Volume 18, Number 7—July 2012
Dispatch
Influenza Virus Infection in Guinea Pigs Raised as Livestock, Ecuador
Victor H. Leyva-Grado, Samira Mubareka, Florian Krammer, Washington B. Cárdenas, and Peter Palese
Table 2
ELISA results for the presence of influenza B virus antibodies in guinea pigs from different regions of Ecuador*
| Region | No. (%) positive, by antigen† |
||
|---|---|---|---|
| Whole virus (Yamagata88) | Recombinant hemagglutinin | Recombinant nucleoprotein | |
| Cuenca, n = 20 | 17 (85) | 18 (90) | 18 (94)‡ |
| Guayaquil, n = 10 | 8 (80) | 9 (90) | 9 (90) |
| Manabí, n =10 | 2 (20) | 1 (1) | 1 (10) |
| Total | 27 | 28 | 28 |
*Samples were from adult guinea pigs raised as livestock on local farms (Cuenca) or from live animal markets (Guayaquil and Manabí). Whole virus, B/Yamagata/16/1988. Recombinant hemagglutinin was derived from B/Florida/04/2006; nucleoprotein was derived from B/Yamagata/16/1988.
†Serum samples were considered positive if absorbance (read at 405 nm) was higher than the value of the negative control (naive guinea pig serum) + 3 SD.
‡Only 19 samples were tested.
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