In puppies, clinically manifest parasitoses cause functional disorders
of the gastrointestinal tract, anemia (e. g. hookworm infections), ri
ckett-like symptoms (askaridiosis), dermatitis (uncinariosis, strongyl
oidosis, demodicosis) as well as encephalomyelitis, polyradiculitis, a
nd muscular disease (neosporosis). In addition, subclinical infestatio
n with parasites plays an important role for developmental disorders.
This is particularly true for askaridiosis. The earliest times of infe
ction of puppies differs for the various parasites. While toxocara can
is is in most cases transmitted already in the prenatal phase or via t
he lactogenic pathway during the first weeks of life (Stoye, 1983), in
festation with all other agents of parasitic diseases of puppies is po
ssible from the very first days post natum. It may become clinically m
anifest from the second to third week of life onwards depending on the
parasite.