Ocular Changes After Ivermectin - (DOLF IVM/Oncho)
Study Details
Study Description
Brief Summary
The DOLF Ocular Changes after Ivermectin study will investigate the kinetics of O. volvulus microfilaria (Mf) in the eye following treatment with ivermectin. The primary objective is to determine the proportion of participants with complete Mf clearance from the eye at 3 and 6 months following treatment with ivermectin (IVM).
Condition or Disease | Intervention/Treatment | Phase |
---|---|---|
|
N/A |
Detailed Description
This study will examine the kinetics of Mf clearance in the eye following ivermectin treatment. Previous studies have been unable to fully assess clearance Mf from the posterior chamber of the eye. This study will be the first to use optical coherence tomography (OCT) in patients with onchocerciasis to document parasites and pathology in the anterior and posterior chambers of the eye, and assess ocular changes following standard ivermectin treatment.
This will be a biomedical prospective cohort study.
The cohort will be stratified based on Mf levels to achieve approximately the following distribution of individuals with roughly one-third of participants in each group.
-
Individuals with positive skin snip Mf density of ≥ 1 Mf/mg), but no observable Mf in eyes using slit lamp and indirect ophthalmoscopy
-
Individuals with positive skin snip Mf density of ≥ 1 Mf/mg and 1-10 Mf in either eye at baseline (based on the highest number counted in either eye)
-
Individuals with positive skin snip Mf density of ≥ 1 Mf/mg and >10 Mf in either eye at baseline.
All participants recruited into the study will be treated with a single dose of ivermectin (150 ug/kg) by mouth under direct observation. This is the standard of care for treatment with onchocerciasis.
Participants will be evaluated following treatment with detailed parasitological and ocular examinations 7 days, 3 months and 6 months after treatment.
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
---|---|
Experimental: Ivermectin Single dose directly observed treatment with Ivermectin 3Mg Tab (150 ug/kg) delivered orally. |
Drug: Ivermectin 3Mg Tab
ivermectin tablet
|
Outcome Measures
Primary Outcome Measures
- Number of participants with complete microfilaria clearance from the eye at 3 months [3 months following treatment]
Microfilaria in the anterior chamber of the eye will be counted during slit lamp examination at time of assessment. Participants without Mf in the eye will be considered clear of infection in the eye.
- Number of participants with complete microfilaria clearance from the eye at 6 months [6 months following treatment]
Microfilaria in the anterior chamber of the eye will be counted during slit lamp examination at time of assessment. Participants without Mf in the eye will be considered clear of infection in the eye.
Secondary Outcome Measures
- The change from baseline in the number of microfilaria detected in the skin at 3 months [baseline, and 3 months following treatment]
Microfilaria (Mf) in the skin will be detected by skin snip microscopy. Up to four (4) skin snips using a corneoscleral punch will be weighed on an analytical balance and incubated for at least 8 hours in isotonic saline in a well of a flat-bottomed microtitre plate at ambient temperature. The Mf that have emerged will be counted using a microscope. Mf number and skin snip weight will be recorded. The mean skin microfilarial density will be calculated and recorded as mf/mg.
- The change from baseline in the number of microfilaria detected in the skin at 6 months [baseline, and 6 months following treatment]
Microfilaria (Mf) in the skin will be detected by skin snip microscopy. Up to four (4) skin snips using a corneoscleral punch will be weighed on an analytical balance and incubated for at least 8 hours in isotonic saline in a well of a flat-bottomed microtitre plate at ambient temperature. The Mf that have emerged will be counted using a microscope. Mf number and skin snip weight will be recorded. The mean skin microfilarial density will be calculated and recorded as mf/mg.
- The change from baseline in the number of microfilaria detected in the eye at 3 months [baseline, 3 months following treatment]
Microfilaria in the anterior chamber of the eye will be counted during slit lamp examination at time of assessment.
- The change from baseline in the number of microfilaria detected in the eye at 6 months [baseline, 6 months following treatment]
Microfilaria in the anterior chamber of the eye will be counted during slit lamp examination at time of assessment.
- Number of participants with complete microfilaria clearance from the skin at 3 months [3 months following treatment]
Microfilaria (Mf) in the skin will be detected by skin snip microscopy. Up to four (4) skin snips using a corneoscleral punch will be weighed on an analytical balance and incubated for at least 8 hours in isotonic saline in a well of a flat-bottomed microtitre plate at ambient temperature. The Mf that have emerged will be counted using a microscope. Mf number and skin snip weight will be recorded. Participants without Mf in the skin will be considered clear of infection in the skin.
- Number of participants with complete microfilaria clearance from the skin at 6 months [6 months following treatment]
Microfilaria (Mf) in the skin will be detected by skin snip microscopy. Up to four (4) skin snips using a corneoscleral punch will be weighed on an analytical balance and incubated for at least 8 hours in isotonic saline in a well of a flat-bottomed microtitre plate at ambient temperature. The Mf that have emerged will be counted using a microscope. Mf number and skin snip weight will be recorded. Participants without Mf in the skin will be considered clear of infection in the skin.
Other Outcome Measures
- Assess the utility of optical coherence tomography for evaluating the presence and clearance of Mf in the anterior and posterior segments of the eye. [baseline, 3 and 6 months following treatment]
Results from the optical coherence tomography (OCT) will be compared with slit lamp and other ocular examinations
- Evaluate ocular changes between baseline and 3 months following ivermectin treatment using OCT [baseline, and 3 months following treatment]
Results from the optical coherence tomography (OCT) will be compared in participants pre and post treatment
- Evaluate ocular changes between baseline and 6 months following ivermectin treatment using OCT [baseline, and 6 months following treatment]
Results from the optical coherence tomography (OCT) will be compared in participants pre and post treatment
Eligibility Criteria
Criteria
Inclusion Criteria:
- Have at least 1 palpable subcutaneous nodule (onchocercoma) and ≥ 1 Mf/mg of skin (by skin snip)
Exclusion Criteria:
-
Pregnancy and breastfeeding mothers within 1 month of giving birth
-
Have base line eye diseases including glaucoma, uveitis, severe keratitis, and/or cataracts that interfere with visualization of the posterior segment of the eye.
-
Prior allergic / hypersensitivity reactions or intolerance to ivermectin
-
Treatment with ivermectin in the past 6 (six) months
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
---|---|---|---|---|---|
1 | University of Health and Allied Sciences | Hohoe | Ghana |
Sponsors and Collaborators
- Washington University School of Medicine
- Case Western Reserve University
- University of Health and Allied Sciences
Investigators
- Principal Investigator: Gary Weil, MD, Washington University School of Medicine
- Principal Investigator: Christopher King, MD PhD, Case Western Reserve University
Study Documents (Full-Text)
None provided.More Information
Publications
- Anderson J, Fuglsang H. Further studies on the treatment of ocular onchocerciasis with diethylcarbamazine and suramin. Br J Ophthalmol. 1978 Jul;62(7):450-7.
- Anderson J, Fuglsang H. Ocular onchocerciasis. Trop Dis Bull. 1977 Apr;74(4):257-72. Review.
- Banla M, Tchalim S, Karabou PK, Gantin RG, Agba AI, Kére-Banla A, Helling-Giese G, Heuschkel C, Schulz-Key H, Soboslay PT. Sustainable control of onchocerciasis: ocular pathology in onchocerciasis patients treated annually with ivermectin for 23 years: a cohort study. PLoS One. 2014 Jun 2;9(6):e98411. doi: 10.1371/journal.pone.0098411. eCollection 2014.
- Basáñez MG, Pion SD, Boakes E, Filipe JA, Churcher TS, Boussinesq M. Effect of single-dose ivermectin on Onchocerca volvulus: a systematic review and meta-analysis. Lancet Infect Dis. 2008 May;8(5):310-22. doi: 10.1016/S1473-3099(08)70099-9. Review.
- Bird AC, Anderson J, Fuglsang H. Morphology of posterior segment lesions of the eye in patients with onchocerciasis. Br J Ophthalmol. 1976 Jan;60(1):2-20.
- Bird AC, el-Sheikh H, Anderson J, Fuglsang H. Changes in visual function and in the posterior segment of the eye during treatment of onchocerciasis with diethylcarbamazine citrate. Br J Ophthalmol. 1980 Mar;64(3):191-200.
- Bird AC, El-Sheikh H, Anderson J, Fuglsang H. Visual loss during oral diethylcarbamazine treatment for onchocerciasis. Lancet. 1979 Jul 7;2(8132):46.
- Braun G, McKechnie NM, Connor V, Gilbert CE, Engelbrecht F, Whitworth JA, Taylor DW. Immunological crossreactivity between a cloned antigen of Onchocerca volvulus and a component of the retinal pigment epithelium. J Exp Med. 1991 Jul 1;174(1):169-77.
- Chandrashekar R, Curtis KC, Weil GJ. Molecular characterization of a parasite antigen in sera from onchocerciasis patients that is immunologically cross-reactive with human keratin. J Infect Dis. 1995 Jun;171(6):1586-92.
- Chandrashekar R, Ogunrinade AF, Alvarez RM, Kale OO, Weil GJ. Circulating immune complex-associated parasite antigens in human onchocerciasis. J Infect Dis. 1990 Nov;162(5):1159-64.
- Dadzie KY, Bird AC, Awadzi K, Schulz-Key H, Gilles HM, Aziz MA. Ocular findings in a double-blind study of ivermectin versus diethylcarbamazine versus placebo in the treatment of onchocerciasis. Br J Ophthalmol. 1987 Feb;71(2):78-85.
- Diawara L, Traoré MO, Badji A, Bissan Y, Doumbia K, Goita SF, Konaté L, Mounkoro K, Sarr MD, Seck AF, Toé L, Tourée S, Remme JH. Feasibility of onchocerciasis elimination with ivermectin treatment in endemic foci in Africa: first evidence from studies in Mali and Senegal. PLoS Negl Trop Dis. 2009 Jul 21;3(7):e497. doi: 10.1371/journal.pntd.0000497.
- Donnelly JJ, Taylor HR, Young E, Khatami M, Lok JB, Rockey JH. Experimental ocular onchocerciasis in cynomolgus monkeys. Invest Ophthalmol Vis Sci. 1986 Apr;27(4):492-9.
- Duke BO. Human onchocerciasis--an overview of the disease. Acta Leiden. 1990;59(1-2):9-24. Review.
- Evans DS, Unnasch TR, Richards FO. Onchocerciasis and lymphatic filariasis elimination in Africa: it's about time. Lancet. 2015 May 30;385(9983):2151-2. doi: 10.1016/S0140-6736(15)61022-4.
- Fischer P, Kipp W, Bamuhiga J, Binta-Kahwa J, Kiefer A, Büttner DW. Parasitological and clinical characterization of Simulium neavei-transmitted onchocerciasis in western Uganda. Trop Med Parasitol. 1993 Dec;44(4):311-21.
- Fischer PU, King CL, Jacobson JA, Weil GJ. Potential Value of Triple Drug Therapy with Ivermectin, Diethylcarbamazine, and Albendazole (IDA) to Accelerate Elimination of Lymphatic Filariasis and Onchocerciasis in Africa. PLoS Negl Trop Dis. 2017 Jan 5;11(1):e0005163. doi: 10.1371/journal.pntd.0005163. eCollection 2017 Jan.
- Fuglsang H, Anderson J. Further observations on the relationship between ocular onchocerciasis and the head nodule, and on the possible benefit of nodulectomy. Br J Ophthalmol. 1978 Jul;62(7):445-9.
- Greene BM, Gbakima AA, Albiez EJ, Taylor HR. Humoral and cellular immune responses to Onchocerca volvulus infection in humans. Rev Infect Dis. 1985 Nov-Dec;7(6):789-95.
- Greene BM, Taylor HR, Brown EJ, Humphrey RL, Lawley TJ. Ocular and systemic complications of diethylcarbamazine therapy for onchocerciasis: association with circulating immune complexes. J Infect Dis. 1983 May;147(5):890-7.
- Greene BM, Taylor HR, Cupp EW, Murphy RP, White AT, Aziz MA, Schulz-Key H, D'Anna SA, Newland HS, Goldschmidt LP, et al. Comparison of ivermectin and diethylcarbamazine in the treatment of onchocerciasis. N Engl J Med. 1985 Jul 18;313(3):133-8.
- Herricks JR, Hotez PJ, Wanga V, Coffeng LE, Haagsma JA, Basáñez MG, Buckle G, Budke CM, Carabin H, Fèvre EM, Fürst T, Halasa YA, King CH, Murdoch ME, Ramaiah KD, Shepard DS, Stolk WA, Undurraga EA, Stanaway JD, Naghavi M, Murray CJL. The global burden of disease study 2013: What does it mean for the NTDs? PLoS Negl Trop Dis. 2017 Aug 3;11(8):e0005424. doi: 10.1371/journal.pntd.0005424. eCollection 2017 Aug.
- Johnson TP, Tyagi R, Lee PR, Lee MH, Johnson KR, Kowalak J, Elkahloun A, Medynets M, Hategan A, Kubofcik J, Sejvar J, Ratto J, Bunga S, Makumbi I, Aceng JR, Nutman TB, Dowell SF, Nath A. Nodding syndrome may be an autoimmune reaction to the parasitic worm Onchocerca volvulus. Sci Transl Med. 2017 Feb 15;9(377). pii: eaaf6953. doi: 10.1126/scitranslmed.aaf6953.
- Kamga GR, Dissak-Delon FN, Nana-Djeunga HC, Biholong BD, Mbigha-Ghogomu S, Souopgui J, Zoure HG, Boussinesq M, Kamgno J, Robert A. Still mesoendemic onchocerciasis in two Cameroonian community-directed treatment with ivermectin projects despite more than 15 years of mass treatment. Parasit Vectors. 2016 Nov 14;9(1):581.
- Kawabata M, Izui S, Anan S, Kondo S, Fukumoto S, Flores GZ, Kobayakawa T. Circulating immune complexes and their possible relevance to other immunological parameters in Guatemalan onchocerciasis. Int Arch Allergy Appl Immunol. 1983;72(2):128-33.
- Komlan K, Vossberg PS, Gantin RG, Solim T, Korbmacher F, Banla M, Padjoudoum K, Karabou P, Köhler C, Soboslay PT. Onchocerca volvulus infection and serological prevalence, ocular onchocerciasis and parasite transmission in northern and central Togo after decades of Simulium damnosum s.l. vector control and mass drug administration of ivermectin. PLoS Negl Trop Dis. 2018 Mar 1;12(3):e0006312. doi: 10.1371/journal.pntd.0006312. eCollection 2018 Mar.
- Lamberton PH, Cheke RA, Winskill P, Tirados I, Walker M, Osei-Atweneboana MY, Biritwum NK, Tetteh-Kumah A, Boakye DA, Wilson MD, Post RJ, Basañez MG. Onchocerciasis transmission in Ghana: persistence under different control strategies and the role of the simuliid vectors. PLoS Negl Trop Dis. 2015 Apr 21;9(4):e0003688. doi: 10.1371/journal.pntd.0003688. eCollection 2015 Apr.
- Opoku NO, Bakajika DK, Kanza EM, Howard H, Mambandu GL, Nyathirombo A, Nigo MM, Kasonia K, Masembe SL, Mumbere M, Kataliko K, Larbelee JP, Kpawor M, Bolay KM, Bolay F, Asare S, Attah SK, Olipoh G, Vaillant M, Halleux CM, Kuesel AC. Single dose moxidectin versus ivermectin for Onchocerca volvulus infection in Ghana, Liberia, and the Democratic Republic of the Congo: a randomised, controlled, double-blind phase 3 trial. Lancet. 2018 Oct 6;392(10154):1207-1216. doi: 10.1016/S0140-6736(17)32844-1. Epub 2018 Jan 18. Erratum in: Lancet. 2018 Oct 6;392(10154):1196.
- Progress report on the elimination of human onchocerciasis, 2015-2016. Wkly Epidemiol Rec. 2016 Oct 28;91(43):505-14. English, French.
- Rodríguez-Pérez MA, Fernández-Santos NA, Orozco-Algarra ME, Rodríguez-Atanacio JA, Domínguez-Vázquez A, Rodríguez-Morales KB, Real-Najarro O, Prado-Velasco FG, Cupp EW, Richards FO Jr, Hassan HK, González-Roldán JF, Kuri-Morales PA, Unnasch TR. Elimination of Onchocerciasis from Mexico. PLoS Negl Trop Dis. 2015 Jul 10;9(7):e0003922. doi: 10.1371/journal.pntd.0003922. eCollection 2015.
- Semba RD, Murphy RP, Newland HS, Awadzi K, Greene BM, Taylor HR. Longitudinal study of lesions of the posterior segment in onchocerciasis. Ophthalmology. 1990 Oct;97(10):1334-41.
- Taylor HR, George T. Microfilaria in the cornea in onchocerciasis. Trans R Soc Trop Med Hyg. 1987;81(1):148.
- Taylor HR, Murphy RP, Newland HS, White AT, D'Anna SA, Keyvan-Larijani E, Aziz MA, Cupp EW, Greene BM. Treatment of onchocerciasis. The ocular effects of ivermectin and diethylcarbamazine. Arch Ophthalmol. 1986 Jun;104(6):863-70.
- Taylor HR, Semba RD, Newland HS, Keyvan-Larijani E, White A, Dukuly Z, Greene BM. Ivermectin treatment of patients with severe ocular onchocerciasis. Am J Trop Med Hyg. 1989 May;40(5):494-500.
- Taylor HR. Ivermectin treatment of ocular onchocerciasis. Acta Leiden. 1990;59(1-2):201-6. Review.
- Taylor HR. Onchocerciasis. Int Ophthalmol. 1990 May;14(3):189-94. Review.
- Taylor MJ, Awadzi K, Basáñez MG, Biritwum N, Boakye D, Boatin B, Bockarie M, Churcher TS, Debrah A, Edwards G, Hoerauf A, Mand S, Matthews G, Osei-Atweneboana M, Prichard RK, Wanji S, Adjei O. Onchocerciasis Control: Vision for the Future from a Ghanian perspective. Parasit Vectors. 2009 Jan 21;2(1):7. doi: 10.1186/1756-3305-2-7.
- Thomsen EK, Sanuku N, Baea M, Satofan S, Maki E, Lombore B, Schmidt MS, Siba PM, Weil GJ, Kazura JW, Fleckenstein LL, King CL. Efficacy, Safety, and Pharmacokinetics of Coadministered Diethylcarbamazine, Albendazole, and Ivermectin for Treatment of Bancroftian Filariasis. Clin Infect Dis. 2016 Feb 1;62(3):334-341. doi: 10.1093/cid/civ882. Epub 2015 Oct 20.
- Traoré S, Wilson MD, Sima A, Barro T, Diallo A, Aké A, Coulibaly S, Cheke RA, Meyer RR, Mas J, McCall PJ, Post RJ, Zouré H, Noma M, Yaméogo L, Sékétéli AV, Amazigo UV. The elimination of the onchocerciasis vector from the island of Bioko as a result of larviciding by the WHO African Programme for Onchocerciasis Control. Acta Trop. 2009 Sep;111(3):211-8. doi: 10.1016/j.actatropica.2009.03.007. Epub 2009 Mar 31. Review.
- Wojtkowski M, Bajraszewski T, Gorczyńska I, Targowski P, Kowalczyk A, Wasilewski W, Radzewicz C. Ophthalmic imaging by spectral optical coherence tomography. Am J Ophthalmol. 2004 Sep;138(3):412-9.
- Zarroug IM, Hashim K, ElMubark WA, Shumo ZA, Salih KA, ElNojomi NA, Awad HA, Aziz N, Katabarwa M, Hassan HK, Unnasch TR, Mackenzie CD, Richards F, Higazi TB. The First Confirmed Elimination of an Onchocerciasis Focus in Africa: Abu Hamed, Sudan. Am J Trop Med Hyg. 2016 Nov 2;95(5):1037-1040. Epub 2016 Jun 27.
- Zimmerman PA, Dadzie KY, De Sole G, Remme J, Alley ES, Unnasch TR. Onchocerca volvulus DNA probe classification correlates with epidemiologic patterns of blindness. J Infect Dis. 1992 May;165(5):964-8.
- 201804116