Which treatment is appropriate for Streptococcus equi (strangles) in horses?

Which treatment is appropriate for Streptococcus equi (strangles) in horses?

• A. Penicillin or Nothing
• B. Aminoglycoside and NSAID
• C. Chlortetracycline
• D. Metronidazole

Answer: (A)

Penicillin is the antimicrobial of choice for Streptococcus equi (strangles) because this organism is highly susceptible to beta-lactam antibiotics, and early penicillin treatment can limit the infection, shorten illness, and reduce contagious shedding. In many mild, localized cases with abscesses forming, some clinicians opt for no antibiotic therapy to allow natural drainage, reserving antibiotics for cases with fever, systemic signs, or concern for airway compromise. When therapy is chosen, penicillin is the best option. Other drugs listed aren’t appropriate primary treatments for strangles. Aminoglycosides have limited activity against streptococci and poor penetration into abscess material, plus they carry risks of kidney and ear toxicity. Metronidazole targets anaerobes and would not address Streptococcus equi. Chlortetracycline is not the preferred agent for this infection, and NSAIDs, while helpful for fever and pain, do not treat the bacterial infection itself.

Penicillin is the antimicrobial of choice for Streptococcus equi (strangles) because this organism is highly susceptible to beta-lactam antibiotics, and early penicillin treatment can limit the infection, shorten illness, and reduce contagious shedding. In many mild, localized cases with abscesses forming, some clinicians opt for no antibiotic therapy to allow natural drainage, reserving antibiotics for cases with fever, systemic signs, or concern for airway compromise. When therapy is chosen, penicillin is the best option.

Other drugs listed aren’t appropriate primary treatments for strangles. Aminoglycosides have limited activity against streptococci and poor penetration into abscess material, plus they carry risks of kidney and ear toxicity. Metronidazole targets anaerobes and would not address Streptococcus equi. Chlortetracycline is not the preferred agent for this infection, and NSAIDs, while helpful for fever and pain, do not treat the bacterial infection itself.