RT Journal A1 Kuehn BM T1 REcord heat may have contributed to a banner year for west nile virus JF JAMA JO JAMA YR 2012 FD November 14 VO 308 IS 18 SP 1846 OP 1848 DO 10.1001/jama.2012.13495 UL http://dx.doi.org/10.1001/jama.2012.13495 AB This surge in cases—which was concentrated in Texas, Mississippi, Michigan, South Dakota, Louisiana, Oklahoma, and California—likely resulted from a confluence of ecological factors, including higher-than-normal temperatures, that may have influenced mosquito and bird abundance, the replication of the virus in its host mosquitoes, and interactions of birds and mosquitoes in hard-hit areas, according to Lyle Petersen, MD, MPH, Director of the CDC's Division of Vector-Borne Diseases. Petersen discussed this year's resurgence of West Nile virus with JAMA.