Swine in the Philippines have been found to act as reservoirs for
Reston virus, a filovirus related to Ebola and Marburg viruses. This was
discovered during an unusually severe outbreak of porcine reproductive
and respiratory syndrome. Reston virus was first identified in 1990
among non-human primates imported from the Philippines to several
primate handling facilities in the United States and Europe, but in
contrast to its African relatives Reston virus does not appear to cause
human illness, although there is ample evidence of Reston viral antibodies
in primate holding facilities31 and among those working with
swine