Extradigestive Manifestation of Helicobacter Pylori Infection in Children and Adolescents by Philip M Sherman, Frank YH Lin

“…Helicobacter pylori infection fulfills each of Koch's postulates as a human pathogen causing chronic active gastritis. …”
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Antigenic Complementarity in the Origins of Autoimmunity: A General Theory Illustrated With a Case Study of Idiopathic Thrombocytopenia Purpura by Robert Root-Bernstein, Jacob Couturier

“…Finally, we argue that Koch's postulates are inadequate for establishing disease causation for multiple-antigen diseases and discuss the possibility that current research has failed to elucidate the causes of human autoimmune diseases because we are using the wrong criteria.…”
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Morphological and biochemical identification of Ralstonia solanacearum strains in ginger (Zingiber officinale Roscoe) wilt disease by Kezia Natalia, Andree Wijaya Setiawan, Ruth Meike Jayanti

“…The study involved purposive sampling, isolation, and purification of isolates, followed by morphological characterization through observation and biochemical characterization using Gram staining with KOH, oxidase test, arginine activity test, hypersensitivity test, bacterial density calculation, Koch's postulates, and biovar characterization. Three isolates from Banyubiru displayed typical morphological characteristics of RSSC, including round, mucoid colonies with red centers and white edges on TZC medium, and rod-shaped bacterial cells. …”
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Cercosporoid leaf pathogens from whorled milkweed and spineless safflower in California by S.T. Koike, A. Baameur, J.Z. Groenewald, P.W. Crous

“…Pathogenicity is also established for both pathogens based on Koch's postulate.…”
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Tomato rot by Rhizopus microsporus alters native fungal community composition and secondary metabolite production by Mmanoko Napo, Alicia Kock, Kazeem A. Alayande, Michael Sulyok, Michael Sulyok, Chibundu N. Ezekiel, Jessie Uehling, Teresa E. Pawlowska, Rasheed A. Adeleke

“…We assessed the impact of the symbiotic R. microsporus harboring its endosymbiont as well as the fungus cured of it on: (1) the magnitude of spoilage in tomato fruits, as evaluated by Koch's postulate for pathogenicity, (2) the shifts in native communities of endophytic fungi inhabiting these fruits, as examined by ITS rRNA gene metabarcoding and (3) secondary metabolites generated by these communities, as analyzed using multi-analyte LC-MS/MS. …”
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