsets in pigs having postweaning multisystemic wasting syndrome (PMWS), a new condition associated to porcine circovirus type 2 (PCV2) infection. Thirteen acutely PMWS affected pigs were selected from a farm seronegative to porcine reproductive and respiratory syndrome virus (PRRSV) and to Aujeszky's disease virus (ADV); 11 clinically healthy pigs were selected from a high health farm with no history of PMWS and free of the major swine pathogens, and used as a control group. All pigs were necropsied, and tissue samples were fixed in formalin; blood with EDTA anticoagulant was used to perform the flow cytometric analysis. PBMC were incubated with mAb against porcine CD3, CD4, CD8, CD25, CD45, IgM, SWC3, and SLA-Class II. Flow cytometric analysis showed substantial changes in leukocyte subsets in the peripheral blood of PMWS-affected pigs, which were characterized by an increase of monocytes, a reduction of T (mainly CD4(+)) and B-lymphocytes, and the presence of low-density immature granulocytes. Altogether, these changes would suggest an inability of acutely PMWS-affected pigs to mount an effective immune response.

PMID:
11498245
DOI:
10.1016/s0165-2427(01)00326-9
[Indexed for MEDLINE]

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