The current study aims to investigate in distribution and epidemiological aspect of some bacterial species that causes of skin abscess in the local horse in females and males at different ages in Al-Qadissiyah province by using VITEK 2. Sixty horses have skin abscess at different old ages and included females and males were chosen randomly consist of (15) adult male, (15) adult female, (15) foal male and (15) foal female. All the animals examined clinically and showed skin abscess in different body regions are included the head, the neck, the back, the abdomen, the front legs, and the hind legs. Sixty swaps are taken from all the study animals then kept in a sterile tube at (4) C until reach to the lab. All the swaps submitted to culture on nutrient media for enrichment then the colonies are tested by using VITEK 2 apparatus and make gram stain. Our finding showed that bacteria agents that isolated from skin abscess in horse were Corynebacterium equi was (81.6) %, Corynebacterium pseudotuberculosis was (10) %, Streptococcus equi was (15) % and Actinomyces denticolens was (5) %. The percentage of Corynebacterium equi was (57.2) % in females and (42.8) % in males. Percentage of Corynebacterium pseudotuberculosis was (66.6) % in female and (33.3) % in males, Streptococcus equi was (55.5) % in female and (44.4) % in males, and percentage of Actinomyces denticolens was (66.6) % in female and (33.3) % in males. Percentage of infection occurrence was distributed on several regions included the head, the neck, the back, the forelimb, the hind limb, and the abdomen, wherever the percentage was (3.3) %, (5) %, (1.6) %, (5) %, (13.3) % and (71.6) % respectively. The current study showed a distribution percentage of bacterial species according to the ages, wherever the percentage of Corynebacterium equi was (28.5) % in adult and (71.4) % in foal, also, percentage of Corynebacterium pseudotuberculosis was (33.3) % in adult and (66.6) % in foal. Percentage of Streptococcus equi was (22.2) % in adult and (77.7) % in foal and percentage of Actinomyces denticolens was (100) % in adult and (0) % in foal. Knowledge and determining the bacteria species that cause skin abscess in horses enhance the veterinarian clinician to treating it and prevent the recurrent skin abscess.

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