Hospitals, sanitariums, rest homes or nursing homes for other than insane or mental cases, may be permitted as conditional uses in residential districts provided that any such use shall have a lot area of at least five acres and a minimum frontage of 500 feet with access to at least one major or collector thoroughfare. Any such use caring for contagious diseases shall have at least one acre in lot area per bed in addition to the other requirements set forth herein. (Ord. 914. Passed 11-8-66.)