Sources of bacterial strains.

<p>Sources of bacterial strains.</p

Identification of bacteria by specialized microbiological tests.

<p>(A) The CAMP test for identification of Group B streptococcus (horizontal streak, GBS) demonstrates an arrowhead shaped area of enhanced hemolysis when grown near <i>S. aureus</i> (vertical streak, SA). (B) The reverse CAMP test for identification of <i>Arcanobacterium haemolyticum</i> demonstrates an indentation in the linear area of hemolysis by <i>S. aureus</i> (vertical streak, SA) when it grows adjacent to <i>A. haemolyticum</i> (horizontal streak, AH). (C) The satellite test for identification of <i>Haemophilus influenzae</i> demonstrates growth of the organisms as small satellite colonies (arrowhead, H. flu) adjacent to <i>S. aureus</i> (vertical streak, SA). Similar satellite colony formation around <i>S. aureus</i> was seen for <i>Abiotrophia defectiva</i>. Similar results were seen on both defibrinated and citrated hair sheep blood agar; results are shown on citrated hair sheep blood agar plates.</p

Zones of inhibition (mm) as measured by disk diffusion and interpretation of resistance phenotype¹^,²^,³.

<p>Tests were performed in duplicate, and both measurements are reported for each organism/antibiotic.</p>1<p>DS, commercial defibrinated wool sheep blood; DH, defibrinated hair sheep blood; CH, citrated hair sheep blood.</p>2<p>P, penicillin G 10 U; Cro, ceftriaxone 30 µg; CC, clindamycin 2 µg; E, erythromycin 15 µg; CIP, ciprofloxacin 5 µg; M, meropenem 10 µg; D, doxycycline 30 µg; LVX, levofloxacin 5 µg; SXT, sulfamethoxazole-trimethoprim 1.25 µg/23.75 µg.</p>3<p>S, sensitive; R, resistant; I, indeterminate; NA, no interpretation available.</p