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Intro: A few communities collect date palm sap throughout the year to ferment and consume. This study's objective was to characterize Pteropus bats’ sap feeding behavior around the year to identify the potential for sap contamination with bat excreta. Methods: We used infrared cameras to observe bats' feeding behavior for 28 tree-nights per month for 22 months from March 2013 to December 2014. We placed the cameras at 4 sap-producing date palm trees focused on the sap- producing surface and collection pot from 5:00 PM to 6:00 AM for seven consecutive nights. We extracted the number and duration of bat visits and duration of contact with date palm sap from the images. Findings: We recorded a total of 26,870 bat visits (5% Pteropus, 90% non- Pteropus and 5% unidentified) from 616 observation tree-nights. Median duration of each visit was higher for Pteropus bats than non-Pteropus bats (8 versus 0.03 minutes, P< 0.001). Median duration of contact with date palm sap was higher for Pteropus bats (0.67 versus 0.03 minutes, P

Intro: Rift valley fever (RVF) and Q fever are vector-borne zoonotic diseases affecting both humans and many animal species, and are responsible for a high rate of abortion in infected domestic ruminants. Although animals are the main source of RVF and Q fever outbreaks in humans globally, the disease remains underestimated in Bangladesh. In order to fill this gap, we conducted a cross- sectional study to determine the seroprevalence of RVF and Q fever and to identify the potential risk factors associated with their infection in domestic ruminants in Bangladesh. Methods: We collected 568 blood samples from camels (n = 36), cattle (n = 56), sheep (n = 357), and goats (n = 119) from three districts in Bangladesh between 2017 and 2018. We administered a pre-tested questionnaire during sample collection. We tested serum samples using a competitive enzyme linked immunosorbent assay (c-ELISA) to detect RVF and G fever specific immunoglobulin (IgG). Findings: The overall seroprevalence of Q fever was 8.45% (n = 48; 95% CI: 06.3–11.0), comprising of camel-16.67%, goats-10.08%, sheep-7.84%, and cattle-3.57%. Seroprevalence was higher in adults (n = 45; 10.3%), fair body condition (n = 6; 19.35%), and animals fed on a zero-grazing system (n = 43; 11.23%). In a multivariable logistic regression model, animal species and body condition score were significantly associated with Q fever seroprevalence (p