M. Jong, V. Bach, T. Phan, M. Vo, T. Tran et al., Fatal Avian Influenza A (H5N1) in a Child Presenting with Diarrhea Followed by Coma, New England Journal of Medicine, vol.352, issue.7, pp.686-91, 2005.
DOI : 10.1056/NEJMoa044307

V. Wiwanitkit, Diarrhoea as a presentation of bird flu infection: a summary on its correlation to outcome in Thai cases, Gut, vol.54, issue.10, p.1506, 2005.
DOI : 10.1136/gut.2005.072488

M. Kaji, A. Watanabe, and H. Aizawa, Differences in clinical features between influenza A H1N1, A H3N2, and B in adult patients, Respirology, vol.1, issue.2, pp.231-234, 2003.
DOI : 10.1001/jama.214.3.507

M. Aymard, M. Valette, and J. Luciani, Burden of influenza in children: preliminary data from a pilot survey network on community diseases, The Pediatric Infectious Disease Journal, vol.22, pp.211-215, 2003.
DOI : 10.1097/01.inf.0000092189.42748.cc
URL : https://hal.archives-ouvertes.fr/hal-00122902

S. Meury, S. Zeller, and U. Heininger, Comparison of clinical characteristics of influenza and respiratory syncytial virus infection in hospitalised children and adolescents, European Journal of Pediatrics, vol.163, issue.7, pp.359-63, 2004.
DOI : 10.1007/s00431-004-1445-6

K. Hong, H. Cheong, J. Song, J. Noh, T. Yang et al., Clinical Manifestations of Influenza A and B in Children and Adults at a Tertiary Hospital in Korea during the 2011^|^ndash;2012 Season, Japanese Journal of Infectious Diseases, vol.68, issue.1, pp.20-26, 2015.
DOI : 10.7883/yoken.JJID.2013.466

S. Morris, P. Parkin, M. Science, P. Subbarao, Y. Yau et al., A retrospective cross-sectional study of risk factors and clinical spectrum of children admitted to hospital with pandemic H1N1 influenza as compared to influenza A, BMJ Open, vol.2, issue.2, p.310, 2012.
DOI : 10.1136/bmjopen-2011-000310

A. Gutierrez-pizarraya, P. Perez-romero, R. Alvarez, T. Aydillo, G. Osorio-gomez et al., Unexpected severity of cases of influenza B infection in patients that required hospitalization during the first postpandemic wave, Journal of Infection, vol.65, issue.5, pp.423-453, 2012.
DOI : 10.1016/j.jinf.2012.07.004

S. Wie, B. So, J. Song, H. Cheong, Y. Seo et al., A Comparison of the Clinical and Epidemiological Characteristics of Adult Patients with Laboratory-Confirmed Influenza A or B during the 2011???2012 Influenza Season in Korea: A Multi-Center Study, PLoS ONE, vol.22, issue.5, p.62685, 2013.
DOI : 10.1371/journal.pone.0062685.t005

M. Hawkes, S. Schuh, M. Ipp, A. Bitnun, S. Richardson et al., Natural History of Pandemic H1N1 2009 Influenza Infection in Healthy Pediatric Outpatients, Academic Pediatrics, vol.11, issue.1, pp.66-74, 2011.
DOI : 10.1016/j.acap.2010.12.010

K. To, S. Wong, I. Li, I. Hung, H. Tse et al., Concurrent comparison of epidemiology, clinical presentation and outcome between adult patients suffering from the pandemic influenza A (H1N1) 2009 virus and the seasonal influenza A virus infection, Postgraduate Medical Journal, vol.86, issue.1019, pp.515-536, 2010.
DOI : 10.1136/pgmj.2009.096206

D. Tran, W. Vaudry, D. Moore, J. Bettinger, S. Halperin et al., Comparison of Children Hospitalized With Seasonal Versus Pandemic Influenza A, 2004-2009, PEDIATRICS, vol.130, issue.3, pp.397-406, 2004.
DOI : 10.1542/peds.2011-3216

K. Ogah, N. Munjuluri, and R. Hartis, Swine flu mimicking acute abdomen in pregnancy, Journal of Obstetrics and Gynaecology, vol.84, issue.5, p.443, 2011.
DOI : 10.3109/01443615.2011.567341

A. Adalja, Hematemesis in a 2009 H1N1 influenza patient, The American Journal of Emergency Medicine, vol.28, issue.7, pp.846-843, 2010.
DOI : 10.1016/j.ajem.2009.12.012

N. Bhat, J. Wright, K. Broder, E. Murray, M. Greenberg et al., Influenza-Associated Deaths among Children in the United States, 2003???2004, New England Journal of Medicine, vol.353, issue.24, pp.2559-67, 2003.
DOI : 10.1056/NEJMoa051721

A. Kerr, J. Mcquillin, M. Downham, and P. Gardner, Gastric'flu influenza B causing abdominal symptons in children, Lancet, vol.1, pp.291-296, 1975.

K. Landi and A. Coleman, Sudden Death in Toddlers Caused By Influenza B Infection: A Report of Two Cases and a Review of the Literature, Journal of Forensic Sciences, vol.72, issue.1, pp.213-218, 2008.
DOI : 10.1002/jmv.1045.abs

K. Vivar and T. Uyeki, Influenza virus infection mimicking an acute abdomen in a female adolescent, Influenza and Other Respiratory Viruses, vol.76, issue.2, pp.140-141, 2014.
DOI : 10.1111/irv.12222

S. Wootton, D. Scheifele, A. Mak, M. Petric, and D. Skowronski, Detection of Human Influenza Virus in the Stool of Children, The Pediatric Infectious Disease Journal, vol.25, issue.12, pp.1194-1199, 2006.
DOI : 10.1097/01.inf.0000245097.95543.11

D. Tamura, M. Fujino, M. Ozawa, K. Iwatsuki-horimoto, H. Goto et al., Significance of Seasonal Influenza Viruses in the Stool of Pediatric Patients, The Pediatric Infectious Disease Journal, vol.29, issue.6, pp.578-587, 2010.
DOI : 10.1097/INF.0b013e3181dab225

S. Wootton, E. Aguilera, A. Wanger, A. Jewell, K. Patel et al., Detection of NH1N1 Influenza Virus in Nonrespiratory Sites Among Children, The Pediatric Infectious Disease Journal, vol.33, issue.1, pp.95-101, 2014.
DOI : 10.1097/INF.0b013e3182a09de7

C. Dilantika, E. Sedyaningsih, M. Kasper, M. Agtini, E. Listiyaningsih et al., Influenza virus infection among pediatric patients reporting diarrhea and influenza-like illness, BMC Infectious Diseases, vol.360, issue.1, p.3, 2010.
DOI : 10.1056/NEJMoa0903812

M. Chan, N. Lee, P. Chan, K. To, R. Wong et al., Seasonal Influenza A Virus in Feces of Hospitalized Adults, Emerging Infectious Diseases, vol.17, issue.11, pp.2038-2080, 2011.
DOI : 10.3201/eid1711.110205

S. Yoo, S. Moon, E. Kuak, H. Yoo, C. Kim et al., Frequent Detection of Pandemic (H1N1) 2009 Virus in Stools of Hospitalized Patients, Journal of Clinical Microbiology, vol.48, issue.6, pp.2314-2319, 2010.
DOI : 10.1128/JCM.00325-10

K. To, K. Chan, I. Li, T. Tsang, H. Tse et al., Viral load in patients infected with pandemic H1N1 2009 influenza A virus, Journal of Medical Virology, vol.20, issue.1, pp.1-7, 2010.
DOI : 10.1002/jmv.21664

A. Suryaprasad, O. Morgan, P. Peebles, A. Warner, T. Kerin et al., Virus Detection and Duration of Illness Among Patients With 2009 Pandemic Influenza A (H1N1) Virus Infection in Texas, Clinical Infectious Diseases, vol.52, issue.Supplement 1, pp.109-124, 2011.
DOI : 10.1093/cid/ciq014

M. Chan, N. Lee, P. Chan, T. Leung, and J. Sung, Fecal detection of influenza A virus in patients with concurrent respiratory and gastrointestinal symptoms, Journal of Clinical Virology, vol.45, issue.3, pp.208-219, 2009.
DOI : 10.1016/j.jcv.2009.06.011

J. Higgins, S. Thompson, J. Deeks, and D. Altman, Measuring inconsistency in meta-analyses, BMJ, vol.327, issue.7414, pp.557-60, 2003.
DOI : 10.1136/bmj.327.7414.557

K. Armstrong, D. Fraser, and J. Faoagali, Gastrointestinal bleeding with influenza virus, Med J Aust, vol.154, pp.180-182, 1991.

C. Hsueh, H. Yu, H. Chen, and C. Wu, Influenza-Related Postinfectious Encephalomyelitis Complicated by a Perforated??Peptic Ulcer, Pediatrics & Neonatology, vol.54, issue.4, pp.281-285, 2013.
DOI : 10.1016/j.pedneo.2013.01.005

B. Cunha, F. Pherez, and N. Durie, Swine influenza (H1N1) and acute appendicitis, Heart & Lung: The Journal of Acute and Critical Care, vol.39, issue.6, pp.544-550, 2010.
DOI : 10.1016/j.hrtlng.2010.04.004

C. Plataras, S. Tsangouri, D. Bourikas, and E. Christianakis, Acute appendicitis in a child with swine influenza (H1N1) BMJ Case Rep, pp.10-1136, 2015.

S. Okayama, S. Arakawa, K. Ogawa, and T. Makino, A case of hemorrhagic colitis after influenza A??infection, Journal of Microbiology, Immunology and Infection, vol.44, issue.6, pp.480-483, 2011.
DOI : 10.1016/j.jmii.2011.04.003

M. Matsushita, H. Nishihara, R. Nishiyama, and Y. Kobayashi, Acute hemorrhagic colitis associated with oral administration of oseltamivir for the treatment of influenza A, Journal of Infection and Chemotherapy, vol.13, issue.4, pp.267-276, 2007.
DOI : 10.1007/s10156-007-0527-6

C. Arena, J. Amoros, V. Vaillant, K. Balay, R. Chikhi-brachet et al., Simultaneous investigation of influenza and enteric viruses in the stools of adult patients consulting in general practice for acute diarrhea, Virology Journal, vol.9, issue.1, p.116, 2012.
DOI : 10.1128/JCM.00599-11
URL : https://hal.archives-ouvertes.fr/inserm-00739486

S. Sato, K. Kawasaki, and S. Ohnishi, Hemolytic activity of influenza virus hemagglutinin glycoproteins activated in mildly acidic environments., Proceedings of the National Academy of Sciences, vol.80, issue.11, pp.3153-3160, 1983.
DOI : 10.1073/pnas.80.11.3153

B. Pinsky, S. Mix, J. Rowe, S. Ikemoto, and E. Baron, Long-term Shedding of Influenza A Virus in Stool of Immunocompromised Child, Emerging Infectious Diseases, vol.16, issue.7, pp.1165-1172, 2010.
DOI : 10.3201/eid1607.091248

Y. Hayase and K. Tobita, Detection of genes of RNA viruses from freshly biopsied gastric mucosa by reverse transcription polymerase chain reaction, Journal of Gastroenterology, vol.33, issue.2, pp.147-52, 1998.
DOI : 10.1007/s005350050062

Z. Kocer, J. Obenauer, H. Zaraket, J. Zhang, J. Rehg et al., Fecal Influenza in Mammals: Selection of Novel Variants, Journal of Virology, vol.87, issue.21, pp.11476-86, 2013.
DOI : 10.1128/JVI.01544-13

C. Mair, K. Ludwig, A. Herrmann, and C. Sieben, Receptor binding and pH stability ??? How influenza A virus hemagglutinin affects host-specific virus infection, Biochimica et Biophysica Acta (BBA) - Biomembranes, vol.1838, issue.4, pp.1153-68, 1838.
DOI : 10.1016/j.bbamem.2013.10.004

M. Chan, N. Lee, P. Chan, K. To, R. Wong et al., Intestinal binding of seasonal influenza A viruses to DC-SIGN(+) CD68(+) cells. Influenza Other Respir Viruses, pp.228-258, 2013.

A. Stagg, A. Hart, S. Knight, and M. Kamm, The dendritic cell: its role in intestinal inflammation and relationship with gut bacteria, Gut, vol.52, issue.10, pp.1522-1531, 2003.
DOI : 10.1136/gut.52.10.1522

D. Van-riel, V. Munster, E. De-wit, G. Rimmelzwaan, R. Fouchier et al., Human and Avian Influenza Viruses Target Different Cells in the Lower Respiratory Tract of Humans and Other Mammals, The American Journal of Pathology, vol.171, issue.4, pp.1215-1238, 2007.
DOI : 10.2353/ajpath.2007.070248

J. Peiris, C. Cheung, C. Leung, and J. Nicholls, Innate immune responses to influenza A H5N1: friend or foe?, Trends in Immunology, vol.30, issue.12, pp.574-84, 2009.
DOI : 10.1016/j.it.2009.09.004
URL : https://hal.archives-ouvertes.fr/pasteur-00588917

V. Munster, E. De-wit, J. Van-den-brand, S. Herfst, E. Schrauwen et al., Pathogenesis and Transmission of Swine-Origin 2009 A(H1N1) Influenza Virus in Ferrets, Science, vol.325, pp.481-484, 2009.
DOI : 10.1126/science.1177127

D. Kwon, K. Shin, S. Kim, Y. Ha, J. Choi et al., Replication and pathogenesis of the pandemic (H1N1) 2009 influenza virus in mammalian models, The Journal of Microbiology, vol.76, issue.2, pp.657-62, 2010.
DOI : 10.1007/s12275-010-0120-z

Y. Shu, C. Li, Z. Li, R. Gao, Q. Liang et al., Avian Influenza A(H5N1) Viruses Can Directly Infect and Replicate in Human Gut Tissues, The Journal of Infectious Diseases, vol.201, issue.8, pp.1173-1180, 2010.
DOI : 10.1086/651457

O. Zhirnov and H. Klenk, Human influenza A viruses are proteolytically activated and do not induce apoptosis in CACO-2 cells, Virology, vol.313, issue.1, pp.198-212, 2003.
DOI : 10.1016/S0042-6822(03)00264-2

I. Li, K. Chan, K. To, S. Wong, P. Ho et al., Differential susceptibility of different cell lines to swine-origin influenza A H1N1, seasonal human influenza A H1N1, and avian influenza A H5N1 viruses, Journal of Clinical Virology, vol.46, issue.4, pp.325-355, 2009.
DOI : 10.1016/j.jcv.2009.09.013

C. Chiapponi, I. Zanni, C. Garbarino, G. Barigazzi, and E. Foni, Comparison of the usefulness of the CACO-2 cell line with standard substrates for isolation of swine influenza A viruses, Journal of Virological Methods, vol.163, issue.1, pp.162-167, 2010.
DOI : 10.1016/j.jviromet.2009.09.017

S. Yamada, Y. Suzuki, T. Suzuki, M. Le, C. Nidom et al., Haemagglutinin mutations responsible for the binding of H5N1 influenza A viruses to human-type receptors, Nature, vol.54, issue.7117, pp.378-82, 2006.
DOI : 10.1038/nature05264

H. Zeng, C. Pappas, J. Katz, and T. Tumpey, The 2009 Pandemic H1N1 and Triple-Reassortant Swine H1N1 Influenza Viruses Replicate Efficiently but Elicit an Attenuated Inflammatory Response in Polarized Human Bronchial Epithelial Cells, Journal of Virology, vol.85, issue.2, pp.686-96, 2011.
DOI : 10.1128/JVI.01568-10

B. Qu, X. Li, W. Gao, W. Sun, J. Y. Cardona et al., Human intestinal epithelial cells are susceptible to influenza virus subtype H9N2, Virus Research, vol.163, issue.1, pp.151-160, 2012.
DOI : 10.1016/j.virusres.2011.09.007

T. Maines, A. Jayaraman, J. Belser, D. Wadford, C. Pappas et al., Transmission and Pathogenesis of Swine-Origin 2009 A(H1N1) Influenza Viruses in Ferrets and Mice, Science, vol.325, pp.484-491, 2009.
DOI : 10.1126/science.1177238

J. Wang, F. Li, H. Wei, Z. Lian, R. Sun et al., Respiratory influenza virus infection induces intestinal immune injury via microbiota-mediated Th17 cell???dependent inflammation, The Journal of Experimental Medicine, vol.211, issue.13, p.2683, 2014.
DOI : 10.1084/jem.2014062511242014c
URL : http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4267245

M. Aleandri, M. Conte, G. Simonetti, S. Panella, I. Celestino et al., Influenza A Virus Infection of Intestinal Epithelial Cells Enhances the Adhesion Ability of Crohn???s Disease Associated Escherichia coli Strains, PLOS ONE, vol.110, issue.2, p.117005, 2015.
DOI : 10.1371/journal.pone.0117005.t001

P. Gaur, P. Ranjan, S. Sharma, J. Patel, J. Bowzard et al., Influenza A Virus Neuraminidase Protein Enhances Cell Survival through Interaction with Carcinoembryonic Antigen-related Cell Adhesion Molecule 6 (CEACAM6) Protein, Journal of Biological Chemistry, vol.287, issue.18, pp.15109-15126, 2012.
DOI : 10.1074/jbc.M111.328070