Campylobacter fetus subespécie fetus: abortamento e natimortalidade em ovinos

Abstract

ICampylobacter fetus subespécie fetus: abortamento e natimortalidade em ovinos

Campylobacter isolation from the feces of sheep with a history of reproductive disorders bred in the state of São Paulo, Brazil

“…However, no association was observed between infection and abortion, presenting a different picture from that reported in countries like New Zealand (QUINLIVAN;JOOP, 1982;BIRD et al, 1984;MANNERING et al, 2006), where prophylactic measures such as vaccination have been observed to decrease cases of miscarriage (BIRD et al, 1984;FENWICK et al, 2000;MANNERING et al, 2004). This measure has not yet been adopted in Brazilian herds because abortions occur sporadically in sheep (VARGAS et al, 2005;GRESSLER et al, 2012). In United States, was discovered the highly virulent C. jejune clone (clone SA, for sheep abortion) as the predominant cause of Campylobacter-associated abortion in sheep, all isolates were resistant to tetracycline, is quite intriguing and suggests that the clone is ecologically well adapted and pathologically hypervirulent in ruminants (SAHIN et al, 2008).…”

“…While Campylobacter jejuni and Campylobacter fetus subspecies fetus have been isolated in cases of abortions in Brazil (VARGAS et al, 2005;GRESSLER et al, 2012), these bacteria represent a major cause of abortions in countries like New Zealand with high rates of fetal isolates (BIRD et al, 1984;QUINLIVAN;JOOP, 1982). Even vaccinated animals may have reproductive problems because the bacterium exhibits high variability within the herd, and the immunization is not effective against all strains capable of causing abortions (COLLINS;DELONG et al, 1996;FENWICK et al, 2000).…”

“…Campylobacteriosis in sheep are characterized by abortion in the last trimester of gestation, stillbirth, the birth of premature and weak lambs, and occasionally the death of ewes due to metritis (DENNIS, 1975;HEDSTROM et al, 1987;SAHIN et al, 2008;GRESSLER et al, 2012) and of lambs due to diarrhea and/or gastroenteritis (STANSFIELD et al, 1986). Many sheep have diarrhea before the first episode of abortion, and diarrhea occurs in approximately 10% of the herd (WALT, 1994).…”

Campylobacter fetus em bovinos no estado do Rio Grande do Sul

“…When the results were analyzed in relation to its origin, 6.5% (6/92) (SMIBERT, 1978). Desde então, as duas subespécies foram descritas, ambas relacionadas à infertilidade sexualmente transmissível em bovinos e ovinos, e também a abortos esporádicos em vacas e ovelhas, responsável por prejuízos econômicos (SKIRROW, 1994;CALDOW & TAYLOR, 1997;CAMPERO et al, 2005;GRESSLER et al, 2012). A infecção geralmente ocasiona doença subclínica, resultando em aumento no intervalo entre partos, que, muitas vezes, passa despercebida na maioria dos estabelecimentos de criação.…”

Ocorrência de ovinos portadores da infecção por Campylobacter spp. no estado de Pernambuco

“…Pouco ainda se tem estudado em relação à dinâmica da infecção por Campylobacter spp. em ovinos e os fatores de risco associados, com apenas dois relatos de casos da infecção em animais no Rio Grande do Sul (Vargas et al 2005, Gressler et al 2012.) e um estudo no estado de São Paulo (Rizzo et al 2015).…”