3/13/2016 Characteristics of Vibrios Epidemiology Oxidase test is used to differentiate sucrose Number of vibrios,particularly V.vulnificus positive Vibrio from Enterobacteriaceae and V.parahaemolyticus in surface waters Vibrios are oxidase positive or contain and shellfish correlate with seasonality cytochrome c Fig.2-Relationship betw erature and IFCO Characteristics of Disease Symptoms of the two most common Vibrio species differ Variation in the severities of Vibrio- associated diseases V.vulnificus illness Outcome depends on the person's underlying fever,chills,and nausea health Liver disease no diarrhea -Diabetes mortality:40%-60%of cases -GI disorders V.parahaemolyticus illness -Immune disorders diarrhea,abdominal cramps,nausea, -Long term steroid use Exceptions are V.cholerae O1 and 0139 as vomiting these bacteria infect non-compromised mortality:low people as well 3/13/2016 4 Characteristics of Vibrios • Oxidase test is used to differentiate sucrose positive Vibrio from Enterobacteriaceae - Vibrios are oxidase positive or contain cytochrome c tetramethyl-p￾phenylenediamine dihydrochloride Epidemiology • Number of vibrios, particularly V. vulnificus and V. parahaemolyticus in surface waters and shellfish correlate with seasonality Characteristics of Disease • Variation in the severities of Vibrio – associated diseases • Outcome depends on the person Outcome depends on the person s underlying ’s underlying health - Liver disease - Diabetes - GI disorders - Immun sor rs e disorders - Long term steroid use • Exceptions are V. cholerae O1 and O139 as these bacteria infect non-compromised people as well • Symptoms of the two most common Vibrio species differ V. vulnificus illness - fever chills and nausea fever, chills, and nausea - no diarrhea - mortality: 40% - 60% of cases V. parahaemolyticus illness - diarrhea abdominal cramps nausea diarrhea, abdominal cramps, nausea, vomiting - mortality: low