St. Louis Encephalitis (SLE). St. Louis Encephalitis (SLE) is transmitted from birds to man and other mammals by infected mosquitoes (mainly some Culex species). SLE is found throughout the United States, but most often along the Gulf of Mexico, especially Florida.Major SLE epidemics occurred in Florida in 1959, 1961, 1962, 1977, and 1990.t. Louis Encephalitis (SLE). St. Louis Encephalitis (SLE) is transmitted from birds to man and other mammals by infected mosquitoes (mainly some Culex species). SLE is found throughout the United States, but most often along the Gulf of Mexico, especially Florida.
Seven Years. Keep any tax return and documentation that includes a claim for deducting worthless securities for seven years. There you have it. Check back in a few days and I'll share a few more tips on what to keep indefinitely and how to keep your records organized and safe.
Ask The Experts: How Long Should Tax Records Be Kept? December 13, 2010 (The Sacramento Bee) How long tax records should be kept and the amount of taxes owed on pension and Social Security income are issues addressed by IRS expert Jesse Weller. QUESTION: How long does the IRS require taxpayers to keep tax records? I hear it ranges from three to 10 years.