| use of the rapid-ana system and sodium polyanetholesulfonate disk susceptibility testing in identifying haemophilus ducreyi. | haemophilus ducreyi has traditionally been difficult to identify. we have utilized simple test methods to identify 19 fresh isolates obtained during a recent outbreak of chancroid in houston and six strains of h. ducreyi from other outbreaks. tests were performed from growth on chocolate agar after 48 h of incubation at 35 degrees c with increased humidity and co2. all isolates exhibited typical colonial morphology and gram stain. isolates were catalase negative and oxidase and nitrate positive ... | 1990 | 2153697 |