Frequency of nonfermentative Gram-negative bacilli isolated from clinical materials of patients at Universidade Federal do Ceara Hospital complex Brazil

Among one thousand eight hundred and thirty-four Gram-negative bacilli, iso lated at Universidade Federal do Ceara hospital complex - Brazil, from Janu ary 1995 to February 1996, 456 (24.8%) were Nonfermentative Gram-Negative B acilli (NFGNB). This study reports their identification to the species leve l and their frequency as well. Thirteen genera and thirty species were iden tified and Pseudomonas aeruginosa was the most frequent species (69.95%), f ollowed by Acinetobacter baumannii (5.48%) and by Acinetobacter lwoffii (3. 95%). Among the identified P. aeruginosa strains, 94.1% produced pigment bu t 7.9% of them produced pigment only after being cultivated several times. The frequency of the most species was similar to that reported in the liter ature.