Effect of Concomitant Mansonella Perstans Microfilaremia on Immune Responses Following Single Dose Praziquantel in People With Schistosomiasis

Summary

Background: Schistosomiasis is a chronic infection. It is caused by parasitic worms called Schistosoma haematobium (Sh) that are spread by snails that live in rivers. It can lead to liver problems or bladder cancer. Praziquantel (PZQ) is a drug used to treat this infection. After taking it, some people develop increased resistance to reinfection with Sh. Some people with Sh infection can be infected with another worm called Mansonella perstans (Mp). Mp is spread through a biting insect called a midge. It rarely causes symptoms. However, researchers think that Mp infection could affect the body s response to PZQ treatment for or risk of reinfection with Sh. Objective: To find out the effects of Mp infection on the response to PZQ treatment for Sh infection. Eligibility: Men and women ages 14-80 who: * Live in Tieneguebougou, Bougoudiana, or surrounding villages in Mali * Are not pregnant * Have Sh infection * Have no other chronic medical conditions Design: * Participants will be screened with: * Medical history * Physical exam * Blood and urine tests * Stool samples * Participants will be treated with a single dose of PZQ by mouth. * After receiving PZQ, participants will return to the clinic for blood and urine tests at the following times: * 4, 8, 24, 48, and 72 hours later * 5, 7, 9, and 14 days later * 1, 3, and 6 months later Participants who are infected with Sh at the 6-month visit will get another treatment with PZQ. ...

Timeline

Start

2016-04-06

Primary completion

2018-12-14

Completion

2018-12-14

Publications

• Background Dolo H, Coulibaly YI, Dembele B, Konate S, Coulibaly SY, Doumbia SS, Diallo AA, Soumaoro L, Coulibaly ME, Diakite SA, Guindo A, Fay MP, Metenou S, Nutman TB, Klion AD. Filariasis attenuates anemia and proinflammatory responses associated with clinical malaria: a matched prospective study in children and young adults. PLoS Negl Trop Dis. 2012;6(11):e1890. doi: 10.1371/journal.pntd.0001890. Epub 2012 Nov 1.
• Background Fitzsimmons CM, Joseph S, Jones FM, Reimert CM, Hoffmann KF, Kazibwe F, Kimani G, Mwatha JK, Ouma JH, Tukahebwa EM, Kariuki HC, Vennervald BJ, Kabatereine NB, Dunne DW. Chemotherapy for schistosomiasis in Ugandan fishermen: treatment can cause a rapid increase in interleukin-5 levels in plasma but decreased levels of eosinophilia and worm-specific immunoglobulin E. Infect Immun. 2004 Jul;72(7):4023-30. doi: 10.1128/IAI.72.7.4023-4030.2004.
• Background Keiser PB, Coulibaly YI, Keita F, Traore D, Diallo A, Diallo DA, Semnani RT, Doumbo OK, Traore SF, Klion AD, Nutman TB. Clinical characteristics of post-treatment reactions to ivermectin/albendazole for Wuchereria bancrofti in a region co-endemic for Mansonella perstans. Am J Trop Med Hyg. 2003 Sep;69(3):331-5.

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