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AETIOLOGICAL AGENTS OF THE WOUND INFECTIONS AND THEIR ANTIMICROBIAL SUSCEPTIBILITY PATTERN

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INTRODUCTION

The primary function of intact skin is to control microbial population that live on the skin surface and to prevent underlying tissue from becoming colonized and invaded by potential pathogens (Ndipet. al., 2007). Exposure of subcutaneous tissue following a loss of skin integrity (i.e. wound) provides a moist, warm and nutritious environment that is conducive to microbial colonization and proliferation.

A wound is defined as any injury that damages the skin and therefore compromises its protective function. An acute wound is generally caused by external damage to the skin, including abrasions, minor cuts, lacerations, puncture wounds, bites, burns and surgical incisions. A wound is a breakdown in the protective function of the skin; the loss of continuity of epithelium, with or without loss of underlying connective tissue (Leaper and Harding, 1998). Wounds can be accidental, pathological or post operative. All wounds contain bacteria but majority of the wounds do no get infected. There are many variables that can promote wound infection when there is a discontinuity of skin barrier. This include both host and organism related factors like bacterial load and type, immune competence of host co-morbid like diabetes mellitus, etc (Mir et. al., 2012). An infection of this breach in continuity constitutes wound infection. Wound infection is thus the presence of pus in a lesion as well as the general or local features of sepsis such as pyrexia, pain and indurations.

Wound infections are one of the most common hospital acquired infections and are an important cause of morbidity and account for 70-80% mortality (Gottrupet al., 2005; Wilson et al., 2004).

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