Table 2.

A list of risk factors responsible for Salmonella contamination of broiler-chicken flocks.

Risk factors	Reference
Inadequate level of hygiene	[87,88]
Salmonella contamination of the previous flock with a persistence inside the house	[89,90] [91]
Contaminated day-old chicks and feed	[89,92–94]
The farm structure (>3 houses on the farm)	[89]
Wet and cold season	[89]
Litter-beetle infestation of the house	[91]