Streptococcal infection and abdominal pain
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Streptococcal Infection and Abdominal Pain: Clinical Presentations and Associations
Abdominal Pain as a Symptom of Streptococcal Toxic Shock Syndrome and Peritonitis
Severe abdominal pain can be an initial symptom of invasive streptococcal infections, particularly in cases of streptococcal toxic shock syndrome (STSS) and primary peritonitis. Several case reports describe patients—both adults and children—presenting with sudden, severe abdominal pain, sometimes accompanied by signs of shock, multiorgan dysfunction, and peritonitis, where group A Streptococcus (GAS) was identified as the causative agent Hung2005Kaneko2015Oliveira2025+3 MORE. In these cases, the abdominal pain was often severe and rapidly progressive, sometimes requiring emergency surgical intervention. Notably, the source of infection was not always clear, and intraoperative findings often revealed peritonitis without obvious perforation or necrosis Oliveira2025Kanetake2004Suzuki2021+1 MORE. Early recognition and prompt surgical management, including peritoneal lavage and drainage, were critical for patient survival in several reports Suzuki2021Yokoyama2016.
Streptococcal Bacteremia and Unexplained Abdominal Pain
Group A streptococcal bacteremia can also present with unexplained severe abdominal pain, even in the absence of a clear primary infection site. In some cases, patients with GAS bacteremia had no identifiable source, and abdominal pain was the main presenting symptom Bibler1986Kaneko2015. This highlights the importance of considering streptococcal infection in the differential diagnosis of acute abdomen, especially when other causes are not apparent.
Abdominal Pain in Streptococcal Pharyngitis: Age and Gender Differences
The relationship between abdominal pain and streptococcal pharyngitis is more nuanced. A large meta-analysis found no significant association between abdominal pain and GAS pharyngitis in the general pediatric population, suggesting that abdominal pain is not a reliable indicator of streptococcal throat infection for most children . However, another study found that in boys, especially those under six years old, abdominal pain and nausea were more commonly associated with rapid-test-confirmed GAS pharyngitis, while this association was not seen in girls . This suggests that abdominal pain may be a more useful diagnostic clue for streptococcal pharyngitis in young boys with fever.
Rare Streptococcal Species and Abdominal Abscesses
While most reports focus on group A Streptococcus, rare cases of abdominal abscesses caused by other streptococcal species, such as Streptococcus thoraltensis, have also been documented. These cases present with acute abdominal pain and require surgical intervention, but are much less common and may reflect changing epidemiology .
Conclusion
Streptococcal infections can present with abdominal pain in a variety of clinical contexts. Severe, sudden abdominal pain may signal invasive GAS infections such as STSS or primary peritonitis, which require urgent recognition and intervention Hung2005Kaneko2015Oliveira2025+3 MORE. In children, abdominal pain is not a strong predictor of streptococcal pharyngitis overall, but may be more relevant in young boys with fever Eroğlu2024Igarashi2017. Clinicians should maintain a high index of suspicion for streptococcal infection in cases of unexplained acute abdomen, especially when accompanied by systemic symptoms or rapid deterioration. Early diagnosis and prompt management are essential to improve outcomes in these potentially life-threatening conditions.
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