Table 1.

Description of the variables obtained during the visit for sample collection in all 99 studied farms in Rio Grande do Sul–Brazil

Variable	Type	Description	Categories
Region	Categorical	Macro-region of Rio Grande do Sul state	Center-occidental, Center-oriental, Metropolitan of Porto Alegre, Northeast, Northwest, Southeast, and Southwest
Vaccine	Dichotomic	Use of vaccination against Campylobacter fetus	Yes or no
Type of farm	Dichotomic	Type of livestock system	Complete cycle or raising and restocking
Bull sale	Dichotomic	Frequent acquisition of new bulls	Yes or no
Natural service	Dichotomic	Use of bulls to breed females not pregnant after artificial insemination	Yes or no
Cfv* test	Dichotomic	Routine testing in the farm for Cfv detection	Yes or no

*Cfv Campylobacter fetus subsp. venerealis