Efficacy and community effectiveness of larvivorous fish for dengue vector control
Although the use of larvorous fish as single agent or in combination with other control measures can lead to a reduction in immature vector stages, evidence to assess community effectiveness is still insufficient.
Dengue is one of the fastest emerging infection and the control of the mosquitoes or human vector control remains the only ways of preventing transmission. Biological control offers a range of advantages and the use of larvivorous fish continues to be listed as a potential method of dengue vector control by the WHO. This study aimed at evaluate the efficacy and community effectiveness of larvivorous fish in the control of dengue vectors and transmission when used a single agent or in combination with other vector control methods. Thirteen articles met the criteria for inclusion: 3 were efficacy studies (2 were intervention-control and 1 pre-post intervention) – and 10 community effectiveness studies (7 intervention-control and 3 pre-post intervention). All efficacy studies reported the impact of fish on larval counts in tanks and 9 community effectiveness studies reported a reduction in immature forms of dengue vector. Study design was poor across all studies and none were randomised controlled trials.