{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T01:20:52Z","timestamp":1792027252372,"version":"4.4.0"},"reference-count":27,"publisher":"American Society of Tropical Medicine and Hygiene","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2010,7]]},"abstract":"<jats:p>The northern Chiapas onchocerciasis focus has undergone 11 years of ivermectin mass treatment. No evidence of microfilariae in the cornea and\/or anterior chamber of the eye or in skin snips was seen in residents examined in 2006 in two sentinel communities (upper limit of the 95% confidence interval [UL 95% CI] = 0.5% and 0.3%, respectively). In children 10 and under, 0 of 305 were found to harbor antibodies to Ov16, a marker of parasite exposure; 0 of 4,400 <jats:italic>Simulium ochraceum<\/jats:italic> s.l. collected in 2005 contained parasite DNA, giving an UL 95% CI for the infective rate of 0.9\/2,000, and an UL 95% CI of the seasonal transmission potential of 1.2 L3\/person. These data, assumed to be representative of the focus as a whole, suggest that there is no ongoing transmission of <jats:italic>Onchocerca volvulus<\/jats:italic> in the northern Chiapas focus. Community-wide treatments with ivermectin were halted in 2008, and a post-treatment surveillance phase was initiated.<\/jats:p>","DOI":"10.4269\/ajtmh.2010.09-0626","type":"journal-article","created":{"date-parts":[[2010,7,1]],"date-time":"2010-07-01T16:25:01Z","timestamp":1278001501000},"page":"15-20","source":"Crossref","is-referenced-by-count":14,"title":["Lack of Active Onchocerca volvulus Transmission in the Northern Chiapas Focus of Mexico"],"prefix":"10.4269","volume":"83","author":[{"given":"Mario A.","family":"Rodr\u00edguez-P\u00e9rez","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas R.","family":"Unnasch","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alfredo","family":"Dom\u00ednguez-V\u00e1zquez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alba L.","family":"Morales-Castro","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frank","family":"Richards","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Graciela P.","family":"Pe\u00f1a-Flores","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mar\u00eda Eugenia","family":"Orozco-Algarra","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gibert","family":"Prado-Velasco","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2795","reference":[{"key":"R1","series-title":"Onchocerciasis Elimination Program for the Americas","author":"OEPA","year":"2008"},{"key":"R2","series-title":"Salud Publica Mex","first-page":"683","article-title":"Historia de la oncocercosis","volume":"21","author":"Fern\u00e1ndez de 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