Hood River County health officials are trying to locate the source of some cases of campylobacteriosis in the community.  Hood River County Health Department environmental health response coordinator Ian Stromquist says they have not yet identified a source of the gastrointestinal illness that is most commonly caused by consuming raw or undercooked poultry.  He says they would like to hear from people who think they may have contracted the illness as they try to track down a source.  Stromquist says the illness can last about a week with symptoms including bloody diarrhea, abdominal cramps, and nausea.  He adds sometimes the illness is mild, but it can also cause people to be hospitalized.