“…The acalculous cholecystitis has been described in the course of various diseases and conditions including trauma, vasculitis, parenteral alimentation, mechanical ventilation, salmonellosis, staphylococcal infections, brucellosis, leptospirosis, rickettsiosis or cytomegaly [6,[8][9][10][11][12][13][14]. The thickening of gallbladder wall is the most frequent (43-59%) ultrasonographic finding in patients with dengue fever [15,16] whereas in the case of dengue haemorrhagic fever it may be found in up to 90% of patients [17][18][19][20].…”