Diarrhea is the most important disease of neonatal calves, and it results in the greatest economic losses. A longitudinal observational study was conducted from September 2015 to October 2017. This study proposes to investigate the incidence of diarrhea in calves and their mortality rate so as to identify potential risk factors related to the occurrence of calf diarrhea on 372 farms in the regions of Abidjan, Bouake, Bondoukou, and Korhogo in Ivory Coast. Information on potential risk factors was collected based on personal observations from regular visits to the farms and from a survey conducted during the period of the study. A total of 2020 calves under the age of three months were selected. Only 347 (17.17%) of the 2020 calves showed signs of diarrhea. The overall mortality rate was 0.39%. Based on the survey, colostrum feeding, the calf’s age and sex, calf housing, seasonal variation, the calving period, environment conditions, the ignorance of herdsmen, and management systems were found to be the major risk factors for gastroenteritis in calves. Calves reared in an extensive system were less susceptible to neonatal diarrhea. The calf health and management issues found in this study can be resolved by creating awareness among farm owners and implementing better calf management practices and cattle vaccination programs.

The aim of the current study was to identify the prevalence of rotavirus infection in newborn calves aged from 1 day to 3 months old in Abidjan region. A total of 145 fecal samples were collected from both diarrheic (n=135) and nondiarrheic (n=10) neonatal calves. Neonatal calves' fecal samples were collected in dry seasons and in rainy seasons in Abidjan and suburbs from 2015 to 2017. Investigated calves were divided into 4 age groups (1-10 days old, 10-25 days old, 25-60 days old and ≤90 days old). All samples were screened for the presence of rotavirus antigen by ELISA kit. Among the 145 feces samples examined by ELISA, 19 were identified positive (13.10%). Infection prevalence peaked have been obtained at 10 -25 days of age and in the rainy season. The prevalence was higher in suburbs and during the rainy season. The present study showed that rotaviruses are involved in the neonatal calves' diarrhea in Abidjan area.

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This study was conducted in four departments of the North of Côte d'Ivoire from November 2016 to October 2017. The aim of the survey was to identify the gastrointestinal parasites responsible for the numerous mortalities and economic losses observed among guinea fowl breeders in the north of Ivory Coast. Thus, a coprological study of 448 feces emitted from animals or taken directly from the small intestine and caeca of dead animals was conducted in (LANADA). The results reveal the presence of five parasites Eimeria spp; Ascaris spp; strongle spp; Trichurus spp and Taenia spp. Coccidia is most represented with an overall prevalence of 42.85%, followed by Ascaris spp (16.07%), strongle spp (14.06%), Trichuris spp (5.35%) and Taenia spp (1.33%). The department of Korhogo has the most rate of coccidia with a prevalence of 77.68%. However, the department of Sinématiali hosts the highest diversity of parasite overall with the presence of the five parasites. Subjects infected are more pronounced during the wet season with the highest prevalence rates in animals over 21 days of age. To increase productivity in Guinea fowl breeding in the north of the country, it would be interesting to offer to breeders, a prophylaxis program adapted to this method of breeding.