Genital tract infections Genital tract infections are generally polymicrobial in nature. Gram-positive cocci, bacteroides, and Clostridium species predominate as anaerobic organisms. Escherichia coli and gram-positive cocci are common aerobes. The most common organism reported in mastitis is Staphylococcus aureus . The organism usually comes from the breast-feeding infant's mouth or throat.
Numerous factors make pregnant and postpartum women more susceptible to thrombosis.
Pregnancy is known to induce a hypercoagulable state secondary to increased levels of clotting factors. There is also venous stasis in the pelvic veins during pregnancy. Although relatively rare, septic pelvic thrombosis occasionally is observed in the postpartum patient who might present with fever. Perineal cellulitis and episiotomy infections Etiologic organisms associated with perineal cellulitis and episiotomy infections are most often Staphylococcus or Streptococcus species and gram-negative organisms, as in endometritis. Vaginal secretions contain as many as 10 billion organisms per gram of fluid.