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Chlamydia and Chlamydophila species (view source)
Revision as of 11:12, 18 May 2008
, 11:12, 18 May 2008no edit summary
*Manifestation varies from subclinical to severe systemic infections
*Manifestation varies from subclinical to severe systemic infections
*Intestinal infections often subclinical and persistent
*Intestinal infections often subclinical and persistent
*Human infections usualy acquired from infected birds, causing psittacosis or ornthosis, causing respiratory infections
*Human infections usualy acquired from infected birds, causing psittacosis or ornithosis, causing respiratory infections
*Causes notifiable psittacosis in birds
*Causes notifiable psittacosis in birds
*Epidemiology:
**Many wild and domestic birds susceptible
**Organisms present in respiratory secretions and faeces of infected birds
**Infection via inhalation or ingestion
**Subclinical infection common
**Intermittent shedding for prolonged periods
**Stress precipitates disease outbreaks
*Clinical signs:
**Generalised infection affecting intestinal and respiratory tracts
**Up to 10 day incubation period
**Loss of condtion, oculonasal discahrge, diarrhoea and respiratory distress depending on strain
**Hepatomegaly, airsacculitis and peritonitis
*Diagnosis: stained smears, immunohistochemistry, ELISA, PCR, isolation, antibody detection by ELISA and complement fixation
*Treatment: tetracyclines for several weeks
*Control: quaranteen imported birds and give tetracyclines; good husbandry
*Zoonotic by aerosol infection - can cause systemic disease with pneumonia, meningitis or meningoencephalitis
===''Chlamydophila pecorum''===
===''Chlamydophila pecorum''===
*Common inapparent intestinal infection of cattle
*Common intestinal infection of cattle
*Conjunctivitis and arthritis
*Sporadic bovine encephalomyelitis:
*Sporadic bovine encephalomyelitis:
**Usually in cattle under 3 years
**Usually in cattle under 3 years
**Vacular damage in brain
**Vacular damage in brain
**Serofibrinious peritonitis
**Serofibrinious peritonitis
**Treat with high doses tetracyclines and tylosin
===Diagnosis===
===Diagnosis===