Allocating plenty of resources towards the treatment of mergansers predicted a sharp drop in infected birds, which then remained close to zero throughout the remainder of the residency period.Regardless of the time and monetary resources available, praziquantel treatment frequency should increase as mergansers arrive on the lake with continued treatments (albeit at reduced levels) until the end of the residency period.Results from the study may help identify treatment protocols that lower merganser infection rates and ultimately reduce the occurrence of swimmer's itch in freshwater systems throughout the Midwest.
Optimal control of bird hosts is defined analytically and we include numerical simulations assuming different resource‐allocation strategies. Our goal is to identify merganser treatment regimes that minimize the number of infected snails thereby reducing the risk of human infections. We construct a mathematical model of swimmer's itch and its treatment within the infected merganser population. Although previous attempts at controlling swimmer's itch have targeted snails, a handful of efforts have concentrated on treating water birds with the anthelmintic drug, praziquantel. Past study has identified the common merganser as a key definitive host for these worms in the United States a number of snail species serve as intermediate hosts. Concerns about this issue have been growing recently due to an apparent increase in the global occurrence of swimmer's itch and its subsequent impacts on recreational activities and associated revenues.
HIGGINS LAKE SWIMMERS ITCH 2019 SKIN
When parasite larvae penetrate human skin they initiate localized inflammation that leads to intense itching. Swimmer's itch is an emerging disease caused by flatworm parasites that often use water birds as definitive hosts.
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