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14 cze 2024 · The designations "group C Streptococcus" (GCS) and "group G Streptococcus" (GGS) are used by clinical microbiology laboratories to denote clinical isolates of streptococci that react with Lancefield group C or G typing serum and, like Streptococcus pyogenes (group A Streptococcus), form large colonies on sheep blood agar, typically surrounded ...
Group C and G streptococci are β-haemolytic streptococci that colonize the nasopharynx, skin and genital tract and cause infections similar to group A streptococcus. These include pharyngitis, skin and soft-tissue infections, septic arthritis, osteomyelitis, pneumonia, endocarditis, puerperal sepsis, neonatal sepsis and bacteraemia.
Most streptococci important in skin infections belong to the Lancefield groups A, C and G, and are beta-haemolytic. Streptococci pneumoniae (pneumococci) are bacteria important in pneumonia and meningitis but rarely cause skin disease.
31 gru 2006 · When treating an infection caused by group G streptococci, be aware that resistance to various antibiotics--including macrolides--can be a problem. The drugs most effective against group G streptococci are penicillin, ampicillin, and cefotaxime (or ceftriaxone).
Most human infections caused by groups C and G streptococci are transmitted from person to person, but infections due to Streptococcus equi subsp. zooepidemicus (and, rarely, to S. equi subsp. equi) are zoonoses.
These guidelines are to inform empiric therapy, and if specific pathogens are known, treatment should be targeted to those pathogens. In certain populations (e.g. intravenous drug abusers, immunosuppressed, travelers), the suspected pathogens may include a broader range of organisms.
Signs and symptoms from pharyngitis caused by group C and G streptococci may be indistinguishable from GAS infection. The need for treatment in these cases is unclear because they have not been associated with the development of acute rheumatic fever. M. Kilian, in Medical Microbiology (Eighteenth Edition), 2012.
