ACTINOMYCES ; This group of bacteria is frequently found in women  fitted with an intrauterine contraceptive device . Morphologically it appears As a fluffy ball of bacteria 20-100Uin diameter with slender branching threads streaming from it .Normally inflammatory reaction is minimal and the organism causes no symptoms although there is a small risk of ascending infection. Non pathogenic amoeba, Entamoeba gingivalis have been found in association with actinomycosis