Previous exposure to antibiotics including antituberculotic and antifungal agents with and without prophylactic TMP/SMX and resistance in bacteria from HIV positive children: absence of resistance selection pressure of trimetoprim sulfametoxazol : note / E. Kalavsky ... [et al.]. Journal of health management and public health. Surveillance studies in infectious diseases and nursing Vol. 10, no. 4 (2006), s. 9-14