infection

If that proportion is greater than 9 0 % in both treatment groups, the primary endpoint will be the occurrence of mixed infections.

Factors affecting infections of mammals with intraerythrocytic protozoa.

The parasites all occurred as natural infections in the eyes of perch.

Results from the model system presented here demonstrate the potential of acquired immune responses to regulate nematode infections.

Even if colonization rate is low, a snail population can develop high trematode prevalence, if infections persist long and the host is long-lived and abundant.

Table 3 shows that there was no significant difference between the total number of worms of each species present in the concurrent and control infections.

If differential susceptibility on the part of the parasites were important, one would expect mixed infections of living and dead parasites to be relatively common.

Respiratory infections (12/137), anxiety or panic symptoms (4/137) and sleeping problems (6/137) formed minor groups.

Freshwater-adapted schistosome cercariae that emerge from snail hosts undergo profound changes when they penetrate skin to initiate infections.

In the experiment, clonal diversity of the donor and recipient infections was not determined directly.

Parasites that had not reached the mature metacercariae stage were assumed to be experimental infections.

Conditions under which single- and multiple-species infections can accumulate are considered.

They were continuous except for the 2nd-5th months of egg production in primary infections, when direct observations were made for 7 days per month.

Little information exists on the potential effectiveness of amphibian defensive responses against helminth infections.

Reduced host reproductive success was suggested to be directly due to the genetic heterogeneity of the parasitic infections resulting in increased host defence costs.