RT Journal Article
SR Electronic
T1 Pneumococcal lactational mastitis in a healthy woman
JF BMJ Case Reports
JO BMJ Case Reports
FD BMJ Publishing Group Ltd
SP e250277
DO 10.1136/bcr-2022-250277
VO 15
IS 11
A1 Ujita, Ayaka
A1 Ryu, Hikohaku
A1 Kobayashi, Hiroyuki
A1 Kato, Mikiro
YR 2022
UL http://casereports.bmj.com/content/15/11/e250277.abstract
AB We report a case of lactational mastitis complicated by Streptococcus pneumoniae bacteraemia in a breast feeding, healthy woman in her 20s. Numerous investigations showed that mastitis was the probable source of S. pneumoniae bacteraemia. While S. pneumoniae is known to cause non-lactational mastitis in patients with underlying diseases, such as systemic lupus erythematosus, reports of lactating mastitis in healthy individuals are scarce, with only six cases reported in the scientific literature published in English since 1995. Similar to previous reports, our patient had a good clinical course with antimicrobial therapy, and the infection was presumably transmitted from the asymptomatic child to the mother. Although the exact mechanisms that establish transmission from a child remain unclear, both host and pathogen factors, such as stagnant milk or bacterial virulence factors, are thought to play a key role. Caution should be exercised because serotypes not currently covered by pneumococcal vaccines are emerging.