Presentation on theme: "Infectious Diarrhea. Definition Of Diarrhea Increase in stool frequency or a decreased stool consistency Usual stool fluid content: 10 ml/kg/d in an infant."— Presentation transcript:
Definition Of Diarrhea Increase in stool frequency or a decreased stool consistency Usual stool fluid content: 10 ml/kg/d in an infant and > 200 g/d in the teenager and adult Acute diarrhea- lasting less than 2 weeks
Acute Infectious Diarrhea Inflammatory -intestinal invasion - Cytotoxins (enhanced electrolyte secretion by the crypts) Noninflammatory - enterotoxin production - -villous surface destruction
Labs Fecal leukocytes (shows invasion, cytotoxin production) Stool O and P Stool culture
Always culture stool for Salmonella, Shigella, Yersinia and Campylobacter in the presence of clinical signs of colitis or if fecal leucocytes are found.
Acute Diarrhea Special Considerations fever, watery stool, gross blood Abrupt onset, frequent stools, no initial vomiting Methylene blue, stool exam PMN Giardia None Culture Shigella Salmonella Campylobacter Indicated Therapy Rehydration Defined Approach Y N N Y N Y &
White blood cells in a stool sample (Methylene Blue Stain).
Antibiotic Treatment BacteriaAntibioticIndication AeromonasTMP-SMXDysentery-like illness CampylobacterErythromycinEarly Clostridium difficileMetronidazole/ Vancomycin Moderate- severe disease ETECTMP- SMXSevere or prolonged EPECTMP- SMXNursery epidemic, life- threatening illness EIECTMP- SMXAll cases SalmonellaAmpicillin or Chloramphenicol or TMP- SMX or Cefotaxime Infants < 3 mns, immunodeficiency, typhoid fever ( S. typhi), bacteremia ShigellaTMP- SMX, Ceftriaxone All cases VibrioTetracyclineAll cases
References Behrman R., R. Kliegman and H.Jenson. Nelson’s Textbook of Pediatrics, 16 th ed. 2000, W.B. Saunders, pp 765-768. DeWitt, T. Acute Diarrhea in Children. Pediatrics in Review. 1989; 11; 6-12 Huicho, Luis MD. Diagnostic Approach to Acute Infectious Diarrhea: The State of the Art. Bull. Inst. Fr. Etudes Andines. 1995, 24 (2): 317-339. www.uptodate.com www.emedicine.com
A 2-yo girl has diarrhea and a temp of 38 ◦ C. Which of the ff would suggest that she has viral, rather than a bacterial, enteritis? A. Stool leukocytes B. Mucus in stools C. Blood in stools D. Vomiting before onset of diarrhea E. Frequent, mildly watery, small- volume stools