WHAT THE EVIDENCE SAYS
Investigators screened tissues from 189 free-living bats sampled at human–animal interfaces in Midwest Brazil in 2017–18. All tested tissues were negative by RT-qPCR for six arboviruses; neutralization testing did not establish Oropouche or Mayaro seropositivity, although weaker Mayaro plaque reductions warrant investigation.
WHY IT MATTERS / OUR READ
Wildlife disease intelligence should preserve negative findings and avoid converting incomplete serological signals into transmission claims.
CAVEATS / UNCERTAINTY
Limited species, region, years and sample sizes. No positive results here does not rule out circulation elsewhere or at other times.
SOURCE
Garrido et al. · EcoHealth (2 Nov 2026)
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