2.8 Study level information
The country where study was conducted, year of sample collection, type
of study (clinical trial and observational studies including
case-control study, cross-sectional study, case reports, ecologic study,
pig age group(s), clinical signs, type of animal sample collected
(feces, oropharyngeal, oral fluids, serum), type of environmental sample
collected (pen, feeder, pit, hallway, load out chutes, etc.), number of
samples tested, percentage of samples testing positive, type of
diagnostic tools reported (PCR, in situ assays, and serology) and
gross & histologic lesions reports were collected.