Pneumococcal puerperal mastitis in a lactating mother.

Introduction: A case of pneumococcal mastitis in a breast-feeding mother 6 months postpartum is described. Mastitis is usually caused by . A review of the literature from 1950 to March 2018 revealed only four other cases in which the causative organism was .

Case Presentation: The nursing mother presented with high fever and the four cardinal signs of inflammation of the left breast: calor, dolor, rubor, tumour. In milk culture was isolated in numbers exceeding 10  c.f.u. ml . The strain was of polysaccharide serotype 11 not included in Prevnar-13. Susceptibility testing showed full sensitivity to -lactam antibiotics as well as to macrolides, lincosamides, vancomycin and tetracycline.

Conclusion: should be considered as a possible causative agent of puerperal mastitis.