Difference between revisions of "Actinobacillus lignieresii"
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| − | # | + | *Pathogenesis and pathogenicity: |
| + | **Commensal in the mouth and intestinal tract of cattle and sheep | ||
| + | **Penetrates damaged mucosa to cause chronic granulomatous inflammation of soft tissues, a condition known as Actinobacillosis | ||
| + | **Enodogenous, sporadic infection | ||
| + | **Lesions in the tongue, cheek, lips and sometimes in the lower gut and lungs from aspiration | ||
| + | **Often spreads from the site of infection to lymphatics, and may cause pyogranulomatous lymphadenitis | ||
| + | **[[Muscles Inflammatory - Pathology#Wooden tongue|Myositis]] and formation of fibrous tissue in the lesions lead to hardening of the tissue, hence the condition is known as 'wooden tongue' in cattle | ||
| + | **In sheep abscesses with thick walls are produced | ||
| + | **Feeding is impaired, causing loss of condition | ||
| + | **Infection in the oesophageal groove can cause tympany and enlargement of the retropharyngeal lymph node, causing difficulty in swallowing and breathing | ||
| + | **[[Bacterial skin infections - Pathology#Bacterial granulomatous dermatitis|Cutaneous lesions]] in cattle and sheep | ||
| + | **Contamination of the environment via ulcerating lesions | ||
| + | *Diagnosis: | ||
| + | **Induration of tongue | ||
| + | **Tissue sections may demonstrate pyogranulomatous foci containing club colonies | ||
| + | **Gram negative rods may be present in smears from exudates | ||
| + | **Cultures on blood agar and MacConkey agar, incubated for 24-72 hours | ||
| + | **Blood agar: small, sticky, non-haemolytic clonies | ||
| + | **MacConkey agar: slow lactose fermentation | ||
| + | *Treatment: | ||
| + | **Sodium iodide parenterally, or potassium iodide orally | ||
| + | **Potentiated sulphonamides or a penicillin/streptomycin combination | ||
| + | **Rough feed should be avoided | ||
| − | [[Category:Actinobacillus species]][[Category:Cattle | + | Causes [[Actinobacillosis|Actinobacillosis (wooden tongue)]] |
| + | |||
| + | [[Category:Actinobacillus species]][[Category:Cattle]] | ||
| + | [[Category:To_Do_-_Bacteria]] | ||
Revision as of 09:47, 25 June 2010
- Pathogenesis and pathogenicity:
- Commensal in the mouth and intestinal tract of cattle and sheep
- Penetrates damaged mucosa to cause chronic granulomatous inflammation of soft tissues, a condition known as Actinobacillosis
- Enodogenous, sporadic infection
- Lesions in the tongue, cheek, lips and sometimes in the lower gut and lungs from aspiration
- Often spreads from the site of infection to lymphatics, and may cause pyogranulomatous lymphadenitis
- Myositis and formation of fibrous tissue in the lesions lead to hardening of the tissue, hence the condition is known as 'wooden tongue' in cattle
- In sheep abscesses with thick walls are produced
- Feeding is impaired, causing loss of condition
- Infection in the oesophageal groove can cause tympany and enlargement of the retropharyngeal lymph node, causing difficulty in swallowing and breathing
- Cutaneous lesions in cattle and sheep
- Contamination of the environment via ulcerating lesions
- Diagnosis:
- Induration of tongue
- Tissue sections may demonstrate pyogranulomatous foci containing club colonies
- Gram negative rods may be present in smears from exudates
- Cultures on blood agar and MacConkey agar, incubated for 24-72 hours
- Blood agar: small, sticky, non-haemolytic clonies
- MacConkey agar: slow lactose fermentation
- Treatment:
- Sodium iodide parenterally, or potassium iodide orally
- Potentiated sulphonamides or a penicillin/streptomycin combination
- Rough feed should be avoided