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All Journal Jurnal Entomologi Indonesia Narra J Makara Journal of Health Research Kesmas: Jurnal Kesehatan Masyarakat Nasional (National Public Health Journal)
Din Syafruddin
Eijkman Institute for Molecular Biology
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Health Professions Immunology & microbiology Medicine & Pharmacology Public Health

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Challenges that Hinder Parturients to Deliver in Health Facilities: A Qualitative Analysis in Two Districts of Indonesia Nasir, Sudirman; Ahmed, Rukhsana; Kurniasari, Miladi; Limato, Ralalicia; Tulloch, Olivia; Syafruddin, Din; Koning, Korrie De
Makara Journal of Health Research Vol. 20, No. 3
Publisher : UI Scholars Hub

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Abstract

Background: There are many challenges women face to be able to give birth in health facilities in many parts of Indonesia. This study explores the roles and observations of close-to-community maternal health providers and other community members on potential barriers faced by women to deliver in health facilities in two districts within The Archipelago. Methods: Employing an explorative qualitative approach, 110 semi-structured interviews and 7 focus group discussions were conducted in 8 villages in Southwest Sumba, in the East Nusa Tenggara province, and in 8 villages in Cianjur, in the West Java province. The participants included village midwives, Posyandu volunteer (village health volunteers), traditional birth attendants (TBAs), mothers, men, village heads and district health officials. Results: The main findings were mostly similar in the two study areas. However, there were some key differences. Preference for TBA care, traditional beliefs, a lack of responsiveness of health providers to local traditions, distance, cost of travel and indirect costs of accompanying family members were all barriers to patients attending health facilities for the birth of their child. TBAs were the preferred health providers in most cases due to their close proximity at the time of childbirth and their adherence to traditional practices during pregnancy and delivery. Conclusions: Improving collaborations between midwives and TBAs, collaboration, and responsiveness to traditional practices within health facilities and effective health promotion campaigns about the benefits of giving birth in health facilities may increase the use of health facilities in both study areas.
Evaluation of an E. coli-expressed spike protein-based in-house ELISA system for assessment of antibody responses after COVID-19 infection and vaccination Nurisyah, Sitti; Iyori, Mitsuhiro; Hasyim, Ammar A.; Amru, Khaeriah; Itani, Kei; Nakamura, Kurumi; Zainal, Kartika H.; Halik, Handayani; Djaharuddin, Irawaty; Bukhari, Agussalim; Asih, Puji BS.; Syafruddin, Din; Yoshida, Shigeto; Idris, Irfan; Yusuf, Yenni
Narra J Vol. 5 No. 1 (2025): April 2025
Publisher : Narra Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52225/narra.v5i1.1250

Abstract

Evaluating long-term immunity after COVID-19 infection and vaccination is critical for managing potential outbreaks. The aim of this study was to develop a cost-effective in-house enzyme-linked immunosorbent assay (ELISA) based on Escherichia coli-expressed SARS-CoV-2 spike protein (E-S1) for antibody detection and to evaluate its performance. The system was validated by comparing the in-house ELISA results with those obtained using a commercial ELISA with HEK293-expressed spike protein (H-S1). Recombinant SARS-CoV-2 spike protein was produced in E. coli, purified, and validated for antigenicity via ELISA. Indirect ELISAs with both E-S1 and H-S1 antigens were performed on 386 serum samples from COVID-19 survivors, vaccinated individuals, and pre-pandemic controls collected at different time points. The E-S1 ELISA showed a statistically significant but weak correlation with H-S1 ELISA across all samples (r=0.205; p=0.0001). Stronger correlations were observed among vaccinated individuals with prior infection on day 90 (r=0.6017; p<0.001) and in naïve vaccine recipients on day 30 (r=0.5361; p=0.0003). Pre-pandemic sera from a rural population in Sumba Island exhibited high background reactivity in E-S1 ELISA, likely due to anti-E. coli antibodies, while urban pre-pandemic sera from Jakarta showed a stronger correlation with H-S1 ELISA. This suggests potential regional or immune background differences influencing assay performance. Although E-S1 retained antigenic properties, its diagnostic utility is limited by non-specific reactivity and reduced sensitivity compared to H-S1. In conclusion, E. coli expression systems may not be ideal for producing spike protein-based ELISA antigens specific to SARS-CoV-2. Alternative expression systems, such as human or baculovirus, could enhance diagnostic accuracy and specificity for COVID-19 antibody detection.
Aminolevulinic Acid Dehydratase Allelic Frequency and Lead Toxicity in Children Under-Five in a Former Used Lead-Acid Battery Area Irawati, Yana; Kusnoputranto, Haryoto; Achmadi, Umar Fahmi; Safrudin, Ahmad; Sitorus, Alfred; Risandi, Rifqi; Wangsamuda, Suradi; Permana, Dendi Hadi; Syahrani, Lepa; Dewayanti, Farahana Kresno; Asih, Puji B S; Syafruddin, Din
Kesmas Vol. 17, No. 1
Publisher : UI Scholars Hub

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Abstract

Polymorphisms in the Aminolevulinic Acid Dehydratase (ALAD) gene responsible for the ALAD1 and ALAD2 alleles have been implicated in susceptibility to lead toxicity. This study aimed to determine the allelic frequency of ALAD2 among children living in Bogor District, Indonesia, and its association with blood lead levels (BLLs) and lead toxicity. A cross-sectional study involving 128 children was conducted during September-October 2019 in the former ULAB area in Cinangka Village. The ALAD polymorphism, BLLs, and hematological parameters were evaluated. Blood samples were taken for dried blood spotting on filter paper, blood film, and BLL measurement. The PCR amplification and sequencing of the genomic DNA revealed the presence of two forms of the ALAD2 allele: 177C and 177T with a frequency of 0.05. Analysis of the correlation between the ALAD2 allele, BLLs, and basophilic stippling revealed that ALAD2 carriers had a five times higher risk of high BLLs, (OR = 5.359, p-value = 0.155) and had a slightly higher risk of exhibiting basophilic stippling (OR = 1.09, p-value = 1.000). Although not statistically significant, these findings suggested that the ALAD genotype may modify BLLs and lead to toxicity. The ALAD2 allele(177T) is firstly reported in any population in the world.
Anopheles species diversity and potential vectors of zoonotic malaria in Central Kalimantan, Indonesia: Diversitas spesies Anopheles dan vektor potensial malaria zoonotik di Kalimantan Tengah, Indonesia Permana, Dendi Hadi; Asih, Puji Budi Setia; Suryandari, Dwi Anita; Murhandarwati, Elsa Herdiana; Rozi, Ismail Ekoprayitno; Syahrani, Lepa; Kartapradja, Hannie Dewi Hadyani; Hidayah, Najdah; Bahrani; Irdayanti; Juliawaty, Rita; Coutrier , Elisabeth Farah Novita; Syafruddin, Din
Jurnal Entomologi Indonesia Vol 22 No 3 (2025): November
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5994/jei.22.3.165

Abstract

Zoonotic malaria is an emerging public health issue in Indonesia, particularly in regions with significant forest cover and frequent interaction between humans and non-human primates. Information regarding the diversity and behaviour of mosquito vectors in these areas is very limited. This study aims to identify the diversity and bionomics of mosquitoes, particularly Anopheles sp., across five ecologically diverse locations in Palangkaraya, Central Kalimantan, to gain an understanding of their potential role in zoonotic malaria transmission. Cross-sectional entomological surveys were conducted during November 2022 (during the rainy season) and October 2024 (at the beginning of the rainy season). Adult mosquitoes were collected using human landing catches (HLC) from 18:00 to 06:00, and larval habitats were surveyed and characterized following the WHO protocol. A total of 1,278 mosquitoes were collected from six genera, with Anopheles letifer Sandosham dominating the Anopheles group (97%), particularly in swampy secondary forests, such as Nyaru Menteng. This species exhibited peak outdoor biting activity shortly after dusk and late at night, posing a greater risk to those outside or in unscreened homes. Larval surveys conducted at 48 sites revealed Anopheles larvae in 27% of habitats, predominantly in swamps (67% positive). Although no significant associations were found with environmental factors, natural and semi-natural water bodies appear key to sustaining vector populations. These findings highlight the ecological flexibility of An. letifer and its potential impact on zoonotic malaria transmission in forest-edge communities. Vector control strategies should include integrated methods, such as larval source management and community-based interventions, particularly in peat swamp regions where interactions between humans and non-human primates are frequent.
Co-Authors Ahmad Safrudin Ahmed, Rukhsana Amru, Khaeriah Armyn Nurdin Asih, Puji B S Asih, Puji BS. Bahrani Bukhari, Agussalim Coutrier , Elisabeth Farah Novita Dewayanti, Farahana Kresno Djaharuddin, Irawaty Dwi Anita Suryandari E. Elsa Herdiana Murhandarwati Halik, Handayani Haryoto Kusnoputranto Hasyim, Ammar A. Hidayah, Najdah Irawati, Yana Irdayanti IRFAN IDRIS Isra Wahid Itani, Kei Iyori, Mitsuhiro Juliawaty, Rita Kartapradja, Hannie Dewi Hadyani Koning, Korrie De Limato, Ralalicia Miladi Kurniasari Motoyoshi Mogi Nakamura, Kurumi Nur N. Noor Nurisyah, Sitti Permana, Dendi Hadi Puji B.S. Asih Puji Budi Setia Asih, Puji Budi Risandi, Rifqi Rozi, Ismail Ekoprayitno Septelia I. Wanandi Sitorus, Alfred Sudirman Nasir Syahrani, Lepa Toshihiko Sunahara Tulloch, Olivia Umar Fahmi Achmadi Wahyuning Ramelan Wangsamuda, Suradi Yohanna Sorontou Yoshida, Shigeto Yusuf Yenni Zainal, Kartika H.