Risk factors for Aujeszky's-disease seropositivity of swine herds of a region of northern Italy.
Vaccination programs to control Aujeszky's-disease virus (ADV) using gE-deleted vaccines are being considered in several European countries. Knowledge of factors influencing ADV-seropositivity for vaccinated herds might contribute to the success of these programs. A multivariable analysis of ADV-seropositivity in 1248 swine herds (332 farrow-to-finish, 260 farrow-to-feeder and 656 finishing herds) in the Emilia-Romagna region of Italy revealed that (1) high pig density (number of pigs in a 6-km radius), (2) gilt purchasing, and (3) increased number of fattening pigs were risk factors for farrow-to-finish herds. In farrow-to-feeder herds, ADV-seropositivity was related to (1) increased number of breeders, (2) heavy-gilt purchasing, and (3) increased pig density. In finishing herds, (1) increased herd size was related to ADV-seropositivity, whereas (2) periodic rearing suspension was protective.
Tamba
M
M
Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna, Via Bianchi 9, 25124, Brescia, Italy. izsle@iperbole.bologna.it
Calabrese
R
R
Finelli
E
E
Cordioli
P
P
D000822:Animal Husbandry; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D004797:Enzyme-Linked Immunosorbent Assay; D011558:Herpesvirus 1, Suid / Q000276:immunology* / Q000302:isolation & purification; D007558:Italy / Q000453:epidemiology; D016015:Logistic Models; D015995:Prevalence; D011557:Pseudorabies / Q000453:epidemiology* / Q000276:immunology / Q000821:virology; D012307:Risk Factors; D016036:Seroepidemiologic Studies; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology* / Q000276:immunology / Q000821:virology*; D014765:Viral Vaccines
D000914:Antibodies, Viral; D014765:Viral Vaccines