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*Ovine enzootic abortion
 
*Ovine enzootic abortion
 
*Especially in intensive systems
 
*Especially in intensive systems
*Ewe lambs may acquire infection at birth, and abort in their first pregnancy
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*Ewe lambs may acquire infection at birth and abort in their first pregnancy
 
*Infection via ingestion or inhalation causes a bacteraemia
 
*Infection via ingestion or inhalation causes a bacteraemia
 
*Bacteria localise in placenta and cause placentitis, leading to late abortion or premature weak lambs
 
*Bacteria localise in placenta and cause placentitis, leading to late abortion or premature weak lambs
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*Venereal transmission from infected rams
 
*Venereal transmission from infected rams
 
*Some immunity develops after infection, protecting ewes from subsequent disease
 
*Some immunity develops after infection, protecting ewes from subsequent disease
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*Live attenuated vaccines prior to breeding or inactivated vaccines during pregnancy
 
*Vaccines prevent infection but will not clear infection from persistently-infected animals
 
*Vaccines prevent infection but will not clear infection from persistently-infected animals
*Vaccination of ewe lambs
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*Vaccination of ewe lambs prior to breeding
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*Treatment: long-acting oxytetracyclines during an outbreak to protect in-contact pregnant ewes
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*Control: isolate aborted ewes; destroy placentas, thorough cleaning
 
*Also abortion in cattle, goats and pigs
 
*Also abortion in cattle, goats and pigs
 
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*Serious infection in pregnant women
     
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