Community acquired pneumonia among adult patients at an Egyptian university hospital: bacterial etiology, susceptibility profile and evaluation of the response to initial empiric antibiotic therapy

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2018
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Abstract
Community acquired pneumonia among adult patients at an Egyptian university hospital: bacterial etiology, susceptibility profile and evaluation of the response to initial empiric antibiotic therapy Rehab H El-Sokkary,1 Raghdaa A Ramadan,1 Mohamed El-Shabrawy,2 Lobna A El-Korashi,1 Abeer Elhawary,2 Sameh Embarak,2 Rehab M Elsaid Tash,1 Neveen G Elantouny3 1Medical Microbiology and Immunology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt; 2Chest Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt; 3Internal Medicine Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt Background: Effective empirical antibiotic therapy for community acquired pneumonia (CAP), based on frequently updated data about the pattern of bacterial distribution and their antimicrobial susceptibilities, is mandatory. Aim: To identify the bacterial etiology of CAP in adults and their antibiotic susceptibility patterns and to evaluate the response to initial empirical antibiotic therapy in an Egyptian university hospital. Settings and design: A cross-sectional hospital-based study. Patients and methods: CAP cases were selected by systemic random sampling from those admitted to the chest department. All were evaluated at admission and 4 days after starting empiric therapy. Typical bacteria were isolated, identified and tested for their antibiotic susceptibility. An indirect IF assay was used to diagnose atypical bacteria. Clinical response to initial empiric antibiotic therapy was clinically, laboratory and radiologically evaluated. Results: Two hundred and seventy CAP patients were included. Bacteria represented 50.4% of them. Klebsiella pneumoniae was the most prevalent bacterium (10.37%) followed by Streptococcus pneumoniae and P. aeruginosa (7.78% each). Overall, 76.2% of isolates showed a multidrug resistant phenotype: 82.61% (19/23) S. pneumoniae, 89.66 % (26/29) K. pneumoniae, 65.22% (15/23) Pseudomonas aeruginosa, 87.50% (7/8) Escherichia coli and 81.25 % (13/16) Staphylococcus aureus. Broad spectrum β-lactams, especially carbapenems, and moxifloxacin showed in vitro efficacy on most of the tested isolates. Forty-three cases (15.9%) were nonresponders, 37 (86%) of them showed bacterial etiology. The highest rate of nonresponsiveness (30.43%) was observed in cases receiving antipseudomonal/antipneumococcal β-lactam plus a fluoroquinolone for suspected P. aeruginosa infection. Conclusion: Multidrug resistance in bacteria causing CAP and high frequency of isolation of hospital pathogens are prominent features of this study. Azithromycin containing regimens were associated with the lowest rates of nonresponsiveness. Development and implementation of an antibiotic stewardship program are highly recommended for CAP management. Keywords: pneumonia, atypical bacteria, respiratory infection, community, antibiotic stewardship, empirical therapy, infection control
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Authors Rehab H El-Sokkary;Raghdaa A Ramadan;Mohamed El-Shabrawy;Lobna A El-Korashi;Abeer Elhawary;Sameh Embarak;Rehab M Elsaid Tash;Neveen G Elantouny and
Journal Infection and drug resistance
Year 2018
DOI
10.2147/IDR.S182777
URL
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