Table 2 A summary of EHP histological findings of P. vannamei exposed to EHP-containing fecal strings in two independent challenges at three different salinities. G0-G4 indicates the degree of severity (number of positive / number of total shrimp; [prevalence %](Lightner, 1996)

#1

G4 (1/4)

G0 (3/4)

[25%]

G1 (2/6)

G0 (4/6)

[33.3%]

G1 (1/4)

G0 (3/4)

[25.0%]

G4 (1/14)

G1 (3/14)

G0 (10/14)

[28.5%]

#2

G3 (1/6)

G1 (1/6)

G0 (4/6)

[33.3%]

G1 (3/10)

G0 (7/10)

[30.0%]

G4 (3/8)

G3 (1/8)

G2 (2/8)

G1 (1/8)

G0 (1/8)

[87.5%]

G4 (3/24)

G3 (2/24)

G2 (2/24)

G1 (5/24)

G0 (12/24)

[50.0%]

Combined data

G4 (1/10)

G3 (1/10)

G2 (0/10)

G1 (1/10)

G0 (7/10)

[30.0]

G4 (0/16)

G3 (0/16)

G2 (0/16)

G1 (5/16)

G0 (11/16)

[31.2%]

G4 (3/12)

G3 (1/12)

G2 (2/12)

G1 (2/12)

G0 (4/12)

[66.65]