Difference between revisions of "Borrelia"
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| − | + | *Longer, wider, helical spirochaetes with a linear chromosome and linear and circular plasmids | |
| + | *Obligate parasites transmitted by arthropod vectors | ||
| + | *Cause systemic infections in many animals and humans | ||
| + | *Slow growth in specialised culture media | ||
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| + | [[Borrelia burgdorferi]] | ||
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| + | ===Avian spirochaetosis=== | ||
| + | |||
| + | *Caused by ''Borrelia anserina'' | ||
| + | *Acute, endemic disease of birds in tropical and subtropical regions | ||
| + | *Chickens, turkeys, pheasants, ducks and geese susceptible | ||
| + | *Transmitted by soft ticks of the ''Argas'' family, but also via contact with infected material such as blood and tissues | ||
| + | *Transmitted transovarially and trans-stadially via the tick population | ||
| + | *Outbreaks during peak tick activity during warm, humid conditions | ||
| + | *Fever, anaemia and wight loss occurs, with development of paralysis later | ||
| + | *Immunity is serotype specific | ||
| + | *Diagnosis using dark-field microscopy of buffy coat smears or immunodluorescence of blood or tissues | ||
| + | *Giemsa-stained smears and silver impregnation of tissues | ||
| + | *Isolation of borreliae by inoculation of embryonated eggs or chicks | ||
| + | *Antibiotic treatment | ||
| + | *Inactivated vaccines available | ||
Revision as of 22:29, 14 May 2010
- Longer, wider, helical spirochaetes with a linear chromosome and linear and circular plasmids
- Obligate parasites transmitted by arthropod vectors
- Cause systemic infections in many animals and humans
- Slow growth in specialised culture media
Avian spirochaetosis
- Caused by Borrelia anserina
- Acute, endemic disease of birds in tropical and subtropical regions
- Chickens, turkeys, pheasants, ducks and geese susceptible
- Transmitted by soft ticks of the Argas family, but also via contact with infected material such as blood and tissues
- Transmitted transovarially and trans-stadially via the tick population
- Outbreaks during peak tick activity during warm, humid conditions
- Fever, anaemia and wight loss occurs, with development of paralysis later
- Immunity is serotype specific
- Diagnosis using dark-field microscopy of buffy coat smears or immunodluorescence of blood or tissues
- Giemsa-stained smears and silver impregnation of tissues
- Isolation of borreliae by inoculation of embryonated eggs or chicks
- Antibiotic treatment
- Inactivated vaccines available