Íslenskar landbúnaðarrannsóknir - 01.09.1974, Side 23
SHEEP PARASITES IN ICELAND 21
Larvae pr.g
faeces
Muellerius Dictiocaulus % o.f sheep carrying _
capillaris filaria Moniezia expansa
100- h5 •
0-
Fig. 16. A hypothesis concerning the following factors in faeces from sheep: The variation in the
number of Eimeria ovocysts, the variation in the number of eggs of Nematodirus spp. and „other
strongyles", the variation in the number of larvae of Mullerius capillaris and Dictyocaulus filaria,
the frequency in occurence of Moniezia expansa and the variation in faecal consistency. All factors
are put in xelation to thethe age of the sheep and time of year.
REFERENCES
Ayalew, L. and H. C. Gibby. Seasonal fluctua-
tions in breeding ewes and lambs. Canad. J.
Comp. Med. 1973, 37 (1), 79—89.
Connan, R. M.: The post-parturient rise in faecal
nematode egg count of ewes; its aetiology and
epidemiological significance. World Rev. Anim.
Prod. 1968a, 4 (16), 53—57.
Connan, R. M.: Studies on the worm populations
in the alimentary tract of breeding ewes. J.
Helminth. 1968g, 42, 9—28.
Dunsmore, J. D.: Ostertagia spp. in lambs and
pregnant ewes. J. Helminth. 1965, 39, 159—
184.
Field, A. C., M. R. Brambell and J. Allan Camp-
bell: Spring rise in faecal worm-egg counts of
housed sheep and its importance in nutritional
experiments. Parasitology 1960, 50, 387—399.
Gibbs, H. C.: Some factors involved in the „spring
rise" phenomenon in sheep. Proc. 3rd Int.
Conf. Wld. Assoc. Adv. vet. Parasit. 1967, ln
„The reaction of the host to parasitism", 160
—173.
Gíslason, G.: Ormar í búfé á Islandi (Helminths
in farm animals in Iceland) Læknablaðið 1968,
54 (1), 19—32. Engl. summ.
Helle, O.: The effect on sheep parasites of grazing