The term rickettsial disease is identified in base64 scheme by the sequence cmlja2V0dHNpYWwgZGlzZWFzZQ==, while the MD5 signature is equal to d63ea556369223babedad5fa92dbfec4. The ASCII encoding of rickettsial disease in hexadecimal notation is 7269636b6574747369616c2064697365617365.