Pathogenic Actinomycetes and Infections

The primary site of involvement is the mucosa, and it is introduced by trauma.

Cervicofacial, thoracic, and abdominal actinomycosis.

An atmosphere with increased carbon dioxide.

<p>Fastidious gram-negative bacilli, staphylococci, streptococci, or enteric gram-negative bacilli.</p> Signup and view all the answers

<p>Pyogenic lesions with interconnecting sinus tracts that contain granules composed of microcolonies of bacteria embedded in tissue elements.</p> Signup and view all the answers

<p>N. brasiliensis may be acid-fast.</p> Signup and view all the answers

<p>Biochemical tests and chromatographic analysis of cell wall components.</p> Signup and view all the answers

<p>Combinations of streptomycin, trimethoprim-sulfamethoxazole, and dapsone, with therapy most effective when begun early before extensive damage has occurred.</p> Signup and view all the answers

<p>ruptured appendix or an ulcer</p> Signup and view all the answers

<p>colonization of an intrauterine device with subsequent invasion</p> Signup and view all the answers

<p>tissue and bacterial filaments, which are club-shaped at the periphery</p> Signup and view all the answers

<p>specimens are cultured in thioglycolate broth and on brain-heart infusion blood agar plates, which are incubated anaerobically or under elevated carbon dioxide conditions</p> Signup and view all the answers

<p>catalase-negative</p> Signup and view all the answers

<p>prolonged administration (6–12 months) of a penicillin</p> Signup and view all the answers

<p>because drugs may penetrate the abscesses poorly, and some of the tissue destruction may be irreversible</p> Signup and view all the answers

<p>especially prior to dental procedures</p> Signup and view all the answers

<p>Inhalation of Nocardia bacteria</p> Signup and view all the answers

<p>Heaped, irregular, waxy colonies</p> Signup and view all the answers

<p>Mycolic acids, which are shorter-chained than those of Mycobacteria</p> Signup and view all the answers

<p>It is a characteristic feature of Nocardia bacteria</p> Signup and view all the answers

<p>Morphology, Gram staining, and catalase testing</p> Signup and view all the answers

<p>Subacute to chronic pulmonary infection</p> Signup and view all the answers

<p>It is a diagnostic feature</p> Signup and view all the answers

<p>They fragment after formation, breaking into coccobacillary cells</p> Signup and view all the answers