BRIDGETOWN, Barbados - HAT BARBADOS HAS a serious health challenge on its hand cannot be denied, downplayed or dismissed. We speak of a spike in the incidence of dengue fever that must be a cause of concern for all of us on the island and indeed visitors to our shores. Our fears are made all the more worrisome by the news that there has been one confirmed death so far this year from the mosquito-borne illness. Part of the problem we now face with an upsurge in the mosquito problem has to do with the persistent showers recorded within recent months. The entire country is lush green and both the food crop and livestock farmers have nothing to complain about as it relates to water for their produce and animals.