Malariology
Parasitology
  • Evaluating the result of communit-based helminth prevention models

    The study was conducted to evaluating the effectiveness of community-based helminth prevention models in 6 commune of 3 provinces in the Southern region - Lam Dong province from June 2017 to December 2018 by cross-sectional study, community interventions (Helminth deworming and community communication, environmental sanitation) and human fecal testing. The results of human fecal testing by Kato - Katz method, showed that: Before interventions, the prevalence of soil-transmitted helminths was 24.46% (171/699), flukes 0.00% (0/699), tapeworms 0.00% (0/699). After intervention, In 3 communes, where applied model of community-based helminth deworming by Mebendazole 500mg after 6 months and 12 months, the prevalence of soil-transmitted helminth was 1.71% (12/700) and 2.00% (14/700). In 3 communes, where applied model of community communication and environmental sanitation after 6 months and 12 months, the prevalence of soil-transmitted helminthes was 5.29% (37/700) and 4.86% (34/700).
    Keywords: Neglected tropical diseases, helminth deworming, community communication, southern of Vietnam.
  • The environment, socio-economic and helminthiases infection in the mekong delta region

    The study was conducted at 6 sites of 3 provinces in the Mekong Delta region from June 2017 - December 2017 by collecting samples, surveying K.A.P and laboratory tests. The objective of the study was: Determine the prevalence of helminths in the environment, human and socio-economic factors related to helminth infections in the study region.
    A total of 1,402 fecal samples and 2,002 human blood samples (< 2 years old); 126 soil samples, 120 water samples, 61 vegetable samples; 600 K.A.P were collected, investigated and tested. The results showed that: The prevalence of helminths in fecal samples was 5.71% (80 / 2.402) and 80.27% (1,607 / 2002) blood samples had antibodies against helminth antigen; the prevalence of helminths in soil samples was 3.17% (4/126), vegetable samples 24.59% (15/61), water samples 0.00% (0/120); determined some socio-economic factors related to helminth infections of human in the Meekong Delta region.
    Key words: helminths infection, environment, socio-economic, Mekong delta.
  • The helminth prevelence in Southern region – Lam Dong province and effectiveness of community – based helminth prevention methods

    Background: Soil-transmitted helminths are one of the most common infectious diseases on worldwide and affecting to poor people and underdeveloped communities. Helminth diseases have so far been classified as "Neglected tropical diseases (NTD)", without adequate investment, but only a few domestic and foreign organizations which supported helminth prevention in regions that was high prevalence, but not regular. Therefore, the application of some community-based helminths prevention in the Southern region - Lam Dong province which is necessary.
    Objectives: Determining the prevalence of helminth infections in the Southern region - Lam Dong province and evaluating the effectiveness of community-based helminth prevention methods.
    Methods: Descriptive cross-sectional and community intervention.
    Results: The prevalence of soil-transmitted helminths was 24.46% (171/699), flukes 0.00% (0/699), tapeworms 0.00% (0/699). After intervention, In 3 communes, where applied model of community-based helminth deworming by Mebendazole 500mg after 6 months and 12 months, the prevalence of soil-transmitted helminth was 1.71% (12/700) and 2.00% (14/700). In 3 communes, where applied model of community communication and environmental sanitation after 6 months and 12 months, the prevalence of soil-transmitted helminthes was 5.29% (37/700) and 4.86% (34/700).
    Conclusions: Determined the prevalence of helminths and flukes in the study sites of the Southern region - Lam Dong province and effected community-based helminths prevention methods.
Ectoparasite
Dengue
  • Dengue fever vectors in the southern of Vietnam

    The dengue (DF)/dengue hemorrhagic fever (DHF) are mosquito-borne diseases known to occur in the whole country.
    The disease was reported in the northern provinces of Ha Noi and Hai Phong since 1959, then the disease has become widely spread throughout Vietnam. And in recent years the disease has had a great impact on South Vietnam, where the geographical distributions of Ae. aegypti and Ae. albopictus overlap, where simultaneously DF/DHF, as well as malaria is presenting.
Entomology
  • Application of molecular biology in the detection pathogens and medical arthropods in Southern Vietnam

    Molecular biology is a part of biology; based on physiology, genetic and biochemical. Molecular biology studies about the shape, structure, and function of macromolecules that have important roles in the life, such as nucleic acids, proteins…. Molecular biology techniques are very diverse and also applied in many different fields, such as molecular diagnostics (PCR, molecular hybridization); production of active substances detecting or treating diseases (producing monoclonal antibodies, making proteins with biological activity ...); gene therapy (recombinant ...). The molecular biology applications which the earliest and most visible are the medical fields. Based on genetic engineering, medicine not only relies on clinical symptoms but also impacts to directly the true reason that cause the disease: genetic abnormalities. Molecular biology pervate almost the medicine field; inside, the most potents are diagnostic and preventive
  • Determine the Presence of Pathogens on Ticks in the Mekong Delta Region

    Tick-borne diseases are an emerging medical and veterinary problem. Ticks are implicated in the transmission of different pathogens such as viruses, bacteria, protozoa and filarial nematodes. However, up to now researches on these pathogens in Vietnam which has been limited, especially in the Mekong Delta region (Southwestern of Vietnam). We have collected 4763 tick individuals of 7 species. 5 genus. 2 families (Argas sp.. Apononmta crassipes, Aponomma gervaisi. Rhipicephalus (Rhipicephalus) haemaphỵsaloides, Rhipicephalus (Rh.) sanguineus, Boophilus microplus, Ixodes (Ixodes) granulatus) at 8 sites in the Mekong delta region on the rainy season and dry season from 2015 to 2016 which determine the presence of pathogens (Rickettsia spp. and Orientia tsutsugamushi) on ticks. A total of 1457 tick individuals which were subdivided into 299 samples, that determine the presence of Rickettsia spp. and Oriental tsutsugamushi. Initial results, we have determined the presence of pathogen on ticks.
  • Species and distribution of tick (Gamasoidea), chigger mite (Trombiculidae), mite (Gamasoidea) in Southern Vietnam

    A cross-sectional study was conducted from June to October 2015 and March to April 2016 on species and distribution of ticks (Ixodoidea), chigger mites (Trombiculidae) and Gamasid mites (Gamasoidea) in the Southern Vietnam. As a result, 8,992 of ticks, chigger mites and gamasid mites (26 species, 12 genera, 5 families) were collected, of which Ixodoidea had 5 species, 4 genera, 1 family; Trombiculidae had 9 species, 4 genera, 1 family; Gamasoidea had 12 species, 4 genera, 3 families. The most common species in the area were Rhipicephalus (Rh.) sanguineus, Rhipicephalus (Rh.) haemaphysaloides, Boophilus microplus, Ascoschoengastia (L.) indica, Gahrliepis (W.) chinensis, Gahrliepia (W.) parapacifica, Leptotrombidum (L) deliense, Laelaps (E.) echininus, Laelaps (E.) sedlaceki, Ornithonyssus bursa. The highest number of species (21 species) was discovered in Bu Gia Map National Part and the lowest number of species (10 species) was found in Thu Dau Mot town.
  • Several other medical arthropods in southern of Vietnam (Ticks, chigger mites, and gamasid mites)

    Study on medical arthropod is limited in Vietnam, some investigations have shown that medically important arthropods include ticks, chigger mites, gamasid mites and fleas which are relatively common in many regions of Vietnam. The Institute of Malariology - Parasitology - Entomology in Ho Chi Minh City conducted surveys to identify species composition and distribution of several medical arthropods in southern Vietnam and assessing for the presence of pathogens for humans and animals.
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