Coccidia infections in Danish farmed mink

Heidi Huus Petersen, Mariann Chriél, Mette Sif Hansen

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    Abstract

    Although Danish farmed mink are frequently infected with Coccidia, knowledge of factors affecting the infection is scarce. Thus, we studied age, geographical and season-related factors affecting coccidia prevalence. Unsporulated oocysts excretion was quantified microscopically (n=4142) every 7-14th day (April-October 2016) from bitches and cups on 30 farms (n=335 mink) from South- or North Jutland, or Zealand. Minimum once, 60.9% (n=204) mink excreted Eimeria, 56.7% (n=190) Isospora and 20.9% (n=70) excreted both coccidia. Positive mink were identified on all farms. Eimeria prevalence was higher on the Zealand farms (25.4±2.2%, P<0.0001) compared to South- and North Jutland farms (5.4±2.9%; 7.5±4.1%). Isospora prevalence was similar regardless of farm locality (12.2±2.9%, 11.8±3.5%, 9.2±7.1%). Eimeria prevalence peaked in June-July (12.6%-24.9%), while Isospora prevalence peaked in July-August (12.1%-27.6%). More cups (19.5%) than bitches (4.6%) were Isospora positive, while Eimeria prevalence was similar for cups (15.7%) and bitches (10.5%). For cups, Eimeria prevalence peaked when cups were 7-11 weeks old and again when 18-24 weeks old. Isospora prevalence peaked in cups 13-15 weeks old. Three Eimeria types were characterized by size and wall thickness (unverified by PCR); A, B and C. Types B and C (40.9%, 39.8%) were more prevalent than A (19.3%). Bitches were primarily infected with type B (50.4%), while type C (48.0%) predominated in cups. Type B infections dominated in mink from Zealand (56.5±13.7%), while mink from Jutland were primarily infected with type C (55.6±28.6%; 81.9±19.4%). Farmed mink showed high coccidia prevalence with seasonal- and age-related Isospora prevalence, and seasonal- and geographical-related Eimeria prevalence.
    Original languageEnglish
    Publication date2017
    Publication statusPublished - 2017
    Event26th International Conference of World Association for the Advancement of Veterinary Parasitology (WAAVP): Combating Zoonoses: Strength in East-West Partnership - Kuala Lumpur Convention Centre, Kuala Lumpur, Malaysia
    Duration: 4 Sep 20178 Sep 2017

    Conference

    Conference26th International Conference of World Association for the Advancement of Veterinary Parasitology (WAAVP)
    LocationKuala Lumpur Convention Centre
    CountryMalaysia
    CityKuala Lumpur
    Period04/09/201708/09/2017

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