Tropical Medicine and Health
Online ISSN : 1349-4147
Print ISSN : 1348-8945
ISSN-L : 1348-8945
43 巻 , 2 号
選択された号の論文の14件中1~14を表示しています
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Short Communications
  • Rumi Sato, Nobuyuki Hamada, Takahito Kashiwagi, Yoshihiro Imamura, Koy ...
    原稿種別: Short Communications
    2015 年 43 巻 2 号 p. 85-88
    発行日: 2015年
    公開日: 2015/04/28
    [早期公開] 公開日: 2015/02/04
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    An adult Japanese man who had just returned from Thailand developed dengue hemorrhagic fever (DHF). A primary infection of dengue virus (DENV) was confirmed, specifically DENV serotype 2 (DENV-2), on the basis of the detection of the virus genome, a significant increase in the neutralizing antibody and the isolation of DENV-2. DHF is often observed following a secondary infection from another serotype of dengue virus, particularly in children, but this case was a primary infection of DENV. Japan is a non-endemic country for dengue disease. In fact, only Japanese encephalitis (JE) is known to be a member of the endemic flavivirus family. In this study, IgG antibody against Japanese encephalitis virus (JEV) was detected. JEV belongs to the family of dengue virus and prevails in Japan, particularly Kyushu. Among many risk factors for the occurrence of DHF, a plausible candidate could be a cross-reactive antibody-dependent enhancement (ADE) mechanism caused by JEV antibody. This indicates that most Japanese travelers who living in dengue non-endemic areas, particularly Kyushu, should be aware of the occurrence of DHF.
Letters to the editor
Short Communications
  • Hiang Ping Chan, Hwee Seng Yip
    原稿種別: Short Communications
    2015 年 43 巻 2 号 p. 93-94
    発行日: 2015年
    公開日: 2015/05/12
    [早期公開] 公開日: 2015/02/24
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    Melioidosis has protean manifestations and often mimics other disease processes. We present a case of a gentleman presenting with chronic cough whose initial radiographic findings of a cavitatory lung lesion and mediastinal lymphadenopathy were suggestive of tuberculosis. This case highlights the important role that bronchoscopy and endobronchial ultrasound can play in the diagnosis of melioidosis in patients presenting with mediastinal lymphadenopathy whose initial microbiological findings from sputum are negative for tuberculosis.
  • Daisuke Nonaka, Tiengkham Pongvongsa, Futoshi Nishimoto, Phetsomphon N ...
    原稿種別: Short Communications
    2015 年 43 巻 2 号 p. 95-100
    発行日: 2015年
    公開日: 2015/05/12
    [早期公開] 公開日: 2015/02/24
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    In Lao PDR, the National Malaria Control Program (NMCP) evaluates bednet coverage, often at the village level, using a coverage target of one net per 2.5 (or fewer) persons in a given population. However, in villages that meet the target, not all households necessarily meet the target or utilize all available bednets. This study explored households that fell short of the target and household utilization of bednets in villages that met the target of bednet coverage set by the NMCP. The person per net ratio (PPNR), which is defined as the population divided by the number of available bednets in a household/village, was used to determine whether a household/village met the NMCP target. Using a household survey, we collected and analyzed the data of 635 households in 17 villages in Xepon district in 2012. Households that fell short of the target (households with a PPNR of > 2.5 or no bednet) existed in every village. The proportion of these households differed greatly among the villages, ranging from 3.4–50%, with some households falling far short. Of the 635 households, 275 (43.5%) had at least one bednet that was not being used on the night preceding the survey and 131 (20.6%) had at least two. In conclusion, in villages that met the NMCP target, a considerable number of households fell short of the target, and the available bednets were not fully utilized in many of the surveyed households.
  • Tri Wibawa, Nastiti Wijayanti, Eggi Arguni, Ida Safitri Laksono
    原稿種別: Short Communications
    2015 年 43 巻 2 号 p. 101-105
    発行日: 2015年
    公開日: 2015/06/30
    [早期公開] 公開日: 2015/03/14
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    Dengue virus (DENV) infection is a significant burden in Indonesia and other tropical countries. DENV infection has a wide spectrum of clinical manifestations, i.e. asymptomatic, dengue fever, dengue hemorrhagic fever and dengue shock syndrome. The variety of clinical manifestations may be due to the diversity of genetic constitution of the host. The C-type lectin DC-SIGN (CD209) has been identified as the major dengue receptor on human dendritic cells. There are at least five polymorphisms in exon 5 and 6 of the DC-SIGN encoded gene which have been identified and recorded in dbSNP. The aim of this work is to measure the frequency of these polymorphisms among asymptomatic and hospitalized DENV-infected patients. We enrolled 23 hospitalized and 73 asymptomatic DENV-infected patients. Among the subjects, we performed PCR amplification and DNA direct seqencing for 23 hospitalized DENV-infected patients and 24 asymptomatic DENV-infected patients. The result showed that there were no polymorphic nucleotides in the CD209 encoded gene among the patients.
  • Yukiko Higa, Ana Paula Abílio, Kyoko Futami, Manuel Alberto Félix Láza ...
    原稿種別: Short Communications
    2015 年 43 巻 2 号 p. 107-109
    発行日: 2015年
    公開日: 2015/06/04
    [早期公開] 公開日: 2015/01/19
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    In early 2014, dengue cases were reported from northern Mozambique, 30 years after the last outbreak. We identified potential dengue vector species in three northern towns, Pemba, Nampula and Nacala, and one southern town, Maputo, during the outbreak in April 2014. A major dengue vector species, Aedes (Stegomyia) aegypti, was found in all these towns. The dominant vector subspecies in the northern towns was Aedes aegypti aegypti, while Ae. aegypti formosus was dominant in Maputo. Considering the high proportion of Ae. aegypti aegypti and its high vector competence, the findings from this study suggest that Ae. aegypti aegypti was responsible for the outbreak in northern Mozambique.
Original Papers
  • Kieu Anh Thi Nguyen, Thu Tuyet Nguyen, Dong Vinh Nguyen, Giang Chau Ng ...
    原稿種別: Original Papers
    2015 年 43 巻 2 号 p. 111-116
    発行日: 2015年
    公開日: 2015/06/04
    [早期公開] 公開日: 2015/03/14
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    Rapid and easy determination of protective neutralization antibody (NAb) against rabies in the field is very important for an early and effective response to rabies in both animal and human health sectors. The rapid neutralizing antibody detection test (RAPINA), first developed in 2009 and then improved in 2012, is a quick test allowing detection of 0.5 IU/ml antibodies in human and animal sera or plasma. This study aimed to assess the RAPINA test by comparison with rapid focus fluorescence inhibition test (RFFIT), using 214 sera of vaccinated and unvaccinated professional dog butchers, laboratory workers and rabies patients in Vietnam. The sensitivity, specificity, false negative rate, false positive rate and concordance of the RAPINA test as compared to RFFIT were 100%, 98.34%, 0%, 1.66% and 98.6%, respectively. The positive predictive value and negative predictive value were 91.7% and 100%, respectively when RAPINA test was used. With its remarkable sensitivity, specificity and easy implementation, RAPINA test can be used for rapid determination of NAb in the field.
  • Nut Koonrungsesomboon, Junjira Laothavorn, Juntra Karbwang
    原稿種別: Original Papers
    2015 年 43 巻 2 号 p. 117-122
    発行日: 2015年
    公開日: 2015/06/30
    [早期公開] 公開日: 2015/01/31
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    The process of informed consent remains a constant challenge in clinical research. The aim of the present study was to evaluate the understanding of researchers and members of Institutional Review Boards (IRBs) regarding the essential elements of an Informed Consent Form (ICF) as required by internationally recognized regulations. Using eight case studies to illustrate basic ethical elements, the study involved 107 participants, mainly from the Asia Pacific and African regions. The results showed that most of the participants had general knowledge regarding the essential elements required in an ICF. However, the issues of confidentiality of data and payment for study participation proved to be problematic for some participants, accounting for 35% and 28% of all incorrect answers respectively. This suggests that participants’ understanding of the underlying concepts of the required ICF elements is limited. Ethical training of researchers and IRB members, particularly in the Asia Pacific and African regions, concerning valid informed consent is still needed.
  • Tadashi Yamashita, Sherri Ann Suplido, Cecilia Llave, Maria Teresa R. ...
    原稿種別: Original Papers
    2015 年 43 巻 2 号 p. 123-130
    発行日: 2015年
    公開日: 2015/06/30
    [早期公開] 公開日: 2015/03/14
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    Background: Given the shortage of medical professionals in the Philippines, Barangay Health Workers (BHWs) may play a role in providing postpartum healthcare services. However, as there are no reports regarding BHW activities in postpartum healthcare, we conducted this study to understand postpartum healthcare services and to explore the challenges and motivations of maternal health service providers. Methods: Focus group interview (FGI) of 13 participants was conducted as qualitative research methodology at Muntinlupa City. The results were analyzed according to the interview guide. The proceedings of the FGI were transcribed verbatim, and researchers read and coded the transcripts. The codes were then used to construct categories. Results: Four important activities were highlighted among 11 analysis codes. These activities were “Assessment of postpartum women’s conditions,” “Recommendation to visit a health facility,” “Measurement of blood-pressure and vitamin intake,” and “Providing postpartum health information.” Among five analysis codes, we identified three challenges that BHWs face, which were “No current information regarding postpartum care,” “Some postpartum women do not want to receive healthcare services from BHW,” and “Too many assigned postpartum women.” Among five analysis codes, we identified two reasons for continuing BHW activities, which were “Hospitality to help postpartum women and their family in the community” and “Performance of mission in providing BHW services.” Conclusion: This study is the first to evaluate BHW activities in postpartum healthcare services. Our results indicate that BHWs play a potentially important role in evaluating postpartum women’s physical and mental conditions through home-visiting services. However, several difficulties adversely affected their activities, and these must be addressed to maximize the contributions of BHWs to the postpartum healthcare system.
  • Khin Zay Yar Myint, Daisuke Nonaka, Masamine Jimba, Keiko Nanishi, Kri ...
    原稿種別: Original Papers
    2015 年 43 巻 2 号 p. 131-140
    発行日: 2015年
    公開日: 2015/06/30
    [早期公開] 公開日: 2015/03/25
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    Weight concerns and dieting are prevalent among female adolescents both in Western and Asian countries. They can result in negative psychological and physiological consequences. This study aimed to examine the relative importance of social and personal factors in the decision to diet among female adolescent students in Japan, applying the Theory of Planned Behavior. Data were collected from five junior high schools and three high schools in Naha City, Okinawa Prefecture, in 2010, through self-administered questionnaires. The data of 756 female students were assessed. The independent variables included social factor variables (norms) and personal factor variables (attitude to dieting, perceived behavior control, body esteem, body-figure discrepancy and past dieting). The dependent variables were dieting intention and behavior. Hierarchical multiple regression analyses were performed to examine three models: model 1 (age and obesity index), model 2 (social factor variables with age and obesity index) and model 3 (all variables). Although model 2 failed to explain a substantial proportion of the variance, model 3 explained approximately a half of the variance for intention (R2 = 0.507) and more than one third of the variance for behavior (R2 = 0.376). Past experience of dieting was the best predictor of both dieting intention and behavior. Body esteem was the second best predictor for dieting behavior. In conclusion, personal factors are more likely than social factors to drive the dieting decision. Diet education programs should consider targeting frequent dieters and those with poor body esteem.
Reviews and Opinions
  • Pablo Goldschmidt
    原稿種別: Reviews and Opinions
    2015 年 43 巻 2 号 p. 141-148
    発行日: 2015年
    公開日: 2015/06/30
    [早期公開] 公開日: 2015/03/25
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    Organizations working for the elimination of Chlamydia-triggered blindness (trachoma) follow the WHO SAFE strategy (surgery for trichiasis, antibiotics, face washing and environmental changes) with the aim to achieve a minimum of 80% of children with clean faces in endemic communities, mass treatment covering the whole district with trachoma rates of 10% or more and surveillance plans. Trachoma recurrence that is common after implementing the SAFE strategy 3, 5 or even 7 times evidence that the cognitive processes requiring assimilation and integration of knowledge did not register with parents, caretakers and children. Moreover, repeated awareness campaigns to improve hygiene did not systematically produce irreversible changes of behavior in neglected populations. In view of this evidence, the rational behind mass drug administration as the mainstay of preventable blindness elimination demands a wider scope than simple mathematical models. The reluctance to see disappointing outcomes that leads to repeated interventions may suggest from a sociologic point of view that the strategies are products of those evaluating the activities of those who fund them and vice versa. A similar articulation emerges for reciprocal interactions between researchers and those judging the pertinence and quality of their work. So far, the lack of autocritic elimination strategy approaches may expose inbred circles that did not properly grasp the fact that antibiotics, trichiasis surgery and education limited to improvement of hygiene are inefficient if not associated with long-term basic educational actions in schools.
Short Communications
  • Tetsuro Kobayashi, Kayoko Hayakawa, Momoko Mawatari, Makoto Itoh, Nobu ...
    原稿種別: Short Communications
    2015 年 43 巻 2 号 p. 149-153
    発行日: 2015年
    公開日: 2015/06/30
    [早期公開] 公開日: 2015/03/14
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    We encountered a probable case of loiasis in a returned traveler from Central Africa. A 52-year-old Japanese woman presented to our hospital complaining of discomfort in her eyes and skin. She reported having frequently visited Central Africa over many years and having been extensively exposed to the rainforest climate and ecosystem. Although no microfilariae were found in her blood, there was an elevated level of IgG antibodies against the crude antigens of Brugia pahangi, which have cross-reactivity with Loa loa. She was treated with albendazole for 21 days, after which the antigen-specific IgG level decreased and no relapse occurred.
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