Increasing resistance of malaria vectors to insecticides has ever been a major problem in the world as well as in Vietnam, partly due to the vectors (mosquitoes belonging to Anopheles species) showing increased persistence or even resistant to insecticides.

On 31^th July 2013, the National Institute of Malariology, Parasitology and Entomology (NIMPE), sponsored by the World Health Organization (WHO), held the workshop o­n the situation of malaria vectors and proposed use of insecticides for the period of 2014 - 2016, which aimed at evaluating, identifying some characteristics of malaria vectors at present time, and proposing insecticidal use for vector control in the period 2014-2016. The workshop contained reports o­n the distribution, density, biological and ecological characteristics, roles of transmission and susceptibility/resistance of malaria vectors to insecticides o­n over the world and in Vietnam. In addition, propose insecticides which can be used in malaria control and elimination programs during 2014 - 2016 were also discussed in the workshop. Dr. Tran Thanh Duong, Director of NIMPE presided the workshop together with the participants of representatives from departments, institutes such as the Department of Preventive Medicine (02 people), World Health Organization (WHO) (02), NIMPE (21), IMPE - Quy Nhon (06) and IMPE - Ho Chi Minh city (06).

In the opening speech at the workshop, Dr. Tran Thanh Duong highlighted the insecticidal resistance of malaria vectors, which remained major obstacles to vector control activities of Malaria Control and Elimination Programme in Vietnam and in the world as well.

In the o­ne-day workshop, interesting reports and discussions o­n climatic changes in relation to malaria vectors were presented to participants by various authors such as: risks of returning malaria Dr.Ho Dinh Trung, vice-director of NIMPE; The efficacy and safety of Termosant 10SC for malaria vector control in Southern ? Lam Dong region by Mr. Tran Nguyen Hung, IMPE-Ho Chi Minh city; Ecology and transmission roles of vector-borne diseases in Viet Nam by Dr. Vu Duc Chinh, head of department of entomology, NIMPE; Some research results o­n malaria vectors and use of insecticides in the Central-West Highland region, and proposed use of insecticides by Dr. Nguyen Xuan Quang, head of the Department of Entomology, IMPE-Quy Nhon. In general, the reports showed it was the natural selection that helped mosquitoes to increase persistence to insecticides, reproduced quickly and produced resistance generations which changed their genetic structures of mosquito population.

Participants in the workshop

The discussions afterward mentioned to the situation of insecticide resistant vectors and overcome measures, proposed use of effective insecticides for malaria control in 2014 - 2016 in order to prevent the spread of insecticidal resistance in Viet Nam.

Based o­n the results of the workshop and practical vector control activities in Viet Nam, the NIMPE will propose a variety of insecticides for the Malaria Control and Elimination Program in 2014 ? 2016.

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