Guinea Pig Streptococcosis Study Guide
Overview and Clinical Importance
Streptococcosis in guinea pigs (Cavia porcellus) represents one of the most clinically significant bacterial infections encountered in this species. The disease is primarily caused by Streptococcus equi subspecies zooepidemicus (the most common pathogen) and Streptococcus pneumoniae. These infections manifest as multisystemic disease with various clinical presentations including cervical lymphadenitis (also known as "lumps"), pneumonia, septicemia, otitis media, and reproductive disorders.
Streptococcosis is a high-yield topic for the NAVLE examination due to its zoonotic potential, characteristic clinical presentation, and unique treatment considerations in guinea pigs. Understanding antibiotic safety in this species is critical, as many commonly used antibiotics are contraindicated due to disruption of the normal gastrointestinal flora.
Etiology and Causative Agents
Guinea pigs are susceptible to infection by several Streptococcus species, with two being most clinically significant:
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