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  • Title: [Endoparasitic fauna and incidence of species in yearling and adult horses in Upper Bavarian breeding farms with regular anthelmintic prophylaxis lasting for many years].
    Author: Beelitz P, Gothe R.
    Journal: Tierarztl Prax Ausg G Grosstiere Nutztiere; 1997 Aug; 25(5):445-50. PubMed ID: 9441048.
    Abstract:
    In this epidemiological study 127 horses from five breeding farms in Upper Bavaria were included. The horses were coproscopically examined in intervals of four weeks over a 16-month period. Since 1992 in all farms regular prophylactic treatments with anthelmintics have been carried out. In 127 horses at least five species were established, such as Parascaris equorum, Anoplocephala perfoliata, Gasterophilus intestinalis and small strongyles, whose third stage larvae were characterized by eight or twelve intestinal cells. Infections with small strongyles occurred most frequently, followed by G. intestinalis, A. perfoliata and P. equorum. Seven horses excreted eggs of P. equorum, three yearlings, and a two, four, five and seven year old animal, each. 113 of the 127 examined horses showed infections with strongyles, hence, almost all animals of the farms I-V. The evaluation of horses with strongyle infections as regards to the frequency of the coproscopically established eggs revealed a high incidence independent of age. The maximal epg-values showed no obvious age-dependent differences varying between < or = 67 and 3733. The horses excreted strongyle eggs with epg-values of > or = 333 predominantly during the summer. With an epg-value of > or = 333, independently of age the 23 horses treated with Ivomec-P as well as 20 of the 24 horses given Banminth remained coproscopically negative three to four weeks after treatment. The animals treated with Rintal or Panacur continued to excrete strongyle eggs three to four weeks following the anthelmintic application. The use of anthelmintics in horses with epg-values < 333 revealed analogous results. Infections with A. perfoliata were established in all farms, altogether in 32 horses independently of the age of the animals. Eggs of G. intestinalis have been observed only in two farms, but almost in all horses there.
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