Postoperative enteritis caused by methicillin-resistant Staphylococcus aureus

Area of Science:

• Infectious Diseases
• Gastroenterology
• Immunology

Background:

• Postoperative enteritis is a serious complication following digestive disease surgery.
• Methicillin-resistant Staphylococcus aureus (MRSA) is a significant pathogen in healthcare-associated infections.
• Antibiotic prophylaxis with extended-spectrum cephem may not prevent MRSA enteritis.

Purpose of the Study:

• To investigate the clinical features of MRSA-induced postoperative enteritis.
• To identify the characteristics of MRSA strains causing enteritis.
• To explore the potential therapeutic effects of glucocorticoid hormone and gamma globulin on MRSA enteritis.

Main Methods:

• Clinical data analysis of 14 male patients with postoperative enteritis.
• Isolation and characterization of MRSA strains from patient samples.
• In vitro study on the effects of MRSA toxins on cytokine production (TNF-alpha, IL-2) in healthy volunteers.
• Assessment of glucocorticoid hormone and gamma globulin's impact on cytokine production.

Main Results:

• Diarrhea occurred a mean of 3.3 days postoperatively and lasted 5 days.
• MRSA strains isolated were predominantly coagulase type II, producing enterotoxins A, C, and TSST-1.
• These MRSA strains were sensitive to vancomycin and arbekacin but resistant to many other antibiotics.
• TSST-1 and MRSA culture supernatant enhanced TNF-alpha and IL-2 production.
• Glucocorticoid hormone and gamma globulin suppressed TNF-alpha and IL-2 production.

Conclusions:

• Postoperative enteritis in these patients was primarily caused by specific MRSA strains producing enterotoxins A, C, and TSST-1.
• These MRSA strains exhibit multi-drug resistance.
• Glucocorticoid hormone and gamma globulin show promise in managing the inflammatory response in MRSA enteritis.