Dr. Murai Éva szerk.: Parasitologia Hungarica 12. (Budapest, 1979)

intermediate host for T. ovis in Europe. Forms infecting Central European roe deer have been assigned to the species T. cervi (BORCHERT, 1970). To elucidate morphological differences between C. ovis and "C. cervi"

, we examined cysticerci from sheep artificially infected with eggs of T. ovis in laboratory conditions in Australia (see RICKARD, 1975). The measurements and morphology of the sheep measles and the size and shape of the scolices and rostellar hooks show great resemblance to deer measles from Hungary (Figs. 1 and 7). These data indicate that the subspecies Taenia ovis krabbei and T. ovis ovis are different only with respect to the choice of intermediate host. 2. Cysticercus taeniae hydatigenae Pallas, 1766 (Figs. 9-16) (nec. C. tenuicollis Rudolphi, 1819 - see TENORA and VANEK, 1969) Intermediate hosts: Sus scrofa, Capreolus capreolus, Cervus elaphus, Dama dama, Ovis musimon. - Localization: Most often on the serous membranes of the mesentherium (omentum) in the abdominal cavity, less often on the surface of the liver, in the region of the pelvis and in the lungs. - Extensity: 71% in wild boar, 49% in roe deer, 41% in red deer, 20% in fallow deer, 26% in moufflon. - Intensity: 1-25 cysticerci per host. - Distributed all over Hungary (Tables 1-5). Description of thin-necked bladderworm:Transparent or yellowish-white bladder enclosed in a cyst, globular, about the size of a walnut or a small apple (10-70 mm in diameter) (Figs. 9-10). The cyst is entirely filled with the bladderworm (Fig. 11), into which a 3-5 mm neck and scolex project, or they are folded back at the anterior portion of the caudal bladder. The scolex may be seen through the wall of the cyst. The larva is full of a clear liquid. Diameter of the scolex is 0.8 mm, the diameter of the four suckers range from 0.28 to 0. 34 mm. The double circle of 26-36 hooks occurs on the rostellum (0. 40-0. 43 mm in diameter), large hooks 0.193-0. 235 mm long, small hooks 0. 127-0. 156 mm long. The size of the larva varies according to the size of the host, but there is no appreciable difference in the quality of the scolex and hooks. Average size and number of rostellar hooks in the various intermediate hosts are: in C. capreolus 31 hooks, 0. 214 and 0. 145 mm; in C. elaphus 30 hooks, 0. 213 and 0. 145 mm; in D. dama 32 hooks, 0. 208 and 0. 145 mm; in O. musimon 32 hooks, 0. 211 and 0.145 mm; in S. scrofa 31 hooks, 0. 206 and 0. 135 mm long. The shape of hooks is illustrated in Figs. 12-16. C. hydatigena

e also occurs in domesticated mammals (lesser ruminants and often in swine) in Hungary. With respect to morphology, there is no difference between bladderworms of wild and domesticated hosts. This species is significant from the veterinary aspect of wildlife management at times of heavy infection of theyoung game (Fig. 9). The young larvae penetrate the liver of roe deer fawn, red deer calves and wild boar piglets causing acute inflammation, as a result of which the young may eventually die. Definitive hosts for Taenia hydatigena are foxes and stray dogs. Adult worms were found in naturally infected dogs and foxes and individuals of those species were also succesfully infected by feeding them thin-necked bladderworms. Figs. 17-23: Coenurus cerebralis from Ovis musimon 17= Localization in the central nervous system; 18-19 = Scolices in the inner cyst wall with wrinkled stalks; 20= Rostellar hooks in natural position; 21 and 23= Form of rostellar hooks in well developed scolices; 22 = Young hooks Figs. 24-31: Protoscolices of Echinococcus granulosus from Sus scrofa 24 = Hydatid sand; 25 = Brood capsules; 26 = Some protoscolices with calcareous bodies; 27 = RosteUar crowns in natural position; 28-31 = Form of rostellar hooks under different magnifications (all hooks inBerlese medium; Figs 1-8 and 10-31: photo Murai, Fig. 9: photo Sugár)