Indian Journal of Microbiology Research


Non-fermenters other than Pseudomonas species: Characterization and susceptibility pattern


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Author Details: Rajesh Bareja, Iqbal Singh, Subhash Chand Jaryal, Savita Mahajan, Hiba Sami

Volume : 4

Issue : 2

Online ISSN : 2394-5478

Print ISSN : 2394-546X

Article First Page : 162

Article End Page : 166


Abstract

Background: Importance of non-fermenting gram-negative bacilli (NFGNB) in the aetiopathogenesis of human infections has increased considerably in recent years. Their higher rate of isolation from a wide variety of clinical specimens necessitates their identification and characterization.
Material and Method: A total of 5,369 bacterial isolates were obtained from 12,591 various clinical samples. All the samples were processed on Blood agar and MacConkey agar medium and identified according to standard protocol.
Result: Out of 5,369 isolates, 478 were identified as non-fermentative bacteria. Out of NFGNB strains isolated, the predominant numbers were that of P. aeruginosa 337 (70.5%) followed by other Pseudomonad’s 63 (13.1%) and other Non-fermenters 78 (16.4%). Out of strains of other non-fermenters (78) predominant number was that of Acinetobacter anitratus (34), followed by Acinetobacter lwoffii (17), Alcaligenes xylosoxidans (10), Alcaligenes denitrificans (10) and Alcaligenes faecalis (7). The most sensitive drugs against non-fermenter isolates were found imipenem followed by amikacin.
Conclusion: There is enough reason to believe that they are associated with human disease process. Therefore, careful attempts must be made for their isolation and identification from various clinical specimens.

Keywords:
NFGNB, Acinetobacter anitratus, Alcaligenes denitrificans, Imipenem