Resumen

MARCANO LOZADA, MJ; SERRANO MARIN, NM  y  URRESTARAZU, MI. Aerobic bacteria isolated of cutaneous ulcers in HIV-positive patients. Instituto de Biomedicina, Microbiology section, years 2001-2002. Rev. Soc. Ven. Microbiol. [online]. 2003, vol.23, n.2, pp.118-123. ISSN 1315-2556.

Between January 2001 and September 2002, we process 19 samples of ulcer secretion from HIV positive patients of the Dermatology Department of the Hospital Vargas de Caracas, isolated 27 bacterial agents, with predomination of gramnegative bacteria (74%) over grampositive (26%). The most common agent was: E. coli (29,6%), follow by P. aeruginosa (18,6%), P. mirabilis, K. pneumoniae and SCN (11,1% each one), Corynebacterium sp. (7,4%) and S. aureus, Citrobacter sp. and S. viridans (3.7% each one). Lesions of anal, genital and inguinal area contributed with 21 microorganism and chest and limbs with 6 isolates. 17 isolates are nosocomial and 10 community bacteria. Antimicrobial susceptibility (follow NCCLS guidelines for Kirby-Bauer disk diffusion) shows that P. mirabilis was a multiresistant bacteria only imipenem was effective against 1 community isolated, E. coli AMC resistant (probable SEBL producer) was found in 6/8 isolated; imipenem and ceftazidime are options against P. aeruginosa with high resistance to penicillins and aminoglycosides; 2 community isolates of K. pneumoniae was full susceptibility against all the antimicrobials tested and 1 nosocomial isolated shows increase resistance against 6 drugs. Vancomycin its the right choice against grampositive bacteria, because meticillin resistance is common (6/7 bacteria included 1 MRSA). Right bacterial identification and adequate clinical orientation near to the antibiogram results, knowledge and consideration of normal flora as an opportunistic pathogen, and the adequate communication between physician and microbiology laboratory are the basics for give a best life quality to its patients, helped by HAART and other support items

Palabras clave : VIH/SIDA; bacterias aerobias; úlceras cutáneas.