From the moment my brother invited me to visit him on the north shore of Oahu, all I could think about was the fragrance of Hibiscus wafting through the evening air, miles of white sand beaches, steel guitar and ukulele music and papayas growing in the front yard. What I hadn’t thought about were the rats. Besides being home to quaint Waikiki, the Polynesian Cultural Center, outrigger canoe rides and bronzed girls in grass skirts, Oahu is famous for its nightlife: 7 varieties of Geckos, 17 species of amphibians, dozens of poisonous lizards, snakes, spiders, frogs, toads, centipedes and the biggest rats known to man. Rats that carry fatal diseases…