Fróðskaparrit - 31.12.2000, Síða 185

SNIKAR A SEYðl I FØROYUM
189
al, 1987), it was expected that H. contortus
would not be present in the Faroe Islands.
This is also consistent with a lack of find-
ings in similar climatic areas: Iceland
(Richter, 1974), Greenland (Rose, 1990),
and on the island of St. Kilda in the Outer
Hebrides (Gulland and Fox, 1992).
Nematodes and cestodes
in the small intestine
Trichostrongylus vitrinus was found in
every lamb in this study. Although there
were significant differences in the numbers
from one location to another, the results in-
dicate that these parasites are widespread in
the Faroe Islands.
Nematodirus spp. were numerous in
most lambs examined in the autumn of
1998. The species identified were N. battus
and N. filicollis. N. battus is a relatively
“new” parasite. Records indicate that it
originally was restricted to the British Isles,
as it was first described there in 1951
(Crofton and Thomas, 1951). Then, it
seemed to spread to several countries in Eu-
Fig. 27. Muellerius capillaris. Lesions in lung.
Mynd 27. Muellerius capillaris. Broytingar í lunga.
rope: Norway in 1961 (Helle, 1969), the
Netherlands (Borgsteede etal., 1978), Den-
mark (Thamsborg etal., 1996),andin 1984
to the U.S.A. (Hoberg et al., 1986). It is
not known when N. battus was introduced
to the Faroe Islands, but sheep imported
from Scotland to the Faroe Islands in 1961
are a likely source of cont.amina.tion.
Moniezia expansa is considered cos-
mopolitan. In this study, it is verified that
the tapeworm is present in the Faroe Is-
lands. Other observations made by the au-
thor indicate that it is common. Moniezia
spp. is generally regarded as of little patho-
genic significance.
Nematodes in the large intestine
Trichuris ovis, Chabertia ovina, and Oe-
sophagostomum venulosum were found in
small numbers in the examined lambs.
These parasites are usually not considered
as pathogenic to sheep, unless they are pre-
sent in considerable numbers.
Nematodes in the lungs
Muellerius capillaris is a very common ne-
- preclpitation ""Temperature
200 -
/\ /
—«—-w '*—«— \ v,-
-*
1 2 3 4 5 6 7 8 month 9 10 11 12
Fig. 28. Mean temperatures and precipitation pr
month. 1961 to 1990 (Cappelen and Laursen, 1998).
Mynd 28. Miðalhiti og -avfall um mánaðin frá 1961 tii
1990 (Cappelen and Laursen, 1998).