Effect of fenbendazole in water on pigs infected with Ascaris suum in finishing pigs under field conditions.

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Lassen , B , Oliviero , C , Orro , T , Jukola , E , Laurila , T , Haimi-Hakala , M & Heinonen , M 2017 , ' Effect of fenbendazole in water on pigs infected with Ascaris suum in finishing pigs under field conditions. ' , Veterinary Parasitology , vol. 237 , pp. 1-7 . https://doi.org/10.1016/j.vetpar.2017.03.005

Title: Effect of fenbendazole in water on pigs infected with Ascaris suum in finishing pigs under field conditions.
Author: Lassen, Brian; Oliviero, Claudio; Orro, Toomas; Jukola, Elias; Laurila, Tapio; Haimi-Hakala, Minna; Heinonen, Mari
Contributor organization: Departments of Faculty of Veterinary Medicine
Production Animal Medicine
Mari Heinonen / Principal Investigator
Research Centre for Animal Welfare
Animal Reproduction Science
Teachers' Academy
Date: 2017-03-06
Language: eng
Number of pages: 7
Belongs to series: Veterinary Parasitology
ISSN: 0304-4017
DOI: https://doi.org/10.1016/j.vetpar.2017.03.005
URI: http://hdl.handle.net/10138/310609
Abstract: The husbandry of pigs for meat production is a constantly developing industry. Most studies on the effects of Ascaris suum infection in pigs and its prevention with anthelmintics are over a decade old. We examined the effect of 2.5 mg fenbendazole per kg bodyweight administered in drinking water for two consecutive days on A. suum infection 1 and 6 weeks after pigs arrived to fattening units. We hypothesised that the treatment would reduce the presence of A. suum-infections, improve the average daily weight gain of pigs, reduce the percentage of liver rejections in pens by 50% and increase the lean meat percentage at slaughter by 1%. The study included a placebo group (427 pigs) and a treatment group (420 pigs) spanning four different farms previously reporting ≥15% liver rejection. The treatment was given for 2 consecutive days 1 and 6 weeks after the pigs arrived to the fattening unit. Faecal samples were collected during weeks 1, 6 and 12 from all pigs and examined for A. suum eggs. Blood was collected during weeks 1 and 12 from a subgroup of the pigs and examined for anti-A. suum antibodies and clinical blood parameters. Data on liver rejection and lean meat percentage were collected post-mortem. The proportion of Ascaris seropositive pigs changed from 8.6% to 22.2% and 20.3% to 16.3% in the placebo and treatment group respectively. Fenbendazole reduced the presence of A. suum eggs in faeces the percentage of liver rejections by 69.8%. The treatment did not affect daily weight gain or lean meat percentage. Pigs with A. suum eggs in faeces at week 6 had a lower average daily weight gain of 61.8 g/day compared with pigs without parasite eggs. Fenbendazole treatment may be a useful option for farms struggling with persistent A. suum problems and demonstrate a beneficial effect on the weight gain of the animals shedding eggs in faeces and result in fewer condemned livers at slaughter.
Subject: 413 Veterinary science
Ascaris suum
swine
Anthelmintics
Fenbendazole
Liver rejection
Milk spots
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: acceptedVersion


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