Actinomyces naeslundii as an agent of pelvic actinomycosis in the presence of an intrauterine device.

Actinomyces naeslundii is a saprophyte, sometimes a pathogen, of the human oral cavity. Very few extra-oral infections related to this agent have been described. We report the first instance of A.

Seroreactivity to Mycoplasma pneumoniae and Legionella pneumophila: lack of a statistically significant relationship.

We reviewed antibody titers to Mycoplasma pneumoniae and Legionella pneumophila serogroup I in sera from 1,060 cases of acute respiratory infection to determine whether there was an association in seroreactivity to these organisms. Of the 170 serum pairs with antibodies to L. pneumophila (35 seroconversions and 135 with presumptive titers), 32 (18.