Obesity Surgery

, Volume 18, Issue 1, pp 139–143 | Cite as

Intestinal Bacterial Overgrowth After Roux-en-Y Gastric Bypass

  • Juliana Deh Carvalho MachadoEmail author
  • Camila Scalassara Campos
  • Carolina Lopes Dah Silva
  • Vivian Miguel Marques Suen
  • Carla Barbosa Nonino-Borges
  • José Ernesto Dos Santos
  • Reginaldo Ceneviva
  • Júlio Sérgio Marchini
Case Report


The aim of the present study was to report the occurrence of serious subnutrition, associated to intestinal bacterial overgrowth, in two patients submitted to bariatric surgery. Two female patients (body mass index, 49 and 50 kg/m2, respectively) were submitted to Y-en-Roux gastric bypass. The first patient evolved a 52% loss of body weight within 21 months after surgery; the other, a 34% loss of initial body weight within 15 months after surgery, results corresponding, respectively, to 62 and 45 kg weight losses. However, both patients reported asthenia, hair fallout, and edema, and one also reported diarrhea, but none was feverish. Their respective albuminemias were of 24 and 23 g/l. A respiratory hydrogen test suggested bacterial hyperproliferation. Thirty days after ciprofloxacin and tetracyclin treatments, they showed improved albumin levels and nutritional states, both confirmed by results of hydrogen breath tests. Bacterial overgrowth is an important complication that can compromise clinical evolution of patients submitted to intestinal surgery like gastroplasty with Y-Roux anastomosis. In cases of clinical suspicion or a confirmed diagnosis, adequate antibiotics, sometimes requiring to be cyclically repeated, should be administered.


Poor absorption Bacterial overgrowth Bariatric surgery 


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Copyright information

© Springer Science + Business Media B.V. 2007

Authors and Affiliations

  • Juliana Deh Carvalho Machado
    • 1
    • 4
    Email author
  • Camila Scalassara Campos
    • 1
  • Carolina Lopes Dah Silva
    • 1
  • Vivian Miguel Marques Suen
    • 2
  • Carla Barbosa Nonino-Borges
    • 2
  • José Ernesto Dos Santos
    • 2
  • Reginaldo Ceneviva
    • 3
  • Júlio Sérgio Marchini
    • 2
  1. 1.Department of Internal MedicineHospital of the School of Medicine of Ribeirão PretoRibeirão PretoBrazil
  2. 2.Clinical Nutrition Division, Department of Clinical MedicineHospital of the School of Medicine of Ribeirão PretoRibeirão PretoBrazil
  3. 3.Department of SurgeryHospital of the School of Medicine of Ribeirão PretoRibeirão PretoBrazil
  4. 4.Departamento de Clínica MédicaHospital das Clínicas da Faculdade de Medicina de Ribeirão Preto da Universidade de São PauloRibeirão PretoBrazil

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