The bacteriological study of Acinetobacter baumannii isolated from burn patients in al-Nasiriyah city-Iraq

Abstract EN

The aim of present study was to investigated some virulence factors of Acinetobacter baumannii as well as study their tolerance to some environmental factors.

It was identified 20 isolates of A.baumannii.

burn patients in Al-Hussien Teaching Hospital and other burn care units in Al Nasiriyah city .

The specimens were collected during period from August 2018 to February 2019.

It were taken by swabs from pus of the burned area and then inoculated on blood agar and MacConkey agar.

The isolates were diagnosed by microscopic examination, biochemical tests , API 20 E and Vitek- 2 system .

some virulence factors of bacteria detected such as capsule , biofilm formation , colony factor antigens and gelatin liquification , the results revealed that100%, 85% ,75% and 65% of isolates were positive to capsule, biofilm formation , colony factor antigens producing and gelatin liquification respectively .The effect of some environmental factors on bacterial growth are studied .It is found that the optimal range of pH for bacterial growth is 6-10 ,and the optimal growth of bacteria in a concentration 5% of NaCl , as well as , it shows that all bacterial isolates have the ability to grow in 44 °C.

Due to the spread of these bacteria in our hospitale ,especially in the burns unite , this study was doen o detecated its properties and virulence factors .