Kinetics of circulating human IgG4 after diethylcarbamazine and ivermectin treatment of bancroftian filariasis.
Patent filarial infections are associated with elevated levels of parasite-specific IgG4. This study investigated the shifts of filarial-specific human IgG and IgG4 antibodies after diethylcarbamazine and ivermectin treatment of bancroftian filariasis. Thirty adult Haitians were treated first with a 1-mg clearing dose of ivermectin and then with either one or two 200-micrograms/kg doses of ivermectin or with 12 daily 6-mg/kg doses of diethylcarbamazine. Posttreatment levels of antifilarial IgG4 were dependent on both treatment group and time of follow-up. IgG4 increased markedly to a maximum by day 30 in all treatment groups and then began to decrease; the greatest decrease was among diethylcarbamazine-treated patients. Posttreatment microfilaremia was inversely correlated with the decrease in IgG4; thus, shifts in IgG4 were associated with treatment response for all groups. Antifilarial IgG levels were not correlated with drug treatment and did not change to the same degree as did IgG4 responses.[1]References
- Kinetics of circulating human IgG4 after diethylcarbamazine and ivermectin treatment of bancroftian filariasis. Wamae, C.N., Roberts, J.M., Eberhard, M.L., Lammie, P.J. J. Infect. Dis. (1992) [Pubmed]
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