engleski

Characteristics of fascioloidosis in cervids from Bjelovarsko-bilogorska County: a three year study

Fascioloidosis is a parasitic disease caused by invasive, allien trematode Fascioloides magna. Since its initial description in Baranja region in 2002, fascioloidosis has spread through majority of lowland and hilly habitats in Croatia, including Bjelovarsko-bilogorska County. During the three year period we have analyzed 217 red deer livers and 355 roe deer livers. Each liver was sectioned at approx. 2 cm thick slices, and thoroughly examined for gross lesions and various developmental stages of fl ukes. Determined total prevalence of infected livers was 65.4% in red deer and 11.3% in roe deer. According to hunting units, recorded prevalence in Bjelovar was 46.2% in red deer and 5.6% in roe deer, Grubišno polje (91.2% ; 20.0%), Daruvar (77.8% ; 13.9%), Garešnica (55.3% ; 30.9%) and Čazma (63.6%, 11.1%). Determined stages of the parasite in total were as follows: migratory stages – average 1.87 (max. 12), juvenile fl uke – 1.64 (max. 12), adult fl uke – 6.93 (48), pseudocyst 3.58 (24), destroyed pseudocyst – 2.35 (76). Highest average number of migratory stages and juvenile fl ukes was determined in Grubišno polje unit (2.57 ; 1.93), adult fl ukes and pseudocyst in Daruvar unit (11.93 ; 6.03), and destroyed pseudocyst in Grubišno polje unit (4.59). Our results suggest that Bjelovar unit is least contaminated which corresponds to the number of red deer as defi nitive host. In the same time average number of destroyed and active pseudocysts shows positive eff ects of treatment in Grubišno polje unit. Highest risk of infection is present in Grubišno polje and Daruvar units.

red deer, Fascioloides magna, Bjelovarsko-bilogorska County, gross lesions

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