are filamentous, gram-positive anaerobic-to-microaerophilic bacilli frequently present as normal mouth flora and in tonsillar crypts and the large intestine. Moreover, there is evidence that these microorganisms are common inhabitants of the vagina. Actinomyces-like organisms (ALOs) have been ...
Actinomyces has long filaments that occasionally branch and have a beaded appearance on Wright stain (i.e., variable staining intensity along the filaments) (see Figure 16-8 and Figure 16-11). Actinomyces and Nocardia are pleomorphic organisms that may seem to be a mixed bacterial infection ...
Historically, the actinomycetes were originated around 270 million years ago. They are considered as soil organisms for a long time, but now it is established that they are present in all kinds of environments and habitats on the entire earth (Lewin et al., 2016;Wiliams, 1990). An illustrate...
Previous studies found that abscesses typically included mixed anaerobic organisms and skin flora as coisolates (Table2). This is similar to the present study in which four of six specimens grew anaerobic bacteria and one grew coagulase-negative staphylococci; as well, the patient from whomA. neu...
Histologically, the long filamentous organisms stain dark blue on routine hematoxylin and eosin preparations and are particularly easy to recognize when associated with characteristic sulfur granules. Active inflammation in the mucosal wall is typically present, and fistula formation, rupture of the ...