Suppurative thyroiditis is rare, and the major pathogens are Staphyloc
occus and Streptococcus species. We present a case caused by Acinetoba
cter baumanii, which has never before been reported. We review another
191 cases from the English-language literature (1980 to April 1997) a
nd make a comparison with a review of 224 cases (1900-1980). As the nu
mbers of immunocompromised patients increase, cases of suppurative thy
roiditis are increasing. Pneumocystis carinii has become an important
pathogen. Most patients (83.1%) with bacterial infections were euthyro
id, whereas those with fungal or mycobacterial infections tended to be
hypothyroid (62.5%) and hyperthyroid (50%), respectively.