Theileriosis is caused by Theileria spp. Parasites which transmitted by various
species of ticks including Amblyomma, Haemaphysalis, Hyalomma and Rhipicephalus. This
pathogen can be found in red blood cells and white blood cells of farmed animals, including
cattle, buffaloes, goats and sheep. Theileria spp. leads to a high morbidity in small ruminants,
economic loss in agricultural production and time spent on infection prevention. It is necessary
to detect the infection in a farm, as there are generally no clearly recognisable clinical signs.
Our results revealed that infected animals displayed 230 bp DNA fragments, which is the
length of the V4 region of the 18S rRNA gene of Theileria spp. The overall prevalence of
Theileria spp. in ruminants farmed in Sa Kaeo Province, the border between Thailand and
Cambodia, was 9% (29/314). The prevalence of Theileria spp. in meat cattle (6%),
buffaloes(6%), meat goats (6%) and crossbred meat sheep (6%). It was also found that the
prevalence of Theileria spp. was linked to neither species nor gender (p>0.05). Polymerase
Chain Reaction was used to analyse Theileria spp. since it is very sensitive, specific and fast.
Our analysis can be used to prevent and control the spread of Theileria infection in ruminants.
Furthermore, this information may guide implemention of a policy on animal movement within
the border regions.