Sutida Punstitwong. Prevalence and intensity of helminth and protozoa in swine feces from municipal abattoirs in the central region of Thailand . Master's Degree(Infectious Diseases and Epidemiology). Mahidol University. : Mahidol University, 2007.
Prevalence and intensity of helminth and protozoa in swine feces from municipal abattoirs in the central region of Thailand
Abstract:
Because pork is a commonly consumed meat, many pigs are sent to abattoirs to be
killed. In each meat consumption thus numerous of swine are sent to abattoirs where alive
swine is killed to be pork. In each slaughtering process, especially the cleaning of
intestines, humans are exposed to parasites which can infect them.
This research was carried out to study the prevalence and intensity of helminth and
protozoa in swine feces from municipal abattoirs in the central region of Thailand. 308
fecal samples were collected from swine slaughtered in 33 abattoirs to detect and
determine the number of parasites. The Modified formalin detergent technique method
was applied. The prevalence rate of parasites was found to be 38.0%, 14.0% for helminth
and 28.6% for protozoa. Of the total swine fecal sample that were positive for helminth
and protozoa 10.7%(100-3,400 eggs/g) had Ascaris suum, 2.3%(200 eggs/g) had strongyle
egg, 1.3%(200 eggs/g) had Trichuris suis, 0.6% (200 eggs/g) had rhabditiform
larva,15.6% (100-8,800 eggs/g) had Balantidium coli and 16.9%(102-1.37 eggs/g) had
unsporulated Eimeria and/or Isospora oocyst . The result of a retrospective study
regarding risk factors from swine farms (57 swine slaughtered) found below standard
farms had a higher risk of infection with helminth and protozoa than standard farms (OR =
0.06, 95%CI = 0.02-0.06). Small and medium size farms were at risk of contamination
with helminth and protozoa than a large farms (OR = 0.13, 95%CI = 0.04-0.42). Swine
raised with commercial feed were higher at risk of contamination with helminth and
protozoa than those raised with mixture feed (OR = 0.14, 95%CI = 0.04-0.47). Surface
water raised swine had a higher risk of contamination with helminth and protozoa than
those raised on underground water (OR = 0.22, 95%CI = 0.06-0.77). Managing the risk of
infection by selling sick swine was a poor method than curing swine (OR = 4.86, 95%CI =
1.50-15.79). Gender of and having a veterinarian were not significantly associated with
parasite infection. Based on the results of this study, prevention and control of parasites
should be done at the farm level