Abstract
Enzoötische abortus veroorzaakt door Chlamydia (C.) abortus is nog steeds de meest voorkomende oorzaak van reproductiestoornissen bij schapen. Bij runderen wordt C. abortus geassocieerd met infecties van het geslachtsstelsel en mastitis. In de voorliggende studie werden Belgische schapen (n=958), geiten (n=48) en runderen (n=1849) onderzocht aan de hand van de ID ScreenTM Chlamydia abortus indirecte multispecies antistof ELISA. Bij de schapen werd de hoogste prevalentie gevonden in Limburg (4,05%). De dieren van Antwerpen, Brabant en Luik waren negatief. De prevalentie in de overige vijf regio’s was laag (0,24% tot 2,74%). Van negen geitenboerderijen was slechts één bedrijf uit Luxemburg positief. Bij de runderen werd de hoogste seroprevalentie in Waals-Brabant (4,23%) gevonden. De dieren uit Limburg en Namen waren negatief. De prevalentie in de overige zeven regio’s varieerde van 0,39% tot 4,02%.
Highlights
Ruminants can become infected with Chlamydia (C.) abortus, C. pecorum, C. psittaci and rarely with C. suis (Reinhold et al, 2011)
Chlamydial strains from ruminant abortion were first classified as mammalian Chlamydia psittaci serotype 1, mammalian C. psittaci biovar 1 or C. psittaci outer membrane protein A gene type B577 strains (Kaltenboeck et al, 1993)
C. abortus is frequently isolated from ruminants and is responsible for abortion, infertility, keratoconjunctivitis, pneumonia, enteritis, mastitis and arthritis (Reinhold et al, 2011)
Summary
Ruminants can become infected with Chlamydia (C.) abortus, C. pecorum, C. psittaci and rarely with C. suis (Reinhold et al, 2011). Chlamydiaceae infections in cattle (Bos taurus) have been known to occur since 1940, when McNutt isolated intracellular organisms from cases of sporadic bovine encephalomyelitis in feedlot cattle (McNutt and Waller, 1940). Thereafter, a number of studies worldwide reported epizootic bovine abortion in cattle caused by C. abortus. The pathogen caused bovine mastitis, epididymitis and seminal vesiculitis, and was excreted in bull semen (Kaltenboeck et al, 2005; Reinhold et al, 2011). Chlamydial strains from ruminant abortion were first classified as mammalian Chlamydia psittaci serotype 1, mammalian C. psittaci biovar 1 or C. psittaci outer membrane protein A (ompA) gene type B577 strains (Kaltenboeck et al, 1993). The organism was reclassified as C. abortus (Everett et al, 1999)
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