DISSEMINATION OF CLASS I INTEGRON IN ACINETOBACTER BAUMANNII ISOLATED FROM VENTILATOR-ASSOCIATED PNEUMONIA PATIENTS AND THEIR ENVIRONMENT

作者：Sirichot Suntariya; Diraphat Pornphan; Utrarachkij Fuangfa; Tribuddharat Chanwit; Siripanichgon Kanokrat^*

来源：Southeast Asian Journal of Tropical Medicine and Public Health, 2009, 40(6): 1284-1292.

Multidrug resistant Acinetobacter baumannii has become the most common cause of health care-associated infections at Maharaj Nakhon Si Thammarat Hospital, Thailand. The objective of the Study was to detect integrons using PCR-based method from 96 A. baumannii isolates from ventilator-associated pneumonia (VAP) patients and their environment. Antibiotic susceptibility was determined using a disk diffusion technique. Forty-six isolates exhibited integrase genes, with only class I and class II integron detected in 43 and 3 A baumannii isolates, respectively. Twenty-seven of 52 clinical and 19 of 44 environmental isolates were integron-positive. Detection rate of integron-positive A baumannii isolated from VAP patients increased from 25% to 83% over the 4 month study period. The majority (91%) of integron-positive A. baumannii showed resistance to 6 or more of 11 antibiotics tested and 72% of class I integron-positive isolates were imipenem-resistant Thus, class I integron-positive A. baumannii had spread among the VAP patients and into hospital environment, the latter acting as reservoirs of potential pathogens possessing drug resistance genes.

• 出版日期2009-11