The prevalence of gastrointestinal helminth infections of dog in Enugu State, South Eastern Nigeria was studied retrospectively and prospectively. In the retrospective study, records of all diagnosed helminth infections of dogs brought to the University of Nigeria Veterinary Teaching Hospital, Nsukka from January, 2006 to September 2013 were collated and analyzed. The prospective study was carried out between October 2013 and July 2014 by examination of 263 faecal samples collected per rectum from dogs presented to a purposively selected Veterinary Clinics in Enugu metropolis and the Veterinary Teaching Hospital of the University of Nigeria, Nsukka. The results of the 8 year retrospective prevalence study gave an overall prevalence of 56.1% and Ancylostoma species as the most prevalent helminth in the study area (33.2%). Mixed infections with more than one helminth parasite species were recorded in 8.6% of the cases. Annual breakdown of the prevalence data showed that the highest prevalence was recorded in 2009. Breed and age of the dogs were found to significantly influence the prevalence. In the prospective study, an overall prevalence of 51.7% was obtained. Ancylostoma spp. was also found most often in the study area, with a prevalence rate of 33.6%. Mixed infections with more than one helminth parasite species were found in 16.3% of the cases. A strong association was obtained between prevalence and breed of the dogs and also between prevalence and season. Due to the zoonotic nature of most of the encountered parasites and the close association between children and dogs, routine deworming, proper management of dogs and adequate personal hygiene is therefore recommended.

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