Difference between revisions of "Chlamydophila abortus"
Jump to navigation
Jump to search
(Redirected page to Enzootic Abortion of Ewes) |
(Created page with '*Ovine enzootic abortion *Especially in intensive systems *Ewe lambs may acquire infection at birth and abort in their first pregnancy *Pathogenesis: **Infection via ingestion or…') |
||
| (4 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
| − | + | *Ovine enzootic abortion | |
| − | + | *Especially in intensive systems | |
| − | [[Category:Chlamydophila_species]][[Category:Sheep | + | *Ewe lambs may acquire infection at birth and abort in their first pregnancy |
| + | *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]] | ||
Revision as of 10:20, 12 May 2010
- Ovine enzootic abortion
- Especially in intensive systems
- Ewe lambs may acquire infection at birth and abort in their first pregnancy
- 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