FIGURE LEGENDS
Fig 1: Number of PRDS cases reported in Thoroughbred racehorses competing on
the Highveld of South Africa from 1987 to 2013.
Fig 2: Total monthly cases of PRDS in Thoroughbred racehorses competing in the
Central Province Racing District of South Africa from 1987 to 2013 and average
monthly maximum temperature.
Fig 3: Prevalence of PRDS in racehorses competing over different distances from
1987 to 2013. The Relative Risk of PRDS associated with competing in races over
1201-1600m was 1.22 (P<0.0001) whilst that associated with competing in races of
more than 1600m was 1.42 (P<0.0001) when compared to competing in races of
less than 1200m.
Fig 4: Prevalence of PRDS in racehorses of various ages competing in races from
1987 to 2013. The average prevalence (0.23 %) is indicated by the dotted line.
Proceedings
of
the
South
African
Equine
Veterinary
Association
Congress
2016
31