Proportion of live-captured seals with antibodies against influenza A virus.

<p>Serum samples collected from live-captured (sub)adult harbor (<b>A</b>) and gray (<b>B</b>) seals were tested for the presence of antibodies against the NP using an influenza A virus NP blocking ELISA (white bars) and the hemagglutination inhibition test (gray bars). The numbers above the bars indicate number of sera tested.</p

Proportion of seals admitted to the SRRC with antibodies against influenza A virus.

<p>Serum samples collected from harbor seal pups (<b>A</b>) and harbor seal weaners (<b>B</b>) seals were tested for the presence of antibodies against the NP using an influenza A virus NP blocking ELISA (white bars) and the hemagglutination inhibition test (gray bars). N.D.: no data (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144899#pone.0144899.t001" target="_blank">Table 1</a>). The numbers above the bars indicate number of sera tested.</p

Geographical distribution of seals with H10N7 antibodies in 2015 in the Netherlands.

<p>Map of the Netherlands with proportion (black sector) of the total (complete pie) harbor seal pups (A), harbor seal weaners (B), (sub)adult harbor seals (C) and non-pup gray seals (D) with antibodies against the seal HA of influenza A(H10N7) virus. The coastal regions where samples were collected in 2015 are indicated in dark grey: (Wadden Islands, W; Groningen, G; Friesland, F; North-Holland, N; South-Holland, S; and Zeeland, Z). The number above the pie charts indicate the number of serum samples tested per region. The map of the Netherlands was adapted from: <a href="https://pixabay.com/en/netherlands-holland-map-europe-303419/" target="_blank">https://pixabay.com/en/netherlands-holland-map-europe-303419/</a>.</p

Geometric mean antibody titers and duration of antibodies against influenza A(H10N7).

<p>GMT (± s.d.) of seals with antibodies against influenza A(H10N7) virus in 2015 (<b>A</b>). The numbers next to the group names indicate the number of sera tested. Temporal change in HI antibody titers in four individual harbor seal weaners that tested seropositive upon admission (<b>B</b>).</p