Ascaris suum is widely distributed in countries where pigs are raised intensively and extensively. In Timor Leste, the prevalence of this worm has never been reported. The objective of this research is to measure the prevalence of A. suum in Timor Leste. The determination of sample size was done using the methód of Cannon & Roe (1982). Site selection is done using the methód of random sampling and sample selection is done using convenient sampling. The result of the survey indicates that the overall prevalence of A. suum in this survey was 29.86%. Prevalence of A. suum at district level was 27.08% in Aileu, 20.83% in Bobonaro and 41.67% in Viqueque. Amaral, A. C. and da Costa Freitas, J. (2015) ‘How common is Ascaris suum in pigs in Timor Leste?’, Revista Cientifica Veritas, 3(2), pp. 52–60.
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