Through the migrant health checkup, a total of 23 477 persons were tested, showing a positive rate of 0.7% (range: 0.1–2.7%) over years 2002–2017. Contact tracing both all mf cases in all three TAS yielded no positive cases. malayi mf among antibody positive children (0.3, 0.2 and 0.7% respectively). In Narathiwat TAS-1, TAS-2 and TAS-3 detected below transmission threshold rates for B. Stop-MDA surveys in 2006 in the 11 LF endemic provinces found nine mf positive cases in seven IUs in Narathiwat province with the highest prevalence of 0.8% (range: 0.1–0.8%). The annual national drug coverage with MDA over 2002–2012 was in the range of 68.0 to 95.4%. Additional annual rounds of MDA were required in 87 IUs of Narathiwat province from 2007 to 2011 due to persistent infection. ResultsĪ total of five rounds of MDA annually were implemented over 2002–2006 in all IUs. A 2001 survey of the chronic disease burden for LF established a register of the cumulative number of people with lymphedema/elephantiasis. malayi endemic provinces, annual surveys to detect LF reservoir in domestic cats commenced in 1994. Surveillance of migrant populations through the national migrant health checkup were intensified in seven provinces over 2002–2017 for LF antigenaemia using ICT test cards. Transmission assessment surveys (TAS) were conducted in 2012–2013, 20–2017 among school students in the 6–7-year age-group. In Narathiwat province, Stop-MDA surveys were done in 2011 using ELISA. Stop-MDA surveys were conducted in 2006 in the 11 LF endemic provinces among population over 6 years of age and children of ≤6 years using immunochromatographic test (ICT) for Wuchereria bancrofti antigen and microfilariae (mf) detection for Brugia malayi. The implementing unit (IU) was a sub-village. Mass drug administration (MDA) with diethylcarbamazine citrate (DEC) and albendazole (ALB) was implemented in a total of 357 implementation units (IUs) in 11 lymphatic filariasis (LF) endemic provinces. MethodsĪ baseline epidemiological survey was initiated in 2001 to identify both brugian and bancroftian filarial areas and delineate its endemicity. This article describes the intensive interventions with the National Programme for Elimination of Lymphatic Filariasis in Thailand since its launch in 2001 till the validation of its elimination in 2017. Lymphatic filariasis is endemic in nine of the eleven Member States of the World Health Organization South East Asia Region.
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