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Fulltext Diversity and host associations of Myrsidea chewing lice (Phthiraptera: Menoponidae) in the tropical rainforest of Malaysian Borneo

Madrid RS, Sychra O, Benedick S, Edwards DP, Efeykin BD, Fandrem M, et al.

Int J Parasitol Parasites Wildl, 2020 Dec;13:231-247.
PMID: 33294362 DOI: 10.1016/j.ijppaw.2020.10.011

The tropical rainforests of Sundaland are a global biodiversity hotspot increasingly threatened by human activities. While parasitic insects are an important component of the ecosystem, their diversity and parasite-host relations are poorly understood in the tropics. We investigated parasites of passerine birds, the chewing lice of the speciose genus MyrsideaWaterston, 1915 (Phthiraptera: Menoponidae) in a natural rainforest community of Malaysian Borneo. Based on morphology, we registered 10 species of lice from 14 bird species of six different host families. This indicated a high degree of host specificity and that the complexity of the system could be underestimated with the potential for cryptic lineages/species to be present. We tested the species boundaries by combining morphological, genetic and host speciation diversity. The phylogenetic relationships of lice were investigated by analyzing the partial mitochondrial cytochrome oxidase I (COI) and the nuclear elongation factor alpha (EF-1α) genes sequences of the species. This revealed a monophyletic group of Myrsidea lineages from seven hosts of the avian family Pycnonotidae, one host of Timaliidae and one host of Pellorneidae. However, species delimitation methods supported the species boundaries hypothesized by morphological studies and confirmed that four species of Myrsidea are not single host specific. Cophylogenetic analysis by both distance-based test ParaFit and event-based method Jane confirmed overall congruence between the phylogenies of Myrsidea and their hosts. In total we recorded three cospeciation events for 14 host-parasite associations. However only one host-parasite link (M. carmenae and their hosts Terpsiphone affinis and Hypothymis azurea) was significant after the multiple testing correction in ParaFit. Four new species are described: Myrsidea carmenaesp.n. ex Hypothymis azurea and Terpsiphone affinis, Myrsidea franciscaesp.n. ex Rhipidura javanica, Myrsidea ramonisp.n. ex Copsychus malabaricus stricklandii, and Myrsidea victoriaesp.n. ex. Turdinus sepiarius.

Matched MeSH terms: Borneo
A new genus and a new species of Schizomyiina (Diptera: Cecidomyiidae: Asphondyliini) inducing petiole galls on Macaranga bancana (Miq.) in Borneo, Malaysia

Elsayed AK, Shimizu-Kaya U, Itioka T, Meleng P, Yukawa J, Tokuda M

Zootaxa, 2018 Sep 17;4482(1):188-196.
PMID: 30313329 DOI: 10.11646/zootaxa.4482.1.10

We describe a gall midge Macarangamyia itiokai Elsayed Tokuda gen. n., sp. n. belonging to the subtribe Schizomyiina (Diptera: Cecidomyiidae: Asphondyliini) inducing petiole galls on Macaranga bancana (Miq.) in Lambir Hills National Park, Borneo, Malaysia. The new genus is distinguishable from all known genera of Schizomyiina by the unique dorsally-placed aedeagus slit, the short, membranous, protrusible ovipositor, with scattered strong setae ventrally and dorsally, and the presence of spiracles on all larval thoracic segments. It is compared and separated from its closely related Oriental genera of Schizomyiina.

Matched MeSH terms: Borneo
Fulltext Reaching the last frontier: video conference clinic in Belaga health clinic using the tele-primary care®system

Ringga A, Ngian HU, Chin ZH, Toh TH

Int J Public Health Res, 2011;1(2):1-3.
MyJurnal

Belaga District, in the heart of Borneo, is probably the most remote district in Sarawak. Although Belaga town is now accessible by land (50% are timber camp unsealed road) from Bintulu, the journey takes 5 hours and transport cost is high. Accessibility to Belaga by river is also subject to weather conditions and the town often gets cut off during the dry season and also during the wet season. All these pose immense challenges to the delivery of health care services to the people of Belaga and greatly reduce their accessibility to even basic health services. Access to specialist services is even more challenging as it is only available in Sibu and Bintulu; and visiting clinics in Belaga are infrequent due to the shortage of specialists and difficult transport. (Copied from article).

Matched MeSH terms: Borneo
Antibiotic Resistance of Diverse Bacteria from Aquaculture in Borneo

Kathleen MM, Samuel L, Felecia C, Reagan EL, Kasing A, Lesley M, et al.

Int J Microbiol, 2016;2016:2164761.
PMID: 27746817

The administration of antimicrobials in aquaculture provides a selective pressure creating a reservoir of multiple resistant bacteria in the cultured fish and shrimps as well as the aquaculture environment. The objective of this study was to determine the extent of antibiotic resistance in aquaculture products and aquaculture's surrounding environment in Sarawak, Malaysian Borneo. Ninety-four identified bacterial isolates constituted of 17 genera were isolated from sediment, water, and cultured organisms (fish and shrimp) in selected aquaculture farms. These isolates were tested for their antibiotic resistance against 22 antibiotics from several groups using the disk diffusion method. The results show that the highest resistance was observed towards streptomycin (85%, n = 20), while the lowest resistance was towards gentamicin (1.1%, n = 90). The multiple antibiotic resistant (MAR) index of the isolates tested ranged between 0 and 0.63. It was suggested that isolates with MAR index > 0.2 were recovered from sources with high risk of antibiotic resistant contamination. This study revealed low level of antibiotic resistance in the aquaculture bacterial isolates except for streptomycin and ampicillin (>50% resistance, n = 94) which have been used in the aquaculture industry for several decades. Antibiotic resistant patterns should be continuously monitored to predict the emergence and widespread of MAR. Effective action is needed to keep the new resistance from further developing and spreading.

Matched MeSH terms: Borneo
Fulltext Pollination mutualism between Alocasia macrorrhizos (Araceae) and two taxonomically undescribed Colocasiomyia species (Diptera: Drosophilidae) in Sabah, Borneo

Takano KT, Repin R, Mohamed MB, Toda MJ

Plant Biol (Stuttg), 2012 Jul;14(4):555-64.
PMID: 22289145 DOI: 10.1111/j.1438-8677.2011.00541.x

Two taxonomically undescribed Colocasiomyia species were discovered from inflorescences of Alocasia macrorrhizos in Kota Kinabalu City, Sabah, Borneo, Malaysia. The aims of this study were to investigate the reproductive ecology of the flies and the plant, ascertain the importance of the flies as pollinators and examine the intimate association between flowering events and life history of the flies. We conducted sampling, observations and field pollination experiments. The flies were attracted by the odour of female-phase inflorescences in the early morning on the first day of anthesis. They fed, mated and oviposited in the inflorescences for 1 day. On the second day, the flies, covered with pollen grains, left the male-phase inflorescences for the next female-phase inflorescences. The immature forms of both fly species hatched, developed and pupated within the infructescences without damaging the fruits, and developed adults emerged when the mature infructescences dehisced. The flowering events and fly behaviours were well synchronized. In field pollination experiments, inflorescences bagged with a fine mesh (insect exclusion) produced almost no fruits, whereas those bagged with a coarse mesh (bee exclusion) produced as many fruits as the open-pollinated controls. These results indicate that these flies are the most efficient and specialised pollinators for their host, A. macrorrhizos. These flies, in return, depend on A. macrorrhizos for food and habitat through most of their life cycle. This study provides a deeper insight into the less recognised, highly intimate pollination mutualism between Araceae plants and Colocasiomyia flies.

Matched MeSH terms: Borneo
Fulltext Correlation of mean cycle threshold value of GeneXpert MTB/RIF and time to detection in Mycobacterium growth indicator tubes for Mycobacterium tuberculosis isolates of Kota Kinabalu, Sabah

Nor Fazirah Jamal, Zaw Lin, Zainal Arifin Mustafa, Ahmad Faris Abdullah, Naing Oo Tha, Nor Amalina Emran, et al.

Malaysian Journal of Medicine and Health Sciences, 2019;15(106):38-38.
MyJurnal

Introduction: Tuberculosis (TB) is the ninth leading cause of mortality in the world while it is the most prevalent infection which is ranked abolve HIV/AIDS. In Malaysia, tuberculosis is still a public health problem. Sabah State on Malaysian Borneo had 20-30% of total TB cases of the country. In Sabah, case notification rate of almost 200 per 100,000 population was still present in the last 10 years. Hotspots are defined as TB notification rate more than 100/100.000 in a district or TB notification rate more than 100/100,000 in the squatters’ area. In this study, cycle threshold (ct) values in GeneXpertMTB/RIF (Xpert) were tried to be correlated with growth in Mycobacterim growth indicator tubes (MGIT) by measurement of time to detection (TTD). Methods: Sputum samples from six hotspots of Kota Kinabalu were studied by Xpert as well as MGIT culture after processing of sputum samples. The correlation between Mean ct value of Xpert and TTD in MGIT was analysed by using IBM SPSS Statistic 25 and the statistical test used was Pearson Correlation test. Results: The results of Xpert indicated 35 of 204 sputum samples were pos-itive whereas only one sample was rifampicin resistant. The mean ct values were very low, low and medium in all the hotspots with sputum from one hotspot showed medium ct values predominantly. The sputum from remaining hotspots showed mainly very low and low ct values. MGIT results showed no growth in five samples with two very low, two low and one medium mean ct values. Conclusion: The finding indicated that there were correlations be-tween mean ct values of Xpert and TTD in MGIT with a few exceptions.

Matched MeSH terms: Borneo
Three new species of Krogia (Ramalinaceae, lichenised Ascomycota) from the Paleotropics

Kistenich S, Rikkinen JK, Thüs H, Vairappan CS, Wolseley PA, Timdal E

MycoKeys, 2018.
PMID: 30294209 DOI: 10.3897/mycokeys.40.26025

Krogiaborneensis Kistenich & Timdal, K.isidiata Kistenich & Timdal and K.macrophylla Kistenich & Timdal are described as new species, the first from Borneo and the two latter from New Caledonia. The new species are supported by morphology, secondary chemistry and DNA sequence data. Krogiaborneensis and K.isidiata contain sekikaic and homosekikaic acid, both compounds reported here for the first time from the genus. Krogiamacrophylla contains an unknown compound apparently related to boninic acid as the major compound. DNA sequences (mtSSU and nrITS) are provided for the first time for Krogia and a phylogeny of the genus based on 15 accessions of five of the six accepted species is presented. Krogiaantillarum is reported as new to Brazil, Guatemala and Mexico.

Matched MeSH terms: Borneo
Fulltext Human pentastomiasis caused by Armillifer moniliformis in Malaysian Borneo

Latif B, Omar E, Heo CC, Othman N, Tappe D

Am J Trop Med Hyg, 2011 Nov;85(5):878-81.
PMID: 22049042 DOI: 10.4269/ajtmh.2011.11-0404

We report a case of visceral pentastomiasis caused by Armillifer moniliformis in a 70-year-old aboriginal farmer from rural Malaysian Borneo. The patient complained of upper abdominal pain, jaundice, and loss of weight. Radiological investigations and subsequent histopathological examination revealed an adenocarcinoma of the pancreas with an adjacent liver nodule containing a nymph of A. moniliformis. This report constitutes the first documented human pentastomid infection in the whole of Malaysia after nearly 40 years, and it is the third description from Malaysian Borneo. Cases of human and animal pentastomiasis in Malaysia are discussed.

Matched MeSH terms: Borneo
Terrathelphusa secula, a new species of semiterrestrial freshwater crab (Crustacea: Brachyura: Gecarcinucidae) from Sabah, East Malaysia, Borneo

Ng PK, Tan LW

Zootaxa, 2015;4007(3):445-9.
PMID: 26623825 DOI: 10.11646/zootaxa.4007.3.13

A new species of semiterrestrial gecarcinucid freshwater crab, Terrathelphusa secula, is described from Danum Valley in Sabah, East Malaysia, eastern Borneo. In the form of its carapace, third maxilliped, and male second gonopod, it most closely resembles T. ovis Ng, 1997, and T. telur Ng, 1997, from eastern Sarawak and Brunei, respectively. It differs markedly from these and other congeners in its proportionately much wider carapace, and a male first gonopod that is strongly curved and sickle-shaped.

Matched MeSH terms: Borneo
Prevalence of haemosporidia in Asian Glossy Starling with discovery of misbinding of Haemoproteus-specific primer to Plasmodium genera in Sarawak, Malaysian Borneo

Noni V, Tan CS

BMC Vet Res, 2023 Apr 20;19(1):66.
PMID: 37081458 DOI: 10.1186/s12917-023-03619-y

BACKGROUND: Plasmodium, Haemoproteus and Leucocytozoon are three mainly studied blood parasites known to cause malarial and pseudomalarial infections in avian worldwide. Although Sarawak is a biodiversity hotspot, molecular data on blood parasite diversity in birds are absent. The objective of the study is to determine the prevalence of blood parasite in Asian Glossy Starlings (AGS), an urban bird with high population density in Sarawak and to elucidate the phylogenetic relationship with other blood parasite.
METHODS: Twenty-nine carcasses of juvenile AGS that were succumbed to death due to window collision were collected around the vicinity of Universiti Malaysia Sarawak. Nested-multiplex and nested PCR targeting the Cytochrome B gene were used to detect Plasmodium and Haemoproteus, and Leucocytozoon respectively. Two primer sets were used for Haemoproteus detection to increase detection sensitivity, with one being a genus-specific primer.
RESULTS: Fourteen samples (prevalence rate: 48.28%) were found positive for avian Plasmodium. Phylogenetic analysis divided our sequences into five lineages, pFANTAIL01, pCOLL4, pACCBAD01, pALPSIS01 and pALPSIS02, with two lineages being novel. No Haemoproteus and Leucocytozoon was found in this study. However, Haemoproteus-specific primer used amplified our Plasmodium samples, making the primer non-specific to Haemoproteus only.
CONCLUSION: This is the first blood parasite detection study on AGS using carcasses and blood clot as sample source in Sarawak. Due to the scarcity of longer sequences from regions with high genetic plasticity, usage of genus-specific primers should be validated with sequencing to ensure correct prevalence interpretation.

Matched MeSH terms: Borneo
Fulltext Detection of novel coronaviruses from dusky fruit bat (Penthetor lucasi) in Sarawak, Malaysian Borneo

Habeebur-Rahman SP, Noni V, Khan FAA, Tan CS

Vet Med Sci, 2023 Nov;9(6):2634-2641.
PMID: 37658663 DOI: 10.1002/vms3.1251

BACKGROUND: Sarawak has one of the highest diversity of fruit bats species (family Pteropodidae) in Malaysia, with 19 species described. Most coronavirus (CoV) studies have mainly focused on insectivorous bats, resulting in a lack of information on CoVs present in frugivorous bats. In addition, bat CoV surveillance activities are lacking in Malaysia.
OBJECTIVES: Our study focuses on determining the presence of bat CoVs in dusky fruit bat (Penthetor lucasi).
METHODS: Guano samples belonging to P. lucasi were collected from Wind Cave Nature Reserve. The samples were screened for the presence of CoVs using validated hemi-nested consensus RNA-dependent RNA polymerase consensus primers.
RESULTS: The bat CoV positivity rate was 38.5% (n = 15/39), with the viruses belonging to two subgenera: Alphacoronavirus (α-CoV) and Betacoronavirus (β-CoV). Phylogenetic analysis revealed that CoVs from 14 samples of P. lucasi belong to the genus α-CoV and may represent previously described genetic lineages in insectivorous bats in Wind Cave. However, only one sample of P. lucasi was detected with β-CoV which is closely related to subgenus Nobecovirus, which is commonly seen in frugivorous bats.
CONCLUSIONS: This study provides the first available data on CoVs circulating in P. lucasi.

Matched MeSH terms: Borneo
Fulltext Risk factors for diabetic retinopathy in diabetic screened using fundus photography at a primary health care setting in East Malaysia

Mallika PS, Lee PY, Cheah WL, Wong JS, Syed Alwi SAR, Nor Hayati H, et al.

Malays Fam Physician, 2011;6(2):60-65.
MyJurnal

Introduction: This study reports on the prevalence of diabetic retinopathy (DR) and risk factors among diabetic patients, who underwent fundus photography screening in a primary care setting of Borneo Islands, East Malaysia. We aimed to explore the preliminary data to help in the planning of more effective preventive strategies of DR at the primary health care setting.
Materials and Methods: A cross-sectional study on 738 known diabetic patients aged 19-82 years was conducted in 2004. Eye examination consists of visual acuity testing followed by fundus photography for DR assessment. The fundus pictures were reviewed by a family physician and an ophthalmologist. Fundus photographs were graded as having no DR, NPDR, PDR and maculopathy. The data of other parameters was retrieved from patient’s record. Bi-variate and multivariate analysis was used to elucidate the factors associated with DR.
Results: Any DR was detected in 23.7% (95% CI=21 to 27%) of the patients and 3.2% had proliferative DR. The risk factors associated with any DR was duration of DM (OR =2.5, CI=1.6 to 3.9 for duration of five to 10 years when compared to <5 years) and lower BMI (OR=1.8, CI=1.1 to 3.0). Moderate visual loss was associated with DR (OR=2.1, CI=1.2 to 3.7).
Conclusions: This study confirms associations of DR with diabetic duration, body mass index and visual loss. Our data provide preliminary findings to help to improve the screening and preventive strategies of DR at the primary health care setting.
Keywords: Diabetic retinopathy, epidemiology, screening, primary health care, Malaysia
Study site: Klinik Kesihatan Jalan Masjid, Kuching, Sarawak, Malaysia

Matched MeSH terms: Borneo
Fulltext The complete mitochondrial genome of the cavity-nesting honeybee, Apis cerana (Insecta: Hymenoptera: Apidae) from Borneo

Okuyama H, Tingek S, Takahashi JI

Mitochondrial DNA B Resour, 2017 Jul 31;2(2):475-476.
PMID: 33473869 DOI: 10.1080/23802359.2017.1361344

The complete mitochondrial genome of the cavity-nesting honeybee Apis cerana from Sabah on Borneo Island was analyzed using next-generation sequencing. The mitochondrial genome of A. cerana was a circular molecule of 15,884 bp and was similar to that of the other cavity-nesting honeybee species. The average AT content in the A. cerana mitochondrial genome was 84.4%. It was predicted to contain 13 protein-coding, 22 tRNA, and two rRNA genes, along with one A + T-rich control region.

Matched MeSH terms: Borneo
Fulltext Detection of malaria parasites in Sabah by nested polymerase chain reaction: a focus of naturally acquired Plasmodium knowlesi infections

Anderios F, Zulaikah Mohamed, Ratnam S, Mohd Yusof Ibrahim, Tajul Ariffin Mohd Awang

Sains Malaysiana, 2008;37(2).

The emergence of primate malaria known as Plasmodium knowlesi in humans, which is always misdiagnosed by microscopy as P. malariae, has contribute to the needs of nucleic acid based technology to be applied in detection and differentiation of malaria parasites. The target DNA sequence of the 18SrRNA gene was amplified by a nested PCR assay for detection and identification of Plasmodium species in 31 Giemsa-stained blood smears examined as P. malariae. The assay demonstrated three samples identified as positive to genus-specific primers but negative to all species-specific primers. Three cases of misdiagnosed species were detected. The samples were diagnosed as P. malariae microscopically, but detected as P. falciparum by PCR assay. Twenty five out of 31 samples were detected as P. knowlesi. None of the samples diagnosed microscopically as P. malariae were identified as P. malariae with the nested PCR assay. Over 80.6% of all malaria cases in this study showed naturally acquired P. knowlesi infections.

Matched MeSH terms: Borneo
TRANSMISSION BY SNAILS OF THE SPECIES OF PHYTOPHTHORA WHICH CAUSES FOOT ROT OF PIPER NIGRUM L. IN SARAWAK

TURNER GJ

Nature, 1964 Jun 13;202:1133.
PMID: 14207224
Matched MeSH terms: Borneo
Haemoglobin variants in Sarawak and North Borneo

VELLA F, TAVARIA D

Nature, 1961 May 20;190:729-30.
PMID: 13780662
Matched MeSH terms: Borneo
POPULATION GENETICS OF LONGTAIL TUNA (Thunnus tonggol) (BLEEKER, 1851) FROM EAST MALAYSIA BASED ON MITOCHONDRIAL DNA D-LOOP MARKER

NURUL AZLIANA MOHD YASIN, NOORHANI SYAHIDA KASIM, TUN NURUL AIMI MAT JAAFAR, RUMEAIDA MAT PIAH, WAHIDAH MOHD ARSHAAD, SITI AZIZAH MOHD NOR, et al.

UMT Journal of Undergraduate Research, 2020;2(2):49-56.
MyJurnal

Present study investigates the genetic diversity and genetic distribution of the longtail tuna Thunnus tonggol collected from east Malaysia (Borneo states of Sabah and Sarawak) based on mitochondrial DNA D-loop sequence analysis. 58 fish samples were obtained, specifically from Kota Kinabalu, KK (n = 22), Miri, MR (n=20) and Bintulu, BT (n = 17). DNA template was isolated using the salt extraction method. Final length of 404 base pair (bp) D-loop sequences revealed 52 haplotypes that comprise of 77 variable sites (38 of parsimony informative and 39 singleton). A total of 20 haplotypes were found in KK, 19 haplotypes in MR and 16 haplotypes in BT. Molecular diversity indices revealed high haplotype diversity and low nucleotide diversity in all populations; KK (h = 0.9913 ± 0.0165, π = 0.00239 ± 0.0127), MR (h = 0.9942 ± 0.0193, π = 0.0226 ± 0.0121) and BT (h = 0.9926 ± 0.0230, π = 0.0196 ± 0.0171). Population comparison pairwise FST show that KK and BT were significantly genetically differentiated. The result from this study will be beneficial for fisheries management and also to provide information on the population genetics of T. tonggol in East Malaysian waters.

Matched MeSH terms: Borneo
Fulltext Population structure and demographic history of a tropical lowland rainforest tree species Shorea parvifolia (Dipterocarpaceae) from Southeastern Asia

Iwanaga H, Teshima KM, Khatab IA, Inomata N, Finkeldey R, Siregar IZ, et al.

Ecol Evol, 2012 Jul;2(7):1663-75.
PMID: 22957170 DOI: 10.1002/ece3.284

Distribution of tropical rainforests in Southeastern Asia has changed over geo-logical time scale, due to movement of tectonic plates and/or global climatic changes. Shorea parvifolia is one of the most common tropical lowland rainforest tree species in Southeastern Asia. To infer population structure and demographic history of S. parvifolia, as indicators of temporal changes in the distribution and extent of tropical rainforest in this region, we studied levels and patterns of nucleotide polymorphism in the following five nuclear gene regions: GapC, GBSSI, PgiC, SBE2, and SODH. Seven populations from peninsular Malaysia, Sumatra, and eastern Borneo were included in the analyses. STRUCTURE analysis revealed that the investigated populations are divided into two groups: Sumatra-Malay and Borneo. Furthermore, each group contained one admixed population. Under isolation with migration model, divergence of the two groups was estimated to occur between late Pliocene (2.6 MYA) and middle Pleistocene (0.7 MYA). The log-likelihood ratio tests of several demographic models strongly supported model with population expansion and low level of migration after divergence of the Sumatra-Malay and Borneo groups. The inferred demographic history of S. parvifolia suggested the presence of a scarcely forested land bridge on the Sunda Shelf during glacial periods in the Pleistocene and predominance of tropical lowland rainforest at least in Sumatra and eastern Borneo.

Matched MeSH terms: Borneo
Fulltext Occupational burnout in a sample of geriatric social care professionals in Malaysia

Rathakrishnan RB, Risalshah L, Swami V

Jurnal Psikologi Malaysia, 2008;22:83-94.

The present study was conducted in three old persons' homes located in Kinarut, Sandakan and Tawau, in the state of Sabah (East Malaysia). A total of 59 participants (28 women, 31 men) took part in the study, comprising support staff (administration and nursing) and direct staff (attendants). Participants were instructed to complete a self-reported questionnaire anonymously. The questionnaire consisted of questions on socio-demographic variables, a Bahasa Malaysia (Malay) version of the Maslach Burnout Inventory (MBI), and scales of job clarity and workload.

Matched MeSH terms: Borneo
Genetic identification and structure of Clarias batrachus (Linnaeus, 1758) from Southeast Asia using a mitochondrial DNA marker

Lee P, Sulaiman Z

Zootaxa, 2015;3962(1):182-90.
PMID: 26249385 DOI: 10.11646/zootaxa.3962.1.11

A phylogenetic tree and median-joining network based on cytochrome b sequence data revealed clades consistent with morphological differences and geographical distribution of Clarias batrachus (Linnaeus, 1758) in Southeast Asia. AMOVA analysis for variation was significant among populations (P<0.05) and was in agreement with morphological differences. Pairwise differences were significant between Java and Brunei/Borneo, Brunei/Borneo and west Malaysia, and Java and west Malaysia samples (P < 0.05). Closest relationships were found between samples from Brunei/Borneo and Java, and between west Malaysia and Laos-Sumatra. Nine haplotypes were unique to geographical regions. The Java species had high haplotype (1.000 ± 0.126) but low nucleotide (0.017) diversities, suggesting a population bottleneck followed by expansion. However, SSD and Hri (P=0.5) did not support demographic expansion. Instead, purifying selection where mutations occur and accumulate at silent sites is a more acceptable explanation.

Matched MeSH terms: Borneo

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