Gastrointestinal infections Prof. MUDr. Petr Husa, CSc. Klinika infekčních chorob LF MU a FN Brno MCj04107470000[1] Global significance of GI infections •Estimates are that over 1.8 million children still die each year ( more than 6000/day) •The second most common infections in developed countries (after respiratory infections) j0286672 Gastrointestinal infections in CR 2006-2012 j0178242 Gastrointestinal infections •bacterial • •viral • •parasitic Bacterial GI infections •transmission of pathogenic microbs • - zoonosis • - human • •food-poisoning (toxins in food) Zoonosis •salmonellosis (S. Enteritidis) • •campylobacteriosis (C. jejuni) • •yersiniosis (Y. enterocolitica) • •EHEC (E. coli) Campylobacteriosis •now the most common zoonosis in CR a many other European countries (especially undercooked poultry) •Campylobacter jejuni •clinical course – from inaparent to serious acute enterocolitis with right lower abdominal quadrant pain, fever, and bloody diarrhoea •sepsis is possible in IS patients •reactive arthritis, erythema nodosum – possible immune-mediated complications •rehydration, diet, complicated forms: macrolides • Campylobacteriosis in Southern Moravia C:\Users\33550\Pictures\Image Library One\My Images\Lékařské\Amébovýabsces jater\bakteriální abscesy jater\P1010005.JPG C:\Users\33550\Pictures\Image Library One\My Images\Lékařské\Amébovýabsces jater\bakteriální abscesy jater\P1010001.JPG Salmonellosis •the second most common zoonosis in CR and most European countries •at present in CR minimally 90 % cases caused by S. Enteritis, rarely S. Typhimurium •gastroenteritidis •enterotoxin production and active penetration into intestinal epithel •septic form (extraintestinal abscesses) in IS patients •reactive arthritis, erythema nodosum – possible immune-mediated complications •rehydration, diet, complicated forms: fluoroquinolones, co-trimoxazol, ampicilin, chloramphenicol Salmonellosis in Southern Moravia Yersiniosis •worldwide zoonosis, relatively more common in Nothern Europe •Yersinia enterocolitica •more often in winter •fever, diarrhea, often bloody, syndrome of the lower right quadrant (mesenterial lymphadenitis) •complication: sepsis, metastatic abscesses (esp. liver) •reactive arthritis, erytema nodosum - possible immune-mediated complications •rehydration, diet, complicated forms: fluoroquinolones, co-trimoxazol, ampicilin, chloramphenicol • • Human bacterial infections •cholera •shigellossis •E.coli enterocolitis (except for EHES – zoonosis) •Clostridium difficile infection • Cholera •endemic in South and South-East India •Vibrio cholerae faecally contaminated water – drinking water, undercooked animals from this water •boiling destroys this bacteria •at least 7 cholera pandemics worldwide during last 200 years •1st-6th pandemics - classic type (1817-1923) •7th pandemic - biotyp El Tor (since 1960s) •8th pandemic - O139 Bengal (since 1992) cholera mapka Cholera – 7th and 8th pandemics cholera Ganga Cholera •enterotoxin production - profuse diarrhea, vomiting and rapid dehydration (especially when is the infection caused by classic type) •the collection of stool by special swabs and culture •the necessity of quick rehydration •antibiotics – above all epidemiological significance (fluroquinolones, co-trimoxazol, doxicycline, chloramphenicol) •vaccination available (combinated vaccine with ETEC), not generally recommended – low efficacy, short duration of protection cholera scan cholera stolice cholerové lůžko cholera dehydratace Shigellosis •one of the most contagious intestinal infections •associated with poor hygiene conditions – war conflicts, natural catastrophes •Shigella sonnei, S. flexneri •colitis (tenesmus, often mucus, pus, and blood in stool) •rehydration, diet, complicated forms: fluoroquinolones, co-trimoxazol, ampicilin, chloramphenicol • E. coli enterocolitis •Enterotoxigenic - ETEC •Enteroinvasive - EIEC •Enteropathogenic - EPEC •Enterohemorrhagic - EHEC •Enteroagregative - EAEC •Difuse adherent Clostridium difficile infection (CDI) •C. difficile - G+ anaerobic spore-forming bacteria •spores survive for many months outside an organism – extremely resistant •common nosocomial infections in developed countries •development of vegetative forms in the colon •production of exotoxins (usually both at once) •- toxin A (enterotoxin – nekrotic) •- toxin B (cytotoxin) •- binary toxin (unknown mechanism) c Important factors for CDI •presence of toxigenic strain of C.difficile •antibiotic treatment – aminopenicilins, cephalosporins, lincosamides… •less frequently without antibiotic treatment – oncologic patients •age ≥ 65 years, comorbities, IS •function of GI tract – peristalsis, only perenteral nutrition, disturbances of mucous immunity CDI – clinical forms •a) asymptomatic carriers (2-3 % of adults, in children much more, prevalence is increasing with the length of hospitalization - 10-25 % or more) •b) uncomplicated colitis (diarrhea, fever, no pseudomembranes) •c) pseudomembranous colitis - PMC (sepsis, leucocytosis, abdominal pain, and bloody stool) •d) toxic megacolon (paresis and necrosis of the gut, possible perforation, infectious shock) C:\Users\33550\Pictures\Image Library One\My Images\Lékařské\Clostridium difficile\rektum.JPG C:\Users\33550\Pictures\Image Library One\My Images\Lékařské\Clostridium difficile\P1010006.JPG Diagnosis of CDI •antibiotics in history •clinical findings •microbiological testing – detection of toxins (ELISA), specific antigen (GDH), culture, cytotoxic test, PCR •coloscopy (pseudomembranes) •ultrasound, CT – auxilliary methods fig 3 CDI therapy •termination of ATB therapy •colitic diet, rehydration, rehabilitation •do not use antimotility drugs - danger of toxic megacolon •pharmacotherapy – 10-14 days Ømetronidazol 3 × 500 mg oral or intravenous Øvancomycin 4 × 125 mg oral Øfidaxomicin 2 × 200 mg oral •colectomy • • • Food poisining •with short incubation period (1-6 hours)-termostabile toxins – nausea, vomiting •Staphylococcus aureus •Bacillus cereus •with long incubation period (6-18 hours)- termolabile toxins - diarrhea •Bacillus cereus •Clostridium perfringens A •absence of fever, outbreaks •rehydration, diet Viral gastroenteritis •noroviruses (Norwalk, Norwalk-like virus) – older children, adults •rotaviruses (small children- 6-24 months, seniors) – fecal-oral, air-borne infection, vaccine available •adenoviruses •astroviruses •coronaviruses • •symptomatic therapy Viral GI infections in Southern Moravia C:\Users\33550\Pictures\norovirus.jpg Norovirus Incubation periods of GI infections Parasitic infection of GI tract •protozoal •helmintic •fungal Protozoal infections •Human •Amebiasis (Entamoeba histolytica) •Lambliasis = girardiasis (L., G. intestinalis) •Zoonotic •cryptosporidiosis (Cryptosporidium parvum) •isosporosis (Isospora belli) •microsporidiosis (Enterocytozoon bineusi) •cyclosporosis (Cyclospora cayetanensis) • Amebiasis_LifeCycle Amebiasis Entamoeba histolytica améba - střevo Amebic colitis absces pred drenazi CT – day 0 Amebic abscess absces drenaz CT – drainage of 2 abscesses – day 2 Amebic abscess absces uvodni UZ US – day 0 absces posledni UZ US – day 5 břicho 1 pytlík zkumavka 3 amépa punkce abscesu Amebic abscess – trancutaneus punction Giardia_LifeCycle Lambliasis, girardiasis Lamblia, Giardia intestinalis lamblie mikro Lambliasis microskopy lamblie scan Lambliasis scan Helmintic GI infections •Roundworms (Nematodes) - ascariosis, enterobiosis=oxyuriosis, trichuriosis •Tapeworms (Cestodes) - teniosis, diphylobotriosis, hymenolepsiosis, echinococcosis, alveococcosis •Flukes (Trematodes) - schistosomosis Roundworms (Nematodes) •Ascaris lumbricoides •Enterobius, Oxyuris vermicularis •Trichuris trichiura • geohelmintózy Ascariasis_LifeCycle Ascariosis Ascaris lumbricoides škrkavka škrkavky ze zadku škrkavka žlučovod škrvka ileus Trichuris_LifeCycle Trichuriosis Trichuris trichiura trichuris trichuris prolaps rekta Enterobius_LifeCycle Enterobiosis, oxyuriosis Enterobius, Oxyuris vermicularis roupy vyšetření Enterobiosis, oxyuriosis Tapeworms (Cestodes) •Man as final host •Taenia saginata •Taenia solium •Diphyllobotrium latum , D. pacificum •Hymenolepsis nana • •Animal as final host •Echinococcus granulosus •Echinococcus (Alveococcus) multilocularis • • • Taenia_LifeCycle Taeniosis Taenia saginata Taenia solium Cysticercosis_LifeCycle Cysticercosis Taenia solium hlavičky tasemnic Taenia solium Taenia saginata taenia saginata červ Taenia solium taenia saginata červ2 Taenia saginata cysticerkóza u prasete Cysticercosis (pig) cysticerkóza člověk Cysticercosis (man) cysticerkóza kráva Cysticercosis (cow) D_latum_LifeCycle Diphyllobotriosis Diphylobotrius latus, pacificus H_nana_LifeCycle Hymenolepsiosis Hymenolepsis nana Echinococcus_LifeCycle Echinococcosis E. granulosus echinokok červ Echinococcus granulosus (dog) echinokok CT Echinococcus granulosus – liver cysts (man) echinokok cysta Echinococcus granulosus – liver cysts (man) Flukes (Trematodes) •schistosomiasis (bilharsiasis) üS. hematobium üS. intestinalis (mansoni) üS. japonicum üS. mekongi • Schistomes_LifeCycle Schistosomosis, bilharziosis schistosoma šneci schistosoma hovno u řeky schistosoma koupání Katayama fever schistosoma ascites schistosoma kalcifikace Fungal GI infections •about all candidiasis •different members of Candida sp. (mostly C.albicans) •mounth cavity, oesophagus, anorectal •mostly IS patients •fluconazol, itraconazol, ketoconazol, amphotericin B husa-tenisky Thank you for your attention! phusa@fnbrno.cz