An evaluation of the current coverage and diminished rate of mosquito nets usage for malaria control plays an important role in malaria control planning. A survery was carried out between 1995 and 2003 in 15 hamlets of five communes of 3 malaria endemic districts in Thua Thien – Hue province. A high rate of bed-net usage was found in the surveyed hamlets. In average, the coverage reached the rate of 2.0 ± 0.3% nets per person. However a considerable rate of damaged nets (4.7 ± 1.2%) was also recorded in the surveys. Further surveys and studies should be conducted to determine the ways the bed-nets go down and get diminished for planning of more appropriate malaria control measures
Malaria ; Culicidae ; Mosquito Control

Adeal is a new type of larval mosquito control compound that inhibits larval development and emergence. Adeal is effective against various kinds of mosquitoes, including Anopheles spp., Aedes spp., and Culex spp. Long - term efficacy, even at a lower application dosage, easy handling requiring no special spraying or misting equipment. Adeal has been successfully tested in Japan, USA, Thailand, Sudan, Tanzania and Solomon Islands
Culicidae ; Mosquito Control

Studying the susceptibility of Aedes aegypti to some insecticides in 22 places of 11 provinces and cities in 4 different regions of Vietnam. Results: Ae. aegypti mosquito was still susceptible to Malathion but resistant to DDT in most of studied places. Ae. aegypti was susceptible to insecticides of perythroid group (such as permethrine, lambda-cyhalothrine, deltamethrine, and alphamethrine) in many places in Northern and Central Vietnam, while it was resistant in Southern Vietnam and the Central Highlands. Ae. aegypti was also resistant highly and widely to etofenprox
Insecticides ; Mosquito Control ; chemistry

An. minimus was collected from Hoa Son village, Luong Son district, Hoa Binh province in November 1997 and maintained in the laboratory of NIMPE by artificial mating techniques. Since 51st generation, a free mating colony in the small cages (with dimensions of 30 x 30 x 30cm) has been established by releasing 200 male and 200 female mosquitoes per cage. The releasing of additional 50 males of An. minimus to the cage has been found to stimulate the mating process in small cage
Anopheles ; Laboratories ; Mosquito Control

Background: Dengue Fever/Dengue Hemorrhagic Fever (DF/DHF) has emerged as one of the most important public health concerns in Viet Nam in recent years. Key breeding containers plays an important role in driving dengue vector control in the public. Objectives: The research was conducted to discover the dengue situation, its vectors and key containers to make relevant recommendations in reducing effectively the vector population. Subjects and methods: Two hundred households in two communes of Nam Dinh province (100 in each studied commune) were selected randomly. Vectors collected from the field were identified using mosquito key. The number of dengue larvae and mosquitoes were directly counted or adjustment methods were used to estimate the true number in each type of water storage facility. Results: In Minh Thuan commune, Ae. albopictus larvae were mainly concentrated in jars (49%) and discards (59%), most of Ae. aegypti was found in cement tanks with a volume more than 500L (72%). In Trung Dong commune, larvae of Ae. albopictus concentrated in jars (40%) and discards (25%) and aquariums (15%), while most of the Ae. aegypti larvae was discovered in cement tanks with volumes more than 500L (86%). Mosquito density index of Ae. albopictus in Trung Dong and Minh Thuan communes was 0.56 and 0.38, respectively. The Aedes larvae, houses for larvae and Breteau index were nearly at the threshold of dengue epidemic occurrence for Ae. aegypti and over a certain threshold for Ae. albopictus. Some recommendations were provided to help reduce the dengue vectors. Conclusion: Investigation of key mosquito larvae in water containers was useful in driving the effective dengue vector control. Further studies are required to evaluate the impact and methods to manage water containers in the local area.
Dengue fever ; mosquito ; vector control

OBJECTIVE: This study assessed the species composition of mosquitoes collected from ovitraps in selected public schools of Metro Manila, Philippines.

MATERIALS AND METHODS: Ovitraps were installed from November 2013 to February 2014, in purposively selected public elementary and high schools of Metro Manila. Ovitraps were installed inside classrooms and collected weekly and examined for mosquito eggs and larvae. Speciation was done once a month from November 2013 to February 2014. All positive paddles were immersed in water for larval emergence, reared to fourth instars and were identified using taxonomic keys.

RESULTS: A total of 1,482 ovitraps were installed in the selected public schools, and 18,325 larvae were collected from elementary schools, while 16,670 larvae were collected from high schools. The mean ovitrap index or infestation rate was 49.69% during the period of data collection. Mosquito larvae were identified as Aedes aegypti (88.94%) and Aedes albopictus (11.06%). Aedes aegypti and Aedes albopictus coexisted in some of the examined paddles. No significant differences were observed between the type of school and the presence of Aedes larvae. Significant differences were observed between total number of mosquito larvae and months of collection.

CONCLUSION: The presence of Aedes mosquitoes in schools evidently shows that continuous vector surveillance in schools is necessary as this information will help in the formulation of proactive vector control activities, thereby preventing the occurrence of mosquito-borne diseases.

INTRODUCTION

Effective mosquito control is pivotal in the epidemiology of vector-borne diseases, but no successful preventive measures have been recorded for dengue vector control. Hence, possible alternatives to chemical larvicides have been explored, including plant alcoholic extracts. This study determined the larvicidal efficacy of Annona squamosa ethanolic leaf extracts against third instar larvae of Aedes aegypti.

Three replicates of varying concentrations of Annona squamosa ethanolic extract (i.e., 10%, 40%, and 70%) versus positive (Novaluron) and negative controls (tap water) were used to determine larval mortality.

Greatest larval mortality was noted using the 70% concentration (i.e., 24% versus the observed values of 20% and 8%, respectively for the 40% and 10% ethanolic concentrations). Relative to the controls, the mean differences in the mortality rates of the Aedes aegypti larvae across the leaf ethanolic concentrations were statistically significant (i.e., p-value < 0.05). There was increasing trend in larval mortality over time, but 50% lethal dose was not achieved. In conclusion, the different Annona squamosa ethanolic leaf extracts could be used as alternative botanical larvicides against Aedes species.

Aedes alboscutellatus was recorded first in Korea. This mosquito was collected near Demilitarized Zone of Korea Penninsula from 1979-1980. Its morphology and taxonomical position was described(abstracted from English content).
parasitology-arthropoda ; mosquito ; Aedes alboscutellatus ; morphology ; taxonomy

Olyset net sunk with 2% permethrin was used in Hai Duong, Hai Phong, Thai Binh. The rate of density index and house index were decreased from 0.23 and 23.3 to zero and persisted by 9 months. Breteau index and larve-house index was also decresed from 8.3 and 6.7 to zero. Olyset net showed its effect on Aedes aegypti and in various mosquitos and insects
Dengue Hemorrhagic Fever ; Mosquito Control ; Disease ; epidemiology

In the study from 2002 to 2003, all participants were Raklay ethnic volunteers for mosquito collection for 5-8 years. Malaria parasitaemia was found in 40% of participants who had been beaten by sporozoites-infective An.dirus. The chance of infection depended on immune level, participant’s constitution, quantity and age of sporozoites… Monthly prophylaxis therapy with single dose of mefloquine reduced a possibility of malaria infection for forest sleeping people
Malaria ; prevention & control ; Mosquito Control ; therapeutics ;