| relationships among weather, mosquito abundance, and encephalitis virus activity in california: kern county 1990-98. | the summer abundance of culex tarsalis in kern county, california, during 1990-98 was related quantitatively to rainfall, snow depth and water content, and runoff of the kern river. total monthly rain that fell during winter, lagged by 4-6 months, explained only 13% of the variability in the number of host-seeking females collected per trap night per month during summer. in contrast, regression analysis showed that river runoff 1 month earlier explained 67% of the variability in mosquito abundan ... | 2000 | 10757487 |
| seroprevalence of west nile virus in feral horses on sheldon national wildlife refuge, nevada, united states. | we screened 1,397 feral horses (equus caballus) on sheldon national wildlife refuge, nevada, united states, for igm and igg against flavivirus during 2004-2006, 2008, and 2009. positive serum samples were tested for neutralizing antibodies to west nile virus (wnv) and st. louis encephalitis virus (slev). one animal was positive for antibody against wnv in 2004, but all others tested in 2004-2006 were negative. in 2008 and 2009, we found evidence of increasing seropositive horses with age, wherea ... | 2011 | 21460023 |