TY - JOUR
T1 - β-Lactamase production and antimicrobial susceptibility pattern of Moraxella catarrhalis isolates
T2 - Report from Pakistan
AU - Sheikh, Sadia Omer
AU - Fasih, Naima
AU - Irfan, Seema
AU - Zafar, Afia
N1 - Publisher Copyright:
© 2014 Hainan Medical College.
PY - 2014/9/1
Y1 - 2014/9/1
N2 - Objective: To assess the frequency of β-lactamase production and antimicrobial resistance in Moraxella catarrhalis isolated from clinical specimens in Pakistan. Methods: This cross sectional study (January to December 2010) was conducted in clinical microbiology laboratory of Aga Khan University Hospital. A total of 97 clinical respiratory specimens growing Moraxella catarrhalis were included. Frequency of β-lactamase production and antimicrobial resistance rates against ampicillin, erythromycin, ciprofloxacin and tetracycline were noted by performing minimum inhibitory concentration (MIC). MICs were calculated as MIC50 and MIC90. Results: β-Lactamase production was detected in 84% of isolates, which correlated well with high MIC of ampicillin. Majority of isolates were susceptible to erythromycin (97%) and tetracycline (96%) with MIC90=0.12 mg/L and MIC90=1 mg/L respectively. All isolates were found susceptible to ciprofloxacin (MIC90=0.06 mg/L). Conclusions: Result suggests that empirical use of ampicillin should be discouraged while treating respiratory tract infections. This also emphasizes the importance of continuous surveillance in order to detect emerging resistance in Moraxella isolates.
AB - Objective: To assess the frequency of β-lactamase production and antimicrobial resistance in Moraxella catarrhalis isolated from clinical specimens in Pakistan. Methods: This cross sectional study (January to December 2010) was conducted in clinical microbiology laboratory of Aga Khan University Hospital. A total of 97 clinical respiratory specimens growing Moraxella catarrhalis were included. Frequency of β-lactamase production and antimicrobial resistance rates against ampicillin, erythromycin, ciprofloxacin and tetracycline were noted by performing minimum inhibitory concentration (MIC). MICs were calculated as MIC50 and MIC90. Results: β-Lactamase production was detected in 84% of isolates, which correlated well with high MIC of ampicillin. Majority of isolates were susceptible to erythromycin (97%) and tetracycline (96%) with MIC90=0.12 mg/L and MIC90=1 mg/L respectively. All isolates were found susceptible to ciprofloxacin (MIC90=0.06 mg/L). Conclusions: Result suggests that empirical use of ampicillin should be discouraged while treating respiratory tract infections. This also emphasizes the importance of continuous surveillance in order to detect emerging resistance in Moraxella isolates.
KW - Antimicrobial resistance in Pakistan
KW - Moraxella catarrhalis
KW - Moraxella catarrhalis resistance pattern in Pakistan
KW - β-lactamase enzyme
UR - http://www.scopus.com/inward/record.url?scp=84908150503&partnerID=8YFLogxK
U2 - 10.1016/S1995-7645(14)60237-6
DO - 10.1016/S1995-7645(14)60237-6
M3 - Article
AN - SCOPUS:84908150503
SN - 1995-7645
VL - 7
SP - S228-S231
JO - Asian Pacific Journal of Tropical Medicine
JF - Asian Pacific Journal of Tropical Medicine
IS - S1
ER -