●Case Background

In June 2023, an outbreak of Marek’s disease (MD) occurred at a poultry farm at a certain agricultural science academy’s animal husbandry experimental station. Marek’s disease, also known as “chicken paralysis,” is an infectious disease caused by a pathogen called the herpes virus. It is highly contagious and can be transmitted through direct or indirect contact. Breeder chickens at the farm were dying daily from the infection.

●Site Investigation

Fantong Biotechnology engineers arrived at the site after receiving the disinfection task. The farm consisted of one hatchery and four breeding sheds, two of which were for laying hens, each with two laying lines. The other two sheds housed breeder chickens. Each shed had an area of approximately 1,200 m³. The sick chickens were isolated.

●Disinfection Plan

Based on the incidence of disease in the breeder chickens, a plan was developed for dynamic disinfection of the breeder sheds, terminal disinfection of empty sheds, disinfection of water lines, and terminal disinfection of the hatchery environment and incubators. The equipment used was the KINO series SE and SUBZERO models, and low-concentration hydrogen peroxide was used for pipeline disinfection.

●Disinfection Effect

The Bacillus subtilis var. niger spore indicator test was negative during the disinfection process.

Dynamic disinfection was performed on breeder chickens, and after two weeks of observation, no adverse effects were observed.

No infected breeder chickens were found after two weeks.