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BACKGROUND AND PURPOSE We conducted serological and virological surveillance of pig farms in Taiwan from areas epidemic for low pathogenic avian influenza virus (AIV), H5N2 subtype, in order to determine the prevalence of AIV and swine influenza virus (SIV) in 2004. METHODS Pig sera from 9833 animals from 1974 farms in 9 counties were examined using agar(More)
The recommended use of doxycycline (DC) to broiler chicken is 100 mg/L via the drinking water and a 7-day withdrawal time (WDT). However, study of a higher dosage is desirable because of the possible increase of antimicrobial resistance and disease spectrum. Tissue DC residues exceeding the current maximum residue levels (MRL) was our major concern.(More)
The sequence at the hemagglutinin (HA) cleavage site (CS) plays a key role in determining the pathogenicity of avian influenza viruses. Three types of HA CS sequences, QREKR/GL, QRKKR/GL and QRRKR/GL, were previously reported in Taiwanese H5N2 viruses that were isolated from chickens from 2003 to 2013. However, no HA CS sequence was reported for viruses(More)
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