Thus, it might be hypothesized that certain characteristics of a broiler house, or management practices at the house-level, might influence the likelihood that a flock will be exposed to the bacteria.
Broilers reared in management systems with wood shavings on mud floor had relatively high CH4 and N2O emissions compared to broilers on wood shavings and cement floor, with the contrary observed for CO2.
A house-level variable was considered to be a physical characteristic of the broiler house, or a management practice that was carried out at the house-level.
Because horizontal transmission from the environment is thought to be the most likely source of Campylobacter to broilers, we aimed to identify broiler house characteristics and management practices associated with flock colonization.
Light intensity manipulation is an important management tool affecting broiler behaviour and physiology but still there is a debate regarding the optimum level to be used in confinement barns.
Our study has identified four risk factors related to broiler house attributes and house-management practices, for the occurrence of Campylobacter in broiler flocks in Iceland; vertical or vertical and horizontal ventilation shafts, cleaning and disinfecting boots prior to entering the broiler house, and the use of geothermal water for cleaning houses.
Broilers must be produced under continuous organic management starting "no later than the second day of life.
In Iceland, flock-level risk factors have been studied [ 32]; however, to date, the association between broiler flock Campylobacter status and the attributes and management practices of broiler houses in Iceland has not been studied.
Thermal manipulation (TM) at early and late stages of broiler embryogenesis is one of the most modern management model applied to improve the thermotolerance acquisition in broilers chickens [ 3– 11].
Several possible reasons for the sudden appearance of EC as a disease causing agent in broilers were discussed [ 12], but never the litter management.
An on-farm interview was performed to collect information on potential risk factors for Campylobacter infection in broilers, with questions about farmcharacteristics such as the environment around the farm and broiler houses, design of the broiler houses and on-farm management practices.
