Table 1.

Description of six chicken houses studied.

Chicken house	Breeds	RDa	Layout (unit)	Days	Tb (°C)	RHc (%)	WSd (m s−1)	Vaccine historye
								Route	Days	Vaccine
A	Broiler	11	Cage	33	25–26	41–42	0–1.5	Intraocular	28	La sota
B	Broiler	25	Floor	25	26–27	47–48	0	DW/MIe	20	TVf
C	Layer	8.6	Cage	240	23–24	43–45	0	DW	230	La Sota
D	Layer	10.8	Cage	162	24–25	71–72	0	DW	160	La Sota
E	Breeder	8.3	Cage	269	23–26	48–52	0–2	MI	250	TVg

^aRD: raising density;

^bT: temperature;

^cRH: relative humidity;

^dWS: wind speed.

^eDW: drinking water; MI: intramuscular injection.

^fChickens were vaccinated at 20 days of age using triple vaccine (NDV (La Sota)–Infectious Bronchitis–Infections Bursal Disease) through drinking water (freeze-drying) and intramuscular injection (oil-based).

^gTriple vaccine (NDV (La Sota)–Infectious Bronchitis–Egg Drop Syndrome) (oil-based).