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Fig. 3 | Parasites & Vectors

Fig. 3

From: Monthly biological larviciding associated with a tenfold decrease in larval density in fish farming ponds and reduced community-wide malaria incidence in northwestern Brazil

Fig. 3

Interrupted time-series regression analysis of average monthly larval densities in Vila Assis Brasil before (September 2017–October 2018), during (November 2018–October 2019), and shortly after larviciding (November 2019). The solid line shows the trend based on least-squares linear regression fitted to empirical data (black dots) adjusted for a time-dependent variable (rainfall estimates 15 days prior to larval sampling) and for autocorrelation of residuals over time. The dashed vertical line indicates the time of the first larvicide application. No larvicide treatment was applied in May 2019 (see the main text for details)

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