Volume 7, Number 4—August 2001
THEME ISSUE
West Nile Virus
West Nile Virus
Fatal Encephalitis and Myocarditis in Young Domestic Geese (Anser anser domesticus) Caused by West Nile Virus
Table
Plasma virus titers (log10 TCID50/0.1 mL)a by days PI |
||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Group-bird identification | 0 | 1 | 2 | 3 | 4 | 5 | 7 | 10 | 14 | 21 |
Sham controls: | ||||||||||
58 | - | NS | - | NS | - | NS | - | - | - | - |
73 | - | NS | - | NS | - | NS | - | - | - | - |
WN virus-inoculates: | ||||||||||
6 | - | 1.5 | 5.5 | 4.5b | 2.5 | 2.5c | Dead | Dead | Dead | Dead |
78 | - | 3.5 | 4.5 | 3.5 | 1.5b | 1.5 | - | - | - | - |
80 | - | 2.5 | 5.5 | 2.5b | 1.5 | - | - | -c | Dead | Dead |
86 | - | 2.5 | 6.5 | 5.5 | 2.5 | 1.5c | Dead | Dead | Dead | Dead |
In contacts: | ||||||||||
8 | - | NS | - | NS | - | NS | - | - | - | - |
13 | - | NS | - | NS | - | NS | - | 2.5 | - | - |
aEndpoints in Vero cell cultures based on CPE and confirmation as WN virus by indirect fluorescent antibody test: NS = No sample, - = No cytopathic effect.
bWN virus isolated from oropharyngeal swabs; #6, 101.5/0.1 mL, #80, 100.5/0.1 mL, #78, 100.5/0.1 mL (reported as tissue culture infective doses [TCID50] titers in oropharyngeal swab media; originally each swab placed in 1.5 mL of phosphate-buffered saline supplemented with 0.75% bovine serum albumin).
cWN virus isolated from tissues at necropsy (TCID50/0.01 g): 1) Gosling #6 (5 days PI) - 103.5 in brain, 104.5 in heart, 101.5 in kidney and 103.5 in intestine; 2) gosling #80 (10 days PI) - 101.5 in brain and 101.5 in intestine; 3) gosling #86 (6 days PI) - 103.5 in brain, 102.5 in heart, 101.5 in kidney and 101.5 in intestine.