Publications (5)11.17 Total impact
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Article: Efficacy of artemisinin-based combination therapy for treatment of persons with uncomplicated Plasmodium falciparum malaria in West Sumba District, East Nusa Tenggara Province, Indonesia, and genotypic profiles of the parasite.
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ABSTRACT: Reports on treatment failures associated with the use of first-and second-line antimalarial drugs chloroquine and sulfadoxine-pyrimethamine have recently increased in many parts of Indonesia. The present study evaluated artemisinin-based combination therapy for treatment of persons with uncomplicated Plasmodium falciparum malaria in West Sumba District, East Nusa Tenggara Province. A total of 103 persons 1-57 years of age were enrolled, given standard artesunate-amodiaquine therapy, and followed-up for 28 days. All persons clinically recovered, but two persons were again parasitemic on day 7. This finding indicated that these two persons had recurrent parasitemias on days 21 and 28. Molecular analyses suggested both recurrences were caused by reinfections. There were no severe adverse events, but complaints of gastrointestinal upset, nausea and vomiting, and headache linked to therapy occurred among 9.7%, 5.8% and 5.8% of the persons, respectively. Artesunate-amodiaquine proved efficacious therapy for treatment of persons with uncomplicated P. falciparum malaria at one site in eastern Indonesia but it may have tolerability problems that merit further investigation.The American journal of tropical medicine and hygiene 07/2009; 80(6):914-8. · 2.59 Impact Factor -
Article: Malaria prevalence in Nias District, North Sumatra Province, Indonesia.
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ABSTRACT: The Nias district of the North Sumatra Province of Indonesia has long been known to be endemic for malaria. Following the economic crisis at the end of 1998 and the subsequent tsunami and earthquake, in December 2004 and March 2005, respectively, the malaria control programme in the area deteriorated. The present study aims to provide baseline data for the establishment of a suitable malaria control programme in the area and to analyse the frequency distribution of drug resistance alleles associated with resistance to chloroquine and sulphadoxine-pyrimethamine. Malariometric and entomology surveys were performed in three subdistricts. Thin and thick blood smears were stained with Giemsa and examined under binocular light microscopy. Blood blots on filter paper were also prepared for isolation of parasite and host DNA to be used for molecular analysis of band 3 (SAO), pfcrt, pfmdr1, dhfr, and dhps. In addition, haemoglobin measurement was performed in the second and third surveys for the subjects less than 10 years old. Results of the three surveys revealed an average slide positivity rate of 8.13%, with a relatively higher rate in certain foci. Host genetic analysis, to identify the Band 3 deletion associated with Southeast Asian Ovalocytosis (SAO), revealed an overall frequency of 1.0% among the 1,484 samples examined. One hundred six Plasmodium falciparum isolates from three sub-districts were successfully analysed. Alleles of the dhfr and dhps genes associated with resistance to sulphadoxine-pyrimethamine, dhfr C59R and S108N, and dhps A437G and K540E, were present at frequencies of 52.2%, 82.5%, 1.18% and 1.18%, respectively. The pfmdr1 alleles N86Y and N1042D, putatively associated with mefloquine resistance, were present at 31.4% and 2%, respectively. All but one sample carried the pfcrt 76T allele associated with chloroquine resistance. Entomologic surveys identified three potential anopheline vectors in the area, Anopheles barbirostris, Anopheles kochi and Anopheles sundaicus. The cross sectional surveys in three different sub-districts of Nias District clearly demonstrated the presence of relatively stable endemic foci of malaria in Nias District, North Sumatra Province, Indonesia. Molecular analysis of the malaria parasite isolates collected from this area strongly indicates resistance to chloroquine and a growing threat of resistance to sulphadoxine-pyrimethamine. This situation highlights the need to develop sustainable malaria control measures through regular surveillance and proper antimalarial drug deployment.Malaria Journal 02/2007; 6:116. · 3.19 Impact Factor -
Article: Malaria prevalence in Nias District, North Sumatra Province, Indonesia
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ABSTRACT: Abstract Background The Nias district of the North Sumatra Province of Indonesia has long been known to be endemic for malaria. Following the economic crisis at the end of 1998 and the subsequent tsunami and earthquake, in December 2004 and March 2005, respectively, the malaria control programme in the area deteriorated. The present study aims to provide baseline data for the establishment of a suitable malaria control programme in the area and to analyse the frequency distribution of drug resistance alleles associated with resistance to chloroquine and sulphadoxine-pyrimethamine. Methods Malariometric and entomology surveys were performed in three subdistricts. Thin and thick blood smears were stained with Giemsa and examined under binocular light microscopy. Blood blots on filter paper were also prepared for isolation of parasite and host DNA to be used for molecular analysis of band 3 (SAO), pfcrt, pfmdr1, dhfr , and dhps . In addition, haemoglobin measurement was performed in the second and third surveys for the subjects less than 10 years old. Results Results of the three surveys revealed an average slide positivity rate of 8.13%, with a relatively higher rate in certain foci. Host genetic analysis, to identify the Band 3 deletion associated with Southeast Asian Ovalocytosis (SAO), revealed an overall frequency of 1.0% among the 1,484 samples examined. One hundred six Plasmodium falciparum isolates from three sub-districts were successfully analysed. Alleles of the dhfr and dhps genes associated with resistance to sulphadoxine-pyrimethamine, dhfr C59R and S108N, and dhps A437G and K540E, were present at frequencies of 52.2%, 82.5%, 1.18% and 1.18%, respectively. The pfmdr1 alleles N86Y and N1042D, putatively associated with mefloquine resistance, were present at 31.4% and 2%, respectively. All but one sample carried the pfcrt 76T allele associated with chloroquine resistance. Entomologic surveys identified three potential anopheline vectors in the area, Anopheles barbirostris, Anopheles kochi and Anopheles sundaicus . Conclusion The cross sectional surveys in three different sub-districts of Nias District clearly demonstrated the presence of relatively stable endemic foci of malaria in Nias District, North Sumatra Province, Indonesia. Molecular analysis of the malaria parasite isolates collected from this area strongly indicates resistance to chloroquine and a growing threat of resistance to sulphadoxine-pyrimethamine. This situation highlights the need to develop sustainable malaria control measures through regular surveillance and proper antimalarial drug deployment.Malaria Journal. 01/2007; -
Article: Survey of community knowledge, attitudes, and practices during a malaria epidemic in central Java, Indonesia.
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ABSTRACT: We surveyed adults in a randomly selected sample of 1,000 households in 50 villages in nine malarial sub-districts in Purworejo, central Java, Indonesia from May to July 2001. The survey assessed malaria knowledge, attitudes, and practices in communities experiencing epidemic malaria to begin exploring broad strategies for controlling the disease in the region. A pre-tested survey instrument consisting of 93 questions addressed demographic characteristics, socioeconomic factors, knowledge and perceptions of malaria, burden and severity of disease, treatment-seeking behavior, malaria prevention practices, and perceptions of government malaria control efforts. The survey was taken by in-person interview of all subjects. Most (97%) subjects were aware of malaria and more than two-thirds correctly identified mosquitoes as the vector. Forty-one percent of households in both forest/hilly and agricultural/urban areas reported malaria illness in the past year. Thirty-six percent (357 households) owned at least one bed net, 92% of these had been purchased by the owners. However, only 36% of households with bed nets affirmed their use as a means of preventing malaria. Nearly all respondents reported a willingness to accept spraying of residual insecticides for malaria prevention, yet less than 5% were willing to pay a nominal fee (US $3) for this service. Fifty-two percent of respondents reported self-treatment of malaria illness without visiting a health facility. This assessment of knowledge, attitudes, and practices showed a broad awareness of malaria and its consequences among residents of malarial areas in the Menoreh Hills of Central Java.The American journal of tropical medicine and hygiene 12/2006; 75(5):783-9. · 2.59 Impact Factor -
Article: Endemic coastal malaria in the Thousand Islands District, near Jakarta, Indonesia.
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ABSTRACT: To conduct malaria surveillance near Jakarta where only imported malaria has been described over the past two decades and to characterize endemicity and risk to heavily populated peri-urban locations. Standard cross-sectional malariometric surveys and mosquito collections at the Thousand Islands District and developing peri-urban areas of Jakarta. During October 2000 outbreak investigations in the Tidung Island group, the slide positive rate was 47% (38%Plasmodium falciparum, 7%P. vivax, and 2% mixed infections) among 733 persons screened. Very few parasitemic inhabitants were symptomatic (<1%), and native residents were more commonly infected than immigrants (odds ratio 1.72), consistent with endemic autochthonous transmission. Adult and larval mosquito collections detected Anopheles sundaicus. In June 2001, prevalence of parasitemia at Pari Island, where sampling was adequate for comparison, remained high, 32%vs. 43% previously. Among 1377 individuals screened at nearby Tangerang District, a heavily populated mainland suburb dominated by fishponds through which many islanders travel to Jakarta, only 19 malaria infections were identified, all imported from Pari Island. Entomological surveillance in Tangerang identified An. subpictus, An. vagus, and An. barbirostris, all considered minor malaria vectors on Java. Malaria is endemic in the Tidung Island group. Imported malaria occurs in the heavily populated Tangerang District where coastal development is increasing and vector breeding sites and demographic patterns lend increasingly to malaria importation and risk of emergent malaria. Careful attention to the impact of coastal development activities on vector populations and efforts to prevent introduction of An. sundaicus are warranted.Tropical Medicine & International Health 06/2005; 10(5):489-96. · 2.80 Impact Factor
