|
|
| (3 intermediate revisions by the same user not shown) |
| Line 1: |
Line 1: |
| − | *Ovine enzootic abortion
| + | #redirect[[Enzootic Abortion of Ewes]] |
| − | *Especially in intensive systems
| + | |
| − | *Ewe lambs may acquire infection at birth and abort in their first pregnancy
| + | [[Category:Chlamydophila_species]][[Category:Sheep Bacteria]][[Category:Cattle Bacteria]][[Category:Goat Bacteria]][[Category:Pig Bacteria]][[Category:Zoonoses]] |
| − | *Pathogenesis:
| |
| − | **Infection via ingestion or inhalation causes a bacteraemia
| |
| − | **Bacteria localise in placenta and cause placentitis, leading to late abortion or premature weak lambs
| |
| − | **Necrosis of cotyledons and oedema of adjacent tissue, as well as dirty pink uterine discharge
| |
| − | **Aborted lambs well preserved
| |
| − | **Large numbers of chlamydiae shed in placenta and uterine discharges; survive in environment for several days
| |
| − | **Abortion rates may reach 30% in susceptible flock
| |
| − | **Ewes infected late in pregnancy may not abort, but may abort during the next pregnancy
| |
| − | **No other clinical signs in aborting ewes
| |
| − | **Fertility not impaired
| |
| − | *Transmission:
| |
| − | **Survival of elementary bodies in faeces and wild birds are a source of infection from one lambing season to the next
| |
| − | **Ewes may be carriers for several years
| |
| − | **Venereal transmission from infected rams
| |
| − | **Some immunity develops after infection, protecting ewes from subsequent disease
| |
| − | *Vaccination:
| |
| − | **Live attenuated vaccines prior to breeding or inactivated vaccines during pregnancy
| |
| − | **Vaccines prevent infection but will not clear infection from persistently-infected animals
| |
| − | **Vaccination of ewe lambs prior to breeding
| |
| − | *Treatment: long-acting oxytetracyclines during an outbreak to protect in-contact pregnant ewes
| |
| − | *Control: isolate aborted ewes; destroy placentas, thorough cleaning
| |
| − | *Also abortion in cattle, goats and pigs
| |
| − | *Serious infection in pregnant women[[Category:Chlamydophila_species]][[Category:Sheep]][[Category:Cattle]][[Category:Goat]][[Category:Pig]][[Category:Zoonoses]]
| |
| − | [[Category:To_Do_-_Bacteria]]
| |