Antibiomicrobial Susceptibility Testing of Serratia Species Isolated from Hospitalized Patients in Two Hospitals in Al-Mosul, Iraq (Brief Communication )

Thikra S. Ali


A total of 150 samples (20 blood, 10 throat swabs, 20 sputum, 50 urine and 50 wounds) were collected from patients admitted Al- Salam and Al- Zahrawi hospitals in the city of Mosul, Iraq and examined for the presence of bacteria Serratia species.

By using morphological, cultural and biochemical it was possible to identify 25 Serratia isolates among the 150 samples. The identifications was confirmed by the API 20E system.

The 25 isolates were identified as Serratia marcescens (12) (both pigmented and non pigmented),
S. odorifera1(10), S. odorifera 2(2), and 1 isolate S. plymuthica. Serratia marcescens isolates were highly sensitive to Cephtriaxone and Ciprofloxacin, and 100% resistant to Ampicillin, Nitrofuration, Refampicin and Tetracycline, but expressed variable degree of resistance to other antibiotics.
S. odorifera 1 isolates, on the other hand, showed high sensitivity to Cephtriaxone, Chloramphenicol, Ciproflaxocin, Cotrimoxazol and Nalidixix acid, but high resistance to Ampicillin, Cephalexin, and Refampicin, and varied in its response to other antibiotic. S. ordoifera 2 isolates were highly sensitive to Cephalexin, Cephtraizcxone, Chloramphenicol, Ciprofloxacin, Cotrimoxazol and Nalidixic acid, but highly resistant to Ampicillin, Refampicin. S. plymuthica isolate was sensitive to Cephtraiacxone, Chloramphenicol, Ciprofloxacin, Cotrimoxazol, Gentamycin and Nalidixic acid, but resistant to Ampicillin, Cephlaexin, Refampicin and Tetracycline.


Serratia spp., Isolation, Identification, Pigment production, Antibiotic sensitivity

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