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Chlamydia and Chlamydophila species (view source)

Revision as of 11:12, 18 May 2008

975 bytes added , 11:12, 18 May 2008

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*Manifestation varies from subclinical to severe systemic infections

*Intestinal infections often subclinical and persistent

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*Human infections usualy acquired from infected birds, causing psittacosis or ~~ornthosis~~, causing respiratory infections

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*Human infections usualy acquired from infected birds, causing psittacosis or ornithosis, causing respiratory infections

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*Causes notifiable psittacosis in birds

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*Epidemiology:

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**Many wild and domestic birds susceptible

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**Organisms present in respiratory secretions and faeces of infected birds

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**Infection via inhalation or ingestion

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**Subclinical infection common

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**Intermittent shedding for prolonged periods

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**Stress precipitates disease outbreaks

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*Clinical signs:

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**Generalised infection affecting intestinal and respiratory tracts

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**Up to 10 day incubation period

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**Loss of condtion, oculonasal discahrge, diarrhoea and respiratory distress depending on strain

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**Hepatomegaly, airsacculitis and peritonitis

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*Diagnosis: stained smears, immunohistochemistry, ELISA, PCR, isolation, antibody detection by ELISA and complement fixation

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*Treatment: tetracyclines for several weeks

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*Control: quaranteen imported birds and give tetracyclines; good husbandry

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*Zoonotic by aerosol infection - can cause systemic disease with pneumonia, meningitis or meningoencephalitis

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===''Chlamydophila pecorum''===

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*Neurological disease

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*Common inapparent intestinal infection of cattle

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*Common intestinal infection of cattle

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*Conjunctivitis and arthritis

*Sporadic bovine encephalomyelitis:

**Usually in cattle under 3 years

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**Vacular damage in brain

**Serofibrinious peritonitis

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**Treat with high doses tetracyclines and tylosin

===Diagnosis===

Flawrence

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