Key result
Lack of vaccination linked to ~54% higher infectious laryngotracheitis seropositivity in layer hen flocks.
Why the study?
Since 2017, epidemics with respiratory disorders resembling laryngotracheitis occurred in laying hen farms in Algeria, prompting an analysis of the epidemiological, serological, and clinical indicators and risk factors of infectious laryngotracheitis.
Observational (n=48)
Yes
Odds Ratio: 1.54
p-value: p=0.01
The study confirms the circulation of infectious laryngotracheitis virus in Algerian layer hen farms and identifies lack of vaccination and poor hygiene as key risk factors.
May support vaccination and hygiene interventions in Algerian flocks; leaves open causal confirmation via prospective studies.
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Salhi et al. (2021) conducted an observational in Infectious laryngotracheitis (n=48). Lack of vaccination vs. Vaccinated flocks was evaluated on Seropositivity for infectious laryngotracheitis (OR 1.54, p=0.01). Lack of vaccination (OR 1.54, p=0.01) and poor hygiene (OR 1.68, p=0.002) were significantly associated with increased infectious laryngotracheitis seropositivity in Algerian layer hen flocks.
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