Abstract
A new Respirovirus, Porcine parainfluenzavirus type 1 (PPIV-1) was first
identified in 2013 in Hong Kong and later in the USA. Here, we report
the first detection of PPIV-1 outside these two regions. Our research
group has analyzed 15–15 (3–3 piglets from five litters) nasal swab
samples obtained from three-week-old piglets originating from 22
Hungarian farms altogether from which only one farm was found to be
positive. Subsequently, 20–20 nasal swab samples were obtained from 2,
4, 6 and 8-week-old piglets of this farm. Virus detection by qRT-PCR
showed that although all investigated age groups were positive to
PPIV-1, higher number of infected animals and higher viral loads were
found among 4-year-old animals. Based on the phylogenetic analyses of
partial F and L genes, the 3 Hungarian strains are almost identical and
are highly similar to the very first PPIV-1 genome submitted from Hong
Kong in 2013, whereas the overall genetic difference compared to the
recently described North American isolates was around 10%.