LACK OF EVIDENCE OF PORCINE CIRCOVIRUS TYPE 2 INFECTION IN NATURALLY ACQUIRED CONGENITAL TREMORS TYPE AH IN PIGLETS IN SPAIN

摘要

Congenital tremors (CT) is a condition characterized by a tremor of the head and limbs of newborn piglets (2). CT has been classified in types A or B based on the presence or absence of morphologic lesions, respectively. Infectious, genetic and toxiccauses have been associated to A types of CT (2). Among the infectious causes, hog cholera virus can cause type AI CT, pseudorabies virus (PRV) has also been associated to a non-classified CT form, and an unidentified virus is considered the cause of CTtype All. During early 90s, porcine circovirus (PCV) was associated to this latter form of CT (2). In year 2001, porcine circovirus type 2 (PCV2), the cause of postweaning multisystemic wasting syndrome (1), was associated to CT type All (6). Since PCV2infection is highly widespread in Spain, the objective of the present study was to determine if naturally occurring type All CT cases detected in our country were associated or not to PCV2 infection.