Publications by authors named "Yvonne Ai-Lian Lim"

Article Synopsis
  • The study investigates soil-transmitted helminth (STH) infections among Malaysia's indigenous Negritos, finding a high overall prevalence of 63.3% despite past intervention efforts.
  • Trichuris trichiura and Ascaris lumbricoides are the most common infections, with moderate-to-heavy infections significantly linked to the presence of infections in other household members.
  • The results highlight the urgent need for comprehensive anthelmintic treatment for all age groups and recommend local policy changes to target older members of the Orang Asli community to improve health outcomes for future generations.
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  • * A study involving 596 schoolchildren aged 8-12 years revealed a high prevalence of xerophthalmia (48.8%), primarily identified by conjunctival xerosis, and linked to factors like malnutrition and socio-demographic status.
  • * Boys and indigenous Orang Asli children showed a higher risk for xerophthalmia, while overweight/obese children had a lower risk, highlighting the need for targeted interventions to address VAD and its related health issues in these communities.
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  • Skin infections significantly burden underserved communities, particularly the isolated Negrito tribes of Peninsular Malaysia, with a notable study revealing a 35.6% overall prevalence.
  • Major infections found were scabies (11.7%), tinea versicolor (11.3%), and tinea imbricata (7.5%), with higher rates in resettled villages compared to inland ones.
  • The study emphasizes the need for targeted interventions, linking specific infections to environmental factors and lifestyle choices, to improve healthcare access and support for these communities.
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Over the last five decades, widespread industrialisation and urbanisation have resulted in the influx of low-skilled workers, particularly from Southeast and West Asia to Malaysia. The current practice for migrant workers entry for employment requires mandatory medical screening for infectious diseases. However, screening for parasitic infections in Malaysia is woefully inadequate.

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  • * A study in Malaysia examined 134 cancer patients and 17 healthy controls to assess the prevalence of IPIs and how they affect gut microbiota composition, finding a 32.8% prevalence of IPIs among cancer patients.
  • * Results indicated significant differences in gut microbiota diversity between cancer patients and healthy controls, as well as distinct bacterial compositions between parasite-infected and non-infected cancer patients, suggesting that intestinal parasites may disrupt normal gut microbiota balance in this vulnerable group.
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In indigenous populations where soil-transmitted helminths (STH) infections are endemic, STH parasites (i.e., , , hookworms) often co-exist and co-evolve with the gut microbiota of their human hosts.

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Purpose: Vitamin A deficiency (VAD) remains a significant contributor to childhood morbidity and mortality in developing countries; therefore, the implementation of sustainable and cost-effective approaches to control VAD is of utmost pertinence. This study aims to investigate the efficacy of red palm olein (RPO)-enriched biscuit supplementation in improving vitamin A, haematological, iron, and inflammatory status among vitamin A-deficient schoolchildren.

Methods: We conducted a double-blinded, randomised controlled trial involving 651 rural primary schoolchildren (8-12 years) with VAD in Malaysia.

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Humans are in a complex symbiotic relationship with a wide range of microbial organisms, including bacteria, viruses, and fungi. The evolution and composition of the human microbiome can be an indicator of how it may affect human health and susceptibility to diseases. Microbiome alteration, termed as dysbiosis, has been linked to the pathogenesis and progression of hematological cancers.

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Article Synopsis
  • - The study investigated the rates and predictors of oral and gastrointestinal mucositis in patients undergoing hematopoietic stem cell transplant (HSCT), emphasizing the relationship between inflammation markers and mucositis severity.
  • - Over 142 patients were monitored, revealing high prevalence rates of oral (68.3%) and gastrointestinal mucositis (95.8%), with factors like specific treatment regimens and patient characteristics significantly affecting mucositis severity.
  • - Cytokine levels in saliva and plasma were linked to the severity of oral mucositis, providing valuable real-world insights for managing and predicting mucositis in HSCT patients.
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Mucositis is a debilitating complication of hematopoietic stem cell transplantation (HSCT). It is unclear how changes in the composition of microbiota, which are modulated by geographical location and ethnicity, may influence immune regulation leading to the development of mucositis, and the study of both oral and gut microbiota in a single population of autologous HSCT in the Asian region is lacking. The present study aimed to characterize the oral and gut microbiota changes, and the impact on both oral and lower gastrointestinal (GI) mucositis, with associated temporal changes in a population of adult recipients of autologous HSCT.

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Notwithstanding the global efforts made to control intestinal parasitic infections, soil-transmitted helminth (STH) infections are still one of the most prevalent infections globally, especially in developing countries. A double-blinded, randomized controlled trial was conducted on 343 primary schoolchildren (8-12 years old) with vitamin A deficiency (VAD) in rural areas of Malaysia to investigate the effects of red palm olein (RPO)-enriched biscuits on STH reinfection rates and infection intensities. The effects of the RPO-enriched biscuits (experimental group, n = 153) and palm olein (PO)-enriched biscuits (control group, n = 190), were assessed at 3- and 6-month after the administration of complete triple-dose albendazole (one dose of 400 mg for three consecutive days).

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Context: The continuous rise in urbanisation and its associated factors has been reflected in the structure of the human gut ecosystem.

Objective: The main focus of this review is to discuss and summarise the major risk factors associated with urbanisation that affect human gut microbiota thus affecting human health.

Methods: Multiple medical literature databases, namely PubMed, Google, Google Scholar, and Web of Science were used to find relevant materials for urbanisation and its major factors affecting human gut microbiota/microbiome.

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Species of the genus Railliet & Henry, 1910 the most widely distributed avian filariae in Africa and South America. Zoonotic cases in humans were reported in South America. While investigating the filarial fauna of wild animals in Malaysia, we discovered an undescribed filaria from the swollen footpad of the left leg of (Scopoli) in Pahang, Peninsular Malaysia.

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Background: Malaria remains one of the most virulent and deadliest parasitic disease in the world, particularly in Africa and Southeast Asia. Widespread occurrence of artemisinin-resistant Plasmodium falciparum strains from the Greater Mekong Subregion is alarming. This hinders the national economies, as well as being a major drawback in the effective control and elimination of malaria worldwide.

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Article Synopsis
  • Indigenous populations, like certain Malaysian villages, show microbiomes that are diverse and less understood compared to those in industrialized societies, particularly regarding helminth (worm) infections.
  • Villages with higher helminth infection rates exhibited more unmapped genetic data and greater microbial diversity, with differences in microbiome composition related to specific localities and associated infection status.
  • Treatment with albendazole (a deworming drug) caused changes in both infected and uninfected individuals' microbiomes, highlighting the complex interactions between helminths and microbiota, and emphasizing the need for careful interpretation in deworming research.
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In Malaysia, soil-transmitted helminth (STH) infections still persist among indigenous communities. In the past, local studies have focused mostly on epidemiologic aspects of STH infections with a scarcity of information on the efficacy of deworming treatment. The present study consisted of 2 phases: a cross-sectional phase on current epidemiological status and risk factors of STH infections and a longitudinal study over 6 weeks on triple dose albendazole efficacy against STH infections.

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  • This study investigates asymptomatic verocytotoxin-producing E. coli (VTEC) infections in indigenous individuals in Malaysia, highlighting the public health risk posed by human carriers.
  • Analyzed stool samples from 41 individuals, researchers identified 108 strains and confirmed 4 as VTEC, with varying antimicrobial resistance profiles, particularly high resistance to ampicillin.
  • Findings reveal a genetically diverse presence of VTEC among the indigenous population, emphasizing the need for monitoring these infections and addressing antimicrobial resistance.
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Childhood malnutrition is known as a public health concern globally. The present study aims to assess the anthropometry and blood biochemical status of rural primary schoolchildren in Malaysia. A total of 776 children (7-11 years old) from ten rural primary schools from five states were included in this study.

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Article Synopsis
  • * This initiative encourages data-sharing and collaborative analysis to build strong evidence on the effectiveness and safety of treatments for these diseases.
  • * A Research Agenda has been developed to engage researchers and highlight important questions, with an emphasis on ethical data sharing as a means to help eliminate NTDs in the future.
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Information on the mosquito species that transmit canine filariosis is scanty. Hence, an experimental study was conducted to identify the potential vectors responsible for the transmission of Leidy and Buckley & Edeson. A total of 367 mosquitoes belonging to six species containing both laboratory and field strains (i.

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Tinea imbricata is a unique fungal skin disease that mostly affects indigenous populations in Southeast Asia, Oceania, and Central and South America. The control and management of this disease among these communities are challenging given their remote locations, certain traditional practices, and severe malnutrition status. To date, there are only a handful of reports published globally, which highlights the need for a more holistic approach in addressing this skin disease.

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Rickettsioses is a group of emerging infectious diseases in Southeast Asia caused by Gram-negative obligate intracellular bacteria in the Rickettsiae tribe. However, there is limited information regarding the vertebrate hosts of Rickettsia spp. in this region.

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Bartonelloses are emerging infectious diseases that are common in humans and animals worldwide. Several Bartonella species associated with companion animals such as Bartonella henselae and Bartonella rochalimae are species with zoonotic implications and have become a global concern. Other Bartonella species associated with wild animals, however, remain underappreciated particularly in the developing regions of the world.

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Purpose: Canine filariosis in domestic dogs caused by several species of filarids is an emerging vector-borne disease and the spread of this disease remains a global veterinary and public health concern. However, information regarding these filarids and their epidemiological patterns remains scarce in Malaysia. The present study aimed to determine the infection rate and associated risk factors of filarial parasites in dogs in Malaysia.

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