Our findings of RESTV infection in Philippine bats are supported by those of Taniguchi et al. [17]. They reported antibodies to RESTV in Rousettus amplexicaudatus from two locations in Luzon. As they sampled different bat populations, and one to two years prior to our study, our negative findings in R. amplexicaudatus in this study, while frustrating, are not overly surprising given the cryptic nature of filovirus infection and detection in bats [5]. Indeed, Tanaguchi et al. [17] screened 141 bats in total from 17 species, only confirmed RESTV-specific antibodies in 3 of 16 R. amplexicaudatus, and failed to detect any RESTV-specific amplicons by RT-PCR.