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Comparative Study
. 2015 Sep;15(3):861-7.
doi: 10.4314/ahs.v15i3.21.

Inducible clindamycin resistance and nasal carriage rates of Staphylococcus aureus among healthcare workers and community members

Alaa M Mahmoud  1 , Hanaa S Albadawy  1 , Samira M Bolis  1 , Naser E Bilal  1 , Abdalla O Ahmed  2 , Mutasim E Ibrahim  3
Affiliations
Comparative Study

Inducible clindamycin resistance and nasal carriage rates of Staphylococcus aureus among healthcare workers and community members

Alaa M Mahmoud et al. Afr Health Sci. 2015 Sep.

Abstract

Background: Nasal carriage of Staphylococcus aureus is becoming an increasing problem among healthcare workers and community individuals.

Objectives: To determine the prevalence of methicillin-resistant S. aureus (MRSA) nasal colonization and inducible clindamycin resistance (ICR) of S. aureus among healthcare workers at Soba University Hospital and community members in Khartoum State, Sudan.

Methods: Five hundred nasal swabs samples were collected during March 2009 to April 2010. Isolates were identified using conventional laboratory assays and MRSA determined by the disk diffusion method. The D-test was performed for detection of ICR isolates with Clinical Laboratory Standard Institute guidelines.

Results: Of the 114 S. aureus isolated, 20.2% represented MRSA. The occurrence of MRSA was significantly higher among healthcare worker than community individuals [32.7% (18/55) vs. 6.9% (5/59)] (p=0.001). Overall the 114 S. aureus isolates tested for ICR by D-test, 29 (25.4%) yielded inducible resistance. Significantly higher (p=0.026) ICR was detected among MRSA (43.5%) than methicillin-susceptible S. aureus (MSSA) (20.9%).

Conclusion: MRSA nasal carriage among healthcare workers needs infection control practice in hospitals to prevent transmission of MRSA. The occurrence of ICR in S. aureus is of a great concern, D- test should be carried out routinely in our hospitals to avoid therapeutic failure.

Keywords: S. aureus nasal carriage; community members; healthcare workers; inducible clindamycin resistance.

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