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Guinea Pigs (Laboratory) - Pathology (view source)
Revision as of 23:06, 6 November 2010
, 23:06, 6 November 2010→Cervical Lymphadenitis
===Cervical Lymphadenitis===
===Cervical Lymphadenitis===
Steptococcus zooepidemicus is normally present in the conjunctiva as a commensal organism. If this organism gains access to the cervical lymph nodes they can become pathogenic and in some cases death can occur due to septicaemia. Infection will cause the lymph nodes to swell. Stress has been shown to increase susceptibility. <br />
Steptococcus zooepidemicus is normally present in the conjunctiva as a commensal organism. If this organism gains access to the cervical lymph nodes they can become pathogenic and in some cases death can occur due to septicaemia. Infection will cause the lymph nodes to swell. Stress has been shown to increase susceptibility. <br />
Necropsy will show macroscopic pathology ranging from enlarged lymph nodes to encapsulated abscesses filled with a thick yellow/white purulent exudate. Associated pathology found in other organ systems involved may include bronchopneumonia, otitis media, pleuritis, peritonitis, and pericarditis.
Necropsy will show macroscopic pathology ranging from enlarged ventral and cervical lymph nodes to encapsulated abscesses filled with a thick yellow/white purulent exudate. Associated pathology found in other organ systems involved may include bronchopneumonia, otitis media, pleuritis, peritonitis, and pericarditis. Infection may vary from an acute fatal septicemia to a chronic suppurative process in the lymph nodes, thoracic and abdominal viscera, uterus, and ears.
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Microscopic evidence of pneumonia, pleuritis, myocarditis, pericarditis, and peritonitis, otitis media, nephritis, arthritis, and cellulitis will be seen characterized by necrotizing suppurative inflammation or fibrinosuppurative inflammation.
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===Wry Neck===
===Wry Neck===