Displaying publications 1 - 20 of 143 in total

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  1. Tan CH, Tan NH, Sim SM, Fung SY, Gnanathasan CA
    Acta Trop, 2012 Jun;122(3):267-75.
    PMID: 22322247 DOI: 10.1016/j.actatropica.2012.01.016
    Envenomation by hump-nosed pit viper (Hypnale hypnale, Hh) in Sri Lanka has caused significant morbidity and mortality, attributed to 35% of total venomous snakebites. In Southwestern India (Kerala), H. hypnale was increasingly identified as a dangerous and common source of envenomation, second to the Russell's viper but ahead of the cobra bites. Unfortunately, there is still no specific antivenom to date. This study aims to investigate the immunological properties of the venom and to assess the feasibility of specific Hh antivenom production as well as the development of a diagnostic assay. Hh venom elicited satisfactory titers of anti-Hh IgG in rabbits after 3rd immunization. The anti-Hh IgG, isolated with caprylic acid precipitation method, was effective in neutralizing the venom lethality (potency=48 LD(50) per ml IgG) as well as its procoagulant, hemorrhagic and necrotic effects, indicating the possibility to produce the specific antivenom using the common immunization regime. Cross-reactivity studies using indirect ELISA showed that anti-Hh IgG cross-reacted extensively with several Asiatic crotalid venoms, particularly that of Calloselasma rhodostoma (73.6%), presumably due to the presence of venom antigens common to both snakes. Levels of immunological cross-reactivity were vastly reduced with double-sandwich ELISA. Further work demonstrated that the assay was able to distinguish and quantify venoms of H. hypnale, Daboia russelii and Echis carinatus sinhaleyus (three common local viperid) used to spike human sera at various concentrations. The assay hence may be a useful investigating tool for diagnosing biting species and studying the time course profile of venom concentrations in blood.
    Matched MeSH terms: Sri Lanka
  2. Konradsen F, van der Hoek W, Amerasinghe FP, Mutero C, Boelee E
    Acta Trop, 2004 Jan;89(2):99-108.
    PMID: 14732233
    Traditionally, engineering and environment-based interventions have contributed to the prevention of malaria in Asia. However, with the introduction of DDT and other potent insecticides, chemical control became the dominating strategy. The renewed interest in environmental-management-based approaches for the control of malaria vectors follows the rapid development of resistance by mosquitoes to the widely used insecticides, the increasing cost of developing new chemicals, logistical constraints involved in the implementation of residual-spraying programs and the environmental concerns linked to the use of persistent organic pollutants. To guide future research and operational agendas focusing on environmental-control interventions, it is necessary to learn from the successes and failures from the time before the introduction of insecticides. The objective of this paper is to describe the experiences gained in Asia with early vector control interventions focusing on cases from the former Indian Punjab, Malaysia and Sri Lanka. The paper deals primarily with the agricultural engineering and land and water management vector control interventions implemented in the period 1900-1950. The selected cases are discussed in the wider context of environment-based approaches for the control of malaria vectors, including current relevance. Clearly, some of the interventions piloted and implemented early in the last century still have relevance today but generally in a very site-specific manner and in combination with other preventive and curative activities. Some of the approaches followed earlier on to support implementation would not be acceptable or feasible today, from a social or environmental point of view.
    Matched MeSH terms: Sri Lanka
  3. Soo ZMP, Khan NA, Siddiqui R
    Acta Trop, 2020 Jan;201:105183.
    PMID: 31542372 DOI: 10.1016/j.actatropica.2019.105183
    Leptospirosis is a zoonotic disease caused by the pathogenic helical spirochetes, Leptospira. Symptoms include sudden-onset fever, severe headaches, muscle pain, nausea and chills. Leptospirosis is endemic in developing countries such as Malaysia, India, Sri Lanka, and Brazil where thousands of cases are reported annually. The disease risk factors include the high population of reservoirs, environmental factors, recreational factors, and occupational factors. To end the endemicity of leptospirosis, these factors need to be tackled. The management of leptospirosis needs to be refined. Early diagnosis remains a challenge due to a lack of clinical suspicion among physicians, its non-specific symptoms and a limited availability of rapid point-of-care diagnostic tests. The purpose of this review is to provide insight into the status of leptospirosis in developing countries focusing on the risk factors and to propose methods for the improved management of the disease.
    Matched MeSH terms: Sri Lanka/epidemiology
  4. Arai YT, Takahashi H, Kameoka Y, Shiino T, Wimalaratne O, Lodmell DL
    Acta Virol., 2001;45(5-6):327-33.
    PMID: 12083333
    Thirty-four suspected rabid brain samples from 2 humans, 24 dogs, 4 cats, 2 mongooses, I jackal and I water buffalo were collected in 1995-1996 in Sri Lanka. Total RNA was extracted directly from brain suspensions and examined using a one-step reverse transcription-polymerase chain reaction (RT-PCR) for the rabies virus nucleoprotein (N) gene. Twenty-eight samples were found positive for the virus N gene by RT-PCR and also for the virus antigens by fluorescent antibody (FA) test. Rabies virus isolates obtained from different animal species in different regions of Sri Lanka were genetically homogenous. Sequences of 203 nucleotides (nt)-long RT-PCR products obtained from 16 of 27 samples were found identical. Sequences of 1350 nt of N genes of 14 RT-PCR products were determined. The Sri Lanka isolates under study formed a specific cluster that included also an earlier isolate from India but did not include the known isolates from China, Thailand, Malaysia, Israel, Iran, Oman, Saudi Arabia, Russia, Nepal, Philippines, Japan and from several other countries. These results suggest that one type of rabies virus is circulating among human, dog, cat, mongoose, jackal and water buffalo living near Colombo City and in other five remote regions in Sri Lanka.
    Matched MeSH terms: Sri Lanka
  5. Farr G, Amatya R
    Adv Contracept, 1994 Jun;10(2):137-49.
    PMID: 7942261
    The clinical performance of the Copper T380A (TCu380A) and the Multiload 250 (MLCu250) intrauterine devices (IUDs) were evaluated for 12 months in a group of women who had one of the two IUDs inserted. Results are from a randomized clinical trial conducted at four collaborating research sites located in three developing countries. The gross cumulative life-table pregnancy rate of the TCu380A IUD was significantly lower than the rate with the MLCu250 IUD at 12 months (0.5 and 1.2, respectively, p < 0.01). No statistically significant differences between the two study IUDs were found with regard to IUD expulsion or IUD removal due to bleeding/pain, personal reasons, medical reasons, or planned pregnancy. TCu380A IUD users were more likely to report experiencing increased dysmenorrhea (p < 0.01) or intermenstrual pelvic pain (p < 0.01) than were MLCu250 IUD users. However, few of these users discontinued use of their assigned IUD because of having experienced menstrual bleeding disturbances or intermenstrual pelvic pain. These data indicate that the TCu380A IUD may be a better option than the MLCu250 IUD for women wishing to practice highly effective long-term birth control without having to resort to hormonal methods.
    Matched MeSH terms: Sri Lanka
  6. Von Keep PA
    Adv Fertil Control, 1967;2:1-5.
    PMID: 12275322
    Matched MeSH terms: Sri Lanka
  7. Perkin GW
    Adv Fertil Control, 1969 Sep;4(3):37-42.
    PMID: 12146214
    Matched MeSH terms: Sri Lanka
  8. Rickson F, Rickson M
    Am J Bot, 1998 Jun;85(6):835.
    PMID: 21684968
    Cashew nut trees are consistently ant-visited throughout the year, with the ants attracted to a large number of extrafloral nectaries on the leaves, inflorescences, flowers, and developing nuts. The commercial production of cashew nut, for example, in India, Brazil, and east Africa, consistently applies pesticides, especially insecticides, in large monoculture plantings. Each year prophylactic spraying begins with the first flush of new leaves, continues through flowering, ending at about mid-nut development. We surveyed for ant diversity in sprayed and unsprayed cashew monocultures of various sizes and ages in Sri Lanka, India, and Malaysia to document the ant-cashew relationship and to explore the potential of ants replacing chemical pesticides in insect control. Using for-profit, commercial-size plantations as examples, we present information that cashew has a strong potential for arthropod-dependent protection from pests and suggest important habitat considerations for encouraging ants within cashew plantings.
    Matched MeSH terms: Sri Lanka
  9. Lau CH, Drinkwater RD, Yusoff K, Tan SG, Hetzel DJ, Barker JS
    Anim. Genet., 1998 Aug;29(4):253-64.
    PMID: 9745663
    Swamp and river buffalo mitochondrial DNA (mtDNA) was sequenced for 303 bp of the cytochrome b gene for 54 animals from 14 populations, and for 158 bp of the D-loop region for 80 animals from 11 populations. Only one cytochrome b haplotype was found in river buffalo. Of the four haplotypes identified in swamp buffalo, one found in all populations is apparently ancestral both to the other swamp haplotypes and to the river haplotype. The phylogenetic relationships among the 33 D-loop haplotypes, with a cluster of 11 found in swamp buffalo only, also support the evolution of domesticated swamp and river buffalo from an ancestral swamp-like animal, most likely represented today by the wild Asian buffalo (Bubalus arnee). The time of divergence of the swamp and river types, estimated from the D-loop data, is 28,000 to 87,000 years ago. We hypothesise that the species originated in mainland south-east Asia, and that it spread north to China and west to the Indian subcontinent, where the rive type evolved and was domesticated. Following domestication in China, the domesticated swamp buffalo spread through two separate routes, through Taiwan and the Philippines to the eastern islands of Borneo and Sulawesi, and south through mainland south-east Asia and then to the western islands of Indonesia.
    Matched MeSH terms: Sri Lanka
  10. Dorny P, Van Aken D
    Ann Trop Med Parasitol, 1992 Feb;86(1):83-5.
    PMID: 1616398
    Matched MeSH terms: Sri Lanka/epidemiology
  11. Ramalingaswami V
    Ann Intern Med, 1973 Feb;78(2):277-83.
    PMID: 4265088
    Matched MeSH terms: Sri Lanka
  12. Ong CN, Phoon WO, Tan TC, Jeyaratnam J, Cho SC, Suma'mur PK, et al.
    Ann Acad Med Singap, 1984 Apr;13(2 Suppl):429-34.
    PMID: 6497348
    This study is based on a survey conducted in Hong Kong, Indonesia, Korea, Malaysia, the Philippines, Singapore, Sri Lanka and Thailand on occupational injuries during the years 1975-1980. The number of work accidents have risen rapidly during this period in all of the 8 countries studied. In the case of Thailand, the total number of work injuries increased four fold from 1975-1978, whereas, in Singapore it has almost doubled in 6 years. The number of permanent disablement nearly trebled in Korea, and the Philippines for the year 1967-1980. The largest percentage of accidents are lost-time injuries in all of the 8 countries. Thailand had a three fold increase in lost-time injuries whilst in Hong Kong the figure doubled. Six out of the 8 countries indicated that the building construction industry had the largest number of fatal accidents, followed by the manufacturing industry.
    Matched MeSH terms: Sri Lanka
  13. Stein Z, Durkin M, Belmont L
    Ann N Y Acad Sci, 1986;477:8-21.
    PMID: 3468840
    In this paper we first present methods and preliminary results of pilot surveys of "serious" mental retardation (IQ less than or equal to 55); the surveys included screening and diagnostic components and were carried out in the less-developed world. Next we discuss two problems raised by these surveys: one is the diagnosis of a case and its clinical dimensions, and the other is the interpretation of prevalence. In the next section we illustrate epidemiological approaches to the analysis of such data, in particular their relevance to prevention. Lastly, we propose that the two-stage survey approach developed in the course of the pilot work can provide a valuable basis for planning and prevention, if certain key conditions can be met.
    Matched MeSH terms: Sri Lanka
  14. Prathapan S, Wijewardena K, Low WY
    Asia Pac J Public Health, 2016 Jan;28(1 Suppl):86S-92S.
    PMID: 26658325 DOI: 10.1177/1010539515620481
    Food marketing is one of the main factors in the increase in childhood obesity. The objective is to compare the strategies used for promotion of food and beverages advertisements on Sri Lankan television for children and adults.
    Matched MeSH terms: Sri Lanka
  15. Byrnes A, Haregu TN, Pasricha N, Singh K, Thirunavukkarasu S, Wickkramasinghe K, et al.
    Asia Pac J Public Health, 2019 Sep;31(6):536-547.
    PMID: 31409121 DOI: 10.1177/1010539519867791
    This article describes the design, outcomes, challenges, and lessons learned from the ASian Collaboration for Excellence in Non-Communicable Disease (ASCEND) program, implemented between 2011 and 2015 in India, Sri Lanka, and Malaysia. The program involved a blended-delivery model, incorporating online and face-to-face training, mentoring, and supervision of trainees' research projects. Evaluation data were collected at baseline, 6, 12, 18, and 24 months. Intended outcomes, lessons, and challenges were summarized using a logic model. During the program period, 48 participants were trained over 2 cohorts in June 2011 and 2012. The trainees published 83 peer-reviewed articles between 2011 and 2015. Additionally, 154 presentations were given by trainees at national and international conferences. Underutilization of the online learning management system was an important challenge. Utilizing a combination of intensive face-to-face and online learning and mentoring of early career researchers in low- and middle-income countries has great potential to enhance the research capacity, performance, and outputs.
    Matched MeSH terms: Sri Lanka
  16. Jayasinghe RD, Jayasooriya PR, Amarasinghe H, Hettiarachchi P, Siriwardena B, Wijerathne U, et al.
    Asian Pac J Cancer Prev, 2021 Apr 01;22(4):1287-1293.
    PMID: 33906324 DOI: 10.31557/APJCP.2021.22.4.1287
    BACKGROUND: Prevalence of smoking in Sri Lanka has shown a gradual reduction whilst the use of smokeless tobacco and areca nut exhibits an increasing trend. At present, only a few well-structured smokeless tobacco (SLT)/areca nut (AN) cessation programs have been conducted in Sri Lanka, which is a gross underachievement as betel chewing-related oral squamous cell carcinoma is the most common cancer in Sri Lankan males. As General Dental Practitioners (GDP) do not contribute significantly to SLT/AN cessation activities at present, capacity building programs on SLT/AN control were carried out. The study evaluated the knowledge, attitude and practices  imparted on SLT/AN control among dental surgeons.

    METHODS: Following a single day capacity building program on smokeless tobacco / areca nut control, two self-administered questionnaires were used to assess the improvement of knowledge and change of attitudes among 663 GDPs.

    RESULTS: Majority had a good knowledge on harmful effects of SLT but not on areca nut. Knowledge of the current legislation on SLT control in Sri Lanka and carcinogenicity of areca nut was not satisfactory. Almost all agreed that proper counseling leads to patient quitting the habit, a formal training is necessary to conduct tobacco control activities and it should be a part of the regular treatment modalities. More than 80% of the participants support strict legislation. Most important factors leading to poor involvement in tobacco cessation activities were lack of expertise and inadequate educational material and not breach of patient privacy and lack of financial incentives. 20.1% dental surgeons had consumed smokeless tobacco / areca nut products in the past and only a few were current users of tobacco and/or areca nut.

    CONCLUSIONS: Well planned workshops are efficient in improving knowledge, practices and attitudes of dental surgeons towards SLT/AN cessation.
    .

    Matched MeSH terms: Sri Lanka
  17. Edirisinghe ST, Weerasekera M, De Silva DK, Devmini MT, Pathmaperuma S, Wijesinghe GK, et al.
    Asian Pac J Cancer Prev, 2023 Jan 01;24(1):267-274.
    PMID: 36708576 DOI: 10.31557/APJCP.2023.24.1.267
    BACKGROUND: The incidence of oral squamous cell carcinoma (OSCC) is very high in South Asia and Vascular endothelial growth factor (VEGF) is one of the key factors essential for cancer growth. The importance of VEGF-A and VEGF Receptor 2(VEGFR-2) in oral cancer pathophysiology is yet to be decided. Vascular Endothelial Growth Factor A (VEGF-A) is the main factor concerned in angiogenesis in tumors, but its role in Oral Squamous Cell Carcinoma (OSCC) is still debatable. Our study aimed to determine the role of VEGF-A and VEGFR-2 in OSCC.

    METHODS: Blood from 30 patients with primary OSCC and 1:1 age-sex-matched controls was subjected to qPCR and ELISA to detect VEGF-A gene expression and serum level. Tumors of the 30 patients were investigated for VEGF Receptor-2 (VEGFR-2) expression and were analyzed using Image J software version 1.52 for DAB percentage (DAB-P) area and optical density (OD).

    RESULTS: VEGF-A relative gene expression among patients was 2.43-fold higher compared to the healthy control group. Well-differentiated had a 1.98-fold increment, while poorly differentiated had a 3.58-fold increment. Serum VEGF-A was significantly elevated among the patients compared to controls (458.7 vs 253.2, p=0.0225). Poorly differentiated had a higher serum VEGF concentration (1262.0±354.7pg/ml) compared with other two. Mean VEGFR-2 DAB-P level in OSCC was 42.41±5.61(p=0.15). Well-differentiated had a DAB-P of 41.20±5.32 while poorly differentiated had DAB-P 46.21±3.78. The mean OD in OSCC was 0.54±0.16. VEGFR-2 OD in well and poorly differentiated OSCC were 0.48±0.12 and 0.68±0.17, respectively.

    CONCLUSIONS: VEGF-A gene expression, serum levels, and tissue VEGFR-2 levels correlated linearly with the stage and grade of the tumor. This study justifies the value of VEGF-A as a potential biomarker in OSCC in early detection of OSCC. More studies are needed to accept the use of VEGF-A.

    Matched MeSH terms: Sri Lanka
  18. Damayanthi HDWT, Moy FM, Abdullah KL, Dharmaratne SD
    Asian Nurs Res (Korean Soc Nurs Sci), 2018 Sep;12(3):231-236.
    PMID: 30193884 DOI: 10.1016/j.anr.2018.08.008
    PURPOSE: Low muscle strength is central to geriatric physical disabilities and mortality. The purpose of the present study was to examine handgrip strength (HGS) and its associated factors among community-dwelling older people in Sri Lanka.

    METHODS: A cross-sectional study was conducted in the Kandy district using multistage sampling. A total of 999 older people were recruited, with a female preponderance. Data were collected using interviewer-administered questionnaires on demographic characteristics, depression, and physical activity. Anthropometric measurements including weight, height, mid-upper arm circumference, calf circumference, and HGS were recorded. Complex sample general linear model was used to examine the association between HGS and its associated factors.

    RESULTS: The mean highest HGS of the study group was 12.56 kg (95% confidence interval: 11.94-13.19). Male older people had a higher HGS (17.02, 95% confidence interval: 15.55-18.49 kg) than females (10.59, 95% confidence interval: 10.12-11.06 kg). For both men and women, older age was associated with lower HGS, while mid-upper arm circumference was associated with better HGS. Diabetes mellitus, vegetarian diet, and alcohol consumption were associated with HGS for women only.

    CONCLUSION: Men had a higher HGS compared with women. Age, mid-upper arm circumference, diabetes mellitus, vegetarian diet, and alcohol consumption were factors associated with HGS among community-dwelling older people in Kandy district, Sri Lanka. HGS can be used as a feasible strategy to improve health status of older people by community health nurses.

    Matched MeSH terms: Sri Lanka
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