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Abstract
Porcine cytomegalovirus (PCMV) causes rhinitis in both young and older pigs. The present study describes the detection and characterization of shedding profiles of PCMV in nine farrow-to-finish Brazilian swine herds. Tonsil swabs from sows, nursery and grow-finish pigs of nine farrow-to-finish commercial herds (n = 756) were evaluated for the presence of PCMV by PCR. The virus was detected in all herds. Positive samples were concentrated in piglets of ages varying from 40 to 60 days (nursery phase), while none of the sows were positive for PCMV detection. These findings corroborate the literature regarding PCMV worldwide distribution, and introduce the first report of PCMV shedding profile in Brazilian pig farms.
Highlights
Porcine cytomegalovirus (PCMV) causes rhinitis in both young and older pigs
To enhance the knowledge of this virus in Brazilian herds, the present study describes the detection and characterization of shedding profiles of PCMV in nine farrow-to-finish Brazilian swine herds
Tonsil swabs were collected from commercial pig farms (A to I) in São Paulo State, southeast of Brazil (Figure 1)
Summary
Porcine cytomegalovirus (PCMV) causes rhinitis in both young and older pigs. The present study describes the detection and characterization of shedding profiles of PCMV in nine farrow-to-finish Brazilian swine herds. Methodology: Tonsil swabs from sows, nursery and grow-finish pigs of nine farrow-to-finish commercial herds (n = 756) were evaluated for the presence of PCMV by PCR. Positive samples were concentrated in piglets of ages varying from 40 to 60 days (nursery phase), while none of the sows were positive for PCMV detection. PCMV infection is usually subclinical in older pigs, but similar to the human cytomegalovirus, it can cross the placenta and often produces mummification, abortion, low viability of piglets at birth and consequential pre-weaning mortality [2]. Infection most commonly occurs perinatally or early postnatally in commercial herds, and the majority of pigs shed PMCV in nasal secretion between three and eight weeks of age [1]
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