TABLE 1.

General information and management characteristics of the three farms

Condition or parameter	Description	Farma
		A	B	C
General information
Broiler breed	Cob	X
	Ross		X	X
pH of water tank/pipeline anteroom	Neutral (pH 7.24-7.99)			X
	Alkaline (pH 8.00-8.68)	X	X
Presence of other animals (industrial animals or pets)		X		X
Campylobacter statusb	C. jejuni		X
	C. coli	X		X
Salmonella statusb	Salmonella spp.	X
Cleansing and disinfection
Mechanical cleansing		X	X	X
Demountable devices	Alkali metals (sodium hydroxide)	X
	Sodium hydroxide, nonionic surface-active compounds		X
	Alkali metals			X
Cleansing water pipes	Hydrogen peroxide, colloidal silver	X
	Hydrogen peroxide		X
	Peracetic acid, hydrogen peroxide			X
High-pressure and disinfection	Formaldehyde, glutaraldehyde	X	X
	Quaternary ammonium, glutaraldehyde, isopropanol, formaldehyde			X
Disinfection broiler houses	Formaldehyde solution	X
	Formalin atomization		X	X
Presence of disinfection bath	Quaternary ammonium, glutaraldehyde, isopropanol, formaldehyde; alternatively, peracetic acid, hydrogen peroxide			X

^aX indicates the presence of the condition or parameter.

^bCampylobacter and Salmonella status was determined during the third, final sampling phase (Fig. 1).