title: A case of acalculous cholecystitis in the course of dengue fever in a traveller returned from Brazil.
abstract: BACKGROUND
  Dengue is the second cause of fever after malaria in travellers returning from the tropics. The infection may be asymptomatic or it may manifest itself with fever only, some patients, however, may develop haemorrhagic symptoms and shock.
  
  
  METHODS
  A 58-year-old woman came to the University Centre of Tropical Medicine in Gdynia after returning from a tourist journey to Brazil because of fever up to 39°C and malaise. She had lived in South America many years and then moved to Europe 3 years before hospitalisation. On admission physical examination revealed fever, dry mucosa, moderate hypotension and tachycardia. In the laboratory test results, leukopoenia, thrombocytopoenia and elevated transaminases were observed. On the second day of the hospitalisation, the patient reported epigastric pain, clinical examination revealed tenderness of the abdomen and macular rash on the skin of the trunk and thighs. The ultrasonography revealed an enlarged gallbladder with thickened walls, with hypoechogenic area surrounding it, a dilated common biliary duct of heterogenic echo, and some free fluid in the peritoneal cavity. An exploratory laparotomy was performed after 24 h because of the persisting strong abdominal pain and high fever. Intraoperatively, enlarged mesenteric lymph nodes were found, with no symptoms of gallbladder pathology. The postoperative course was uncomplicated and the positive result of immunochromatographic assay for dengue was obtained.
  
  
  RESULTS
  The acalculous cholecystitis has been described in the course of various diseases and conditions. The typical symptoms include pain in the right hypochondriac region, fever, positive Murphy's sign, and abnormal liver function tests, which were observed in the presented case. Cholecystectomy is not usually indicated in the course of dengue (typically a self-limiting disease) due to a high risk of bleeding.
  
  
  CONCLUSIONS
  The case provides a rationale for the inclusion of acalculous cholecystitis in the differential diagnosis in patients with abdominal pain returning from dengue endemic areas.
authors.forename: Anna
authors.initials: A
authors.lastname: Kuna
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Wroczyńska
authors.affiliation: Department of Infectious Diseases, Medical University of Gdańsk. mgajewski@gumed.edu.pl.
authors.forename: Michał
authors.initials: M
authors.lastname: Gajewski
authors.forename: Iwona
authors.initials: I
authors.lastname: Felczak-Korzybska
authors.forename: Wacław L
authors.initials: WL
authors.lastname: Nahorski
mesh_terms: D042101:Acalculous Cholecystitis / Q000175:diagnosis / Q000821:virology*; D001938:Brazil; D003715:Dengue / Q000150:complications / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged; D011044:Poland; D014195:Travel
keywords: acalculous cholecystitis; dengue