FIG. 3.
Inactivation of F-specific RNA coliphages in seawater (•, subgroup I infective; ▪, subgroup II; ▾, subgroup III; ▴, subgroup IV) and the quantity of the phage particles detected using the real-time RT-PCR protocol (○, subgroup I; □, subgroup II; ▿, subgroup III; Δ, subgroup IV RT-PCR). Symbols indicate the means, and bars indicate the standard errors. The detection limit of the DAL assay was 1 PFU/ml, which corresponds to −6 on the y axis.