Browsing by Author "DEMEKE HAILU TEWOLDEMEDHIN"

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    SERO-PREVALENCE OF INFECTIOUS LARYNGOTRACHEITIS IN BACKYARD CHICKENS IN SOUTHERN ETHIOPIA
    (HAWASSA UNIVERSITY, 2023-10) DEMEKE HAILU TEWOLDEMEDHIN
    Infectious laryngotracheitis is an acute, highly contagious upper-respiratory viral disease of chickens, clinically characterized by inflammation and hemorrhage of the larynx and trachea with a significant economic impact on poultry industry globally. This cross sectional study was conducted between December, 2022 and May, 2 0 2 3 using multistage cluster sampling technique to estimate the sero- prevalence of ILTV and identify potential risk factors in backyard chickens in selected districts of southern Ethiopia. Sample size was determined using a method recommended by Thrusfield (2018) for estimating the total number of households when the average sample size per household is fixed. A total of 240 serum samples were collected from chickens in 240 households and screened using an indirect ELISA test kit (IDvet, ID Screen® ILT, ILTS ver 0416 GB) to estimate the household-level sero-prevalence of ILTV. To this end, data were generated using a semi-structured questionnaire and serological screening. The overall household level sero-prevalence was 27.9% (95% CI: 22.6% – 34.0%). The highest prevalence was recorded in the midland agro-ecologic zone 32.9% (95% CI: 23.8% - 43.6%) followed by the lowland 28% (95% CI: 19.0% - 39.2%) and the highland 22.5% (95% CI: 14.6% – 33.0%). Among the hypothesized risk factors, namely, location (district/kebele), agro-ecology, age, sex, breed and flock size, only age and flock size were identified as potential risk factors for ILTV prevalence in backyard chickens (p < 0.05). In line with this, the prevalence was high in adult birds (OR: 2.6, 95% CI: 1.3 - 5.2) and among birds in larger flock (OR: 4.3, 95% CI: 2.3 - 8.0). The study also indicated that the backyard chicken husbandry practice was highly risky in the transmission and maintenance of ILTV due to poor biosecurity and management practices. Thus, this study suggests the disease is prevalent in the study area and demands control intervention.