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Activities of Entomology Unit

. Last Updated: 18 January 2012Hits: 20377

Today, the Medical Entomology Unit has focused on a variety of research scope as follows:

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DENGUE VECTOR RESEARCH – BIONOMICS, MONITORING AND CONTROL

Research projects on dengue vector focused on bionomics of transgenic Aedes aegypti compared to wild species or other genera of mosquitoes, including observations on the life cycle, hatching eggs, the larvae and adult stages of development, cycle gonotrofics, pupation, mating and survivorship.  In addition, survivals of the transgenic Aedes mosquito in the field are tested. The impacts of predation on Toxorynchites against trangenics mosquito are also investigated. Surveillance of Aedes mosquito presence in the university campus in Kuala Lumpur, and in other areas in Kedah, Terengganu, Perak has also been carried out, in which type of reservoir, viruses and GPS location were also recorded.

ento-image002Aedes aegypti

RESEARCH ON MALARIA VECTOR - BIONOMICS, MONITORING AND CONTROL

Research on vector of malaria in Pahang continues with study on the characteristics of Anopheline mosquito larvae habitat. Grassy puddles were found to be main breeding place. GIS maps for Anopheles maculatus in Kuala Lipis also been developed using the GPS carried out.

ento-image003Anopheles mosquito

RESEARCH FILARIASIS VECTOR- CONTROL AND MONITORING

Detection of elephantiasis disease parasite carried by mosquitoes using molecular techniques has been carried out. The unit is also involved in filariasis elimination programs - for Global Filariasis elimination Programme.

RESEARCH ON JAPANESE ENCEPHALITIS VECTOR - MONITORING AND CONTROL MEASURE DEVELOPMENT

Bionomics of Culex mosquito and other mosquitoes were monitored in swine breeding places and JE cases reported. Vector capacity of several mosquito were studied in the laboratory by "artificial feeding" technique and found several mosquito are potential for JE vectors.

RESEARCH ON OTHER MEDICALLY IMPORTANCE INSECTS - MONITORING, RESISTANCE AND CONTROL

Studies of chikungunya vector have been conducted in three districts of Terengganu.  Aedes mosquitoes in three village districts were found negative with chikungunya virus. In addition, screening for arbovirus in wild monkeys have been carried out and so far there is no arbovirus found. Screening for Trypanosoma evansi was conducted on various types of biting flies found on the farm of Universiti Putra Malaysia. Maggot therapy development, especially for treating wounds that are difficult to cure continued and enhanced. In addition, the study also proceed with the identification of forensic PMI (postmortem interval), and various species of flies on the dead monkeys and ecologically different in various places including the home. Identification of forensic fly species in high-rise buildings, as well as identification of antibacterial activity in Lucilia cuprina was also carried out. Collaboration with the Police Department and the hospital, identification of important flies in human corpses were also conducted. Identification for sand flies and coastal biting midge received from various departments, individuals and companies are still ongoing. 

ento-image005Phlebotomus sand fly found in some limestone area of Malaysia

ento-image007A biting midge Leptoconops spinosifrons blood fed and caught at Bagan Lalang beach

ento-image009Bare leg-landing catch at beach of Pulau Besar, Johor

ento-image011Island to island Leptoconops infestation survey at Mersing islands using inflatable boat 

RESEARCH BIOLOGICAL CONTROL AGENT- ISOLATION, BIOASSAYS AND FIELD TESTING

Isolation, identification and characterization of Aedes mosquito pheromone continue. Some isolates were identified to be potential as mosquito attractant were tested at laboratory and semi-field. Comparison of two formulations of BTI VectoBac VectoBac WG and 12AS were tested against Aedes aegypti and Culex quinquefasciatus in simulation study.  Susceptibility of mosquitoes on Bti WG also investigated. Collaboration with FRIM we also investigate the larvicidal activity of the plant Ocimum tenuiflorum, Citrus hystrix and Citrus aurantifolia on Aedes aegypti and Culex quinquefasciatus.

ento-image013Mass spec chromatography of some isolated extract of Aedes aegypti in pheromone project

CHEMICAL RESEARCH - LABORATORY AND FIELD TESTING, TEST ON EQUIPMENT, STUDY ON RESISTANCE

Among the studies, resistance of Anopheline mosquito on insecticides, mosquitoes survival after 24 hours of insecticide sprays made, comparison the effectiveness of cyfluthrin and permethrin insecticides space spray, assessment on IMR Autocidal Trap in Aedes mosquito control, comparison of effectiveness of various types of treated mosquito nets.

ento-image015Field evaluation of cyfluthrin on Aedes mosquito

MOLECULAR ENTOMOLOGY - MOLECULAR APPROACH IN ENTOMOLOGY STUDY

Detection of malaria parasites, Brugia malayi and Wuchereria bancrofti in mosquitoes by using duplex PCR.  PCR technique was also used to detect dengue fever virus and chikungunya in mosquito. Molecular techniques are also used to identify species of forensics importance flies in study of post-mortem interval.

COMMERCIALISATION OF RESEARCH FINDINGS - MOSQUITO CONTROL AGENT, RESISTANCE TEST KIT

Production of a local bacterial isolates to eradicate mosquito, the Bacillus thuringiensis H-14 has been commercialized under the brand name "Mosbac".

A rapid kit to detect resistance status of insecticidal, "IMR Comprehensiv Insecticide Resistance Test Kit" has been successfully commercialized.

Clinical studies "Debridement Maggot Therapy" is the use of local fly maggots, Lucilia cuprina for the treatment of difficult wounds was treated successfully. Production of sterile maggots at commercial scale has been licensed to a local company. This company is now supplying sterile maggots to hospitals for the treatment.

IMR Autocidal Trap has been tested in field and has attracted several companies and is trying to commercialize.

ento-image017Insecticide Resistance Test Kit

ento-image019Maggot Therapy-before

ento-image021Maggot Therapy-after

ento-image023IMR Autocidal Trap parts

ento-image025IMR Autocidal trap can be hold at tree branches

ento-image027Many Aedes mosquitoes were trapped on the sticky strip of IMR Autocidal Trap at Melaka field trial

myGOV MAMPU JPA IKU MSC NMMR CRC MyHEALTH MOH Globinmed SPA krste.my

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