First Report on the Emergence of <i>Neopestalotiopsis rosae</i> as a Severe Economic Threat to Strawberry Production in Germany by Tom E. Schierling, Ralf T. Voegele, Abbas El-Hasan

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Identification and Koch Postsulate Test of Fungal Causative Disease in Gouramy Fish by Sri Nuryati, F.B.P. Sari, . Taukhid

“…Saprolegnia was identified in infected egg whereas Aphanomyces sp. was identified in the internal part (underneath lesion) of gouramy fish. Postulate Koch tests was further confirmed that both species could infect gouramy fish.     …”
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THE FIRST REPORT OF PESTALOTIOPSIS SP. CAUSING CROWN ROT DISEASE ON STRAWBERRIES IN DALAT by Lê Dũng, Nguyễn Thị Diên, Phan Hoàng Đại, Phạm Ngọc Tuân

“…Most fungi isolated from infected parts were identified as Botrytis cinerea, Verticillium sp., Cylindrocarpon destructans, Fusarium oxysporum, Rhizoctonia sp. and Pestalotiopsis sp., in which the main fungi consistently isolated were Pestalotiopsis sp.. By fulfilling Koch’s postulates, the results of pathogenesis test indicated that Pestalotiopsis sp. was a pathogen causing the crown rot disease on strawberries in Dalat. …”
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Characterization of pathogenic bacteria in eel Anguilla bicolor bicolor by Dinamella Wahjuningrum, Acep Muhamad Hidayat, Tatag Budiardi

“…The results showed three dominant species of bacteria suspected as a causative agent in eel, namely: Aeromonas hydrophila, Streptococcus agalactiae, and Listeria grayi. Koch’s postulates test proved that the Aeromonas hydrophila and Streptococcus agalactiae were virulent to Anguilla bicolor bicolor.  …”
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Identification and management of a novel Danshen leaf anthracnose caused by Colletotrichum karstii in Salvia miltiorrhiza Bunge in China by Haoyue Ma, Haoyue Ma, Liguo Huang, Lulu Guo, Lulu Guo, Shan Chen, Jiale Liu, Changyun Liu, Yanxia Dou, Xianchao Sun, Lin He, Guanhua Ma

“…Combining molecular biology techniques with morphological observation and Koch’s postulates, the pathogen was conclusively identified as Colletotrichum karstii. …”
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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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First report of wilt disease in cashew (Anacardium occidentale L.) caused by Fusarium decemcellulare in Kerala, India by A. V. Meera Manjusha, P. K. Laya, Amal Premachandran, M. Veena

“…Pathogenicity of the isolate was confirmed in cashew seedlings, thereby demonstrating Koch’s postulates. Conclusion To our knowledge, this is the first record of wilt disease of cashew caused by F. decemcellulare in India. …”
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Diversity of Rust Fungi with Special Emphasis on <i>Hyalopsora erlangensis</i> Causing Disease in <i>Cystopteris chinensis</i> by An Yu, Xia Zhao, Xiaohong Chen

“…Artificial inoculation experiments, which involved sampling uredia from the field, were conducted to fulfill Koch’s postulates. Our results designate this rust fungus as a novel species within the Pucciniastraceae family, named <i>Hyalopsora erlangensis</i> A. …”
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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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Occurrence of Spot Blotch in Spring Barley Caused by Bipolaris sorokiniana Shoem. in South-Eastern Kazakhstan by Yerlan Dutbayev, Nurlan Kuldybayev, Saule Daugaliyeva, Elvira Ismailova, Nadira Sultanova, Göksel Özer, Ayana Slyamova, Kadyrzhan Mukin, Abdelfattah Dababat, Minura Yessimbekova

“…Inoculated seedlings showed clear symptoms of B. sorokiniana, and therefore, Koch’s postulates were fulfilled by reisolating the pathogen from artificially inoculated seedlings and identifying it based on standard morphology criteria. …”
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<i>Trachemys scripta</i> Eggs as Part of a Potential In Vivo Model for Studying Sea Turtle Egg Fusariosis by María Martínez-Ríos, Laura Martín-Torrijos, Javier Diéguez-Uribeondo

“…We found that the pathogen could colonize and develop similar signs to those observed in nature and fulfill Koch’s postulates. The pathogen showed high virulence properties (e.g., high disease incidence, severity, and low hatching success) and its ability to modify the pH in both the egg surface and culture media, confirming previously described fungal pathogen models. …”
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Identification and management of Bipolaris sorokiniana in wheat and barley in Southeast Kazakhstan by A. Kharipzhanova, Y. Dutbayev, G. Erginbas-Orakci, A. A. Dababat, Ş. G. Korkulu, S. Aydın, T. Paulitz, G. Özer, T. Bozoğlu, S. Zholdoshbekova, N. Sultanova, A. Kokhmetova

“…Molecular analysis of B. sorokiniana isolates via species-specific primers (COSA_F/COSA_R) from infected plant tissues confirmed their identification. Koch postulates were fulfilled for B. sorokiniana isolates Kz 48, 60, and 82 on Steklovidnaya 24 winter wheat and Symbat spring barley varieties. …”
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Alternaria radicina; unveiling the cause, spread, and molecular basis of a novel coriander leaf blight disease in Egypt by Khalid M. Ghoneem, Ehsan M. Rashad, Abdulaziz A. Al-Askar, Yosra A. Helmy, Seham M.A. El-Gamal, Shafik D. Ibrahim, WesamEldin I.A. Saber

“…Further confirmation was obtained by analyzing target sequences for the Alt-a-1 gene (GenBank OR492259). Koch's postulates were strictly adhered to, leading to the successful re-isolation of A. radicina from artificially infected 8-week-old coriander plants (local variety; Balady), providing unequivocal evidence that the fungus is responsible for leaf blight disease, marking the first such confirmation worldwide. …”
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Vibrio alginolyticus is the pathogen of “Baotou” disease causing serious damage to Gracilariopsis lemaneiformis cultivation in China by Tong Pang, Feng Wang, Qunqun Guo, Mengjie Zhang, Yuanyuan Sun, Jianguo Liu

“…V. alginolyticus could cause the rotten symptoms which were consistent with those of “Baotou” disease. According to Koch’s postulates, V. alginolyticus was identified as the pathogen causing “Baotou” disease.IMPORTANCEA highly contagious disease known as “Baotou” disease has persistently triggered significant yield reductions in G. lemaneiformis throughout China. …”
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Report on emerging foliar soft rot disease on ginseng Panax vietnamensis and the identification of Neocosmospora ipomoeae and Fusarium miscanthi as the causal pathogens by Hau T. Duong, Duong T. Pham, Van T. Pham, Anh H. Le, Toi D. Nguyen, Nam X. Nguyen, Chung T. Khuat, Hang T. Dinh

“…Among 79 fungal strains isolated from infected leaves, two strains NL5 and KT2.1.2 were identified as true pathogens causing foliar soft rot disease according to the results of pathogenicity tests (following Koch’s postulates), which confirmed a disease index of 12% for both strains. …”
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Isolation and identification of the causal agent of gummy stem blight disease in Cucumis sativus caused by a bacterial pathogen in China by Yidan Wang, Mengjun Jin, Chengde Yang, Fengfeng Cai, Richard Osei, Ting Ma, Cuiwen Zhang, Na Qi

“…Pathogenicity analysis showed that HlJ-3 caused melting decay and cracking in cucumber stems, and the strain reisolated from re-infected cucumber stalks was morphologically identical to HlJ-3 colonies, which is consistent with the Koch’s postulates. The pathogenic strain HlJ-3 was identified as having similar morphological characteristics to Bacillus subtilis. …”
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Polydomus karssenii gen. nov. sp. nov. is a dark septate endophyte with a bifunctional lifestyle parasitising eggs of plant parasitic cyst nematodes (Heterodera spp.) by Samad Ashrafi, Jan-Peer Wennrich, Yvonne Becker, Jose G. Maciá-Vicente, Anke Brißke-Rode, Matthias Daub, Torsten Thünen, Abdelfattah A. Dababat, Maria R. Finckh, Marc Stadler, Wolfgang Maier

“…The pathogenicity tests against nematode eggs fulfilled Koch’s postulates using in vitro nematode bioassays and showed that the fungus could parasitise its original nematode host H. filipjevi as well as the sugar beet cyst nematode H. schachtii, and colonise cysts and eggs of its hosts by forming highly melanised moniliform hyphae. …”
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Bacterial interactions underpin worsening lung function in cystic fibrosis-associated infections by Damian W. Rivett, Lauren R. Hatfield, Helen Gavillet, Michelle Hardman, Christopher van der Gast

“…Moreover, it can also be used to support the design and construction of clinically relevant in vitro models of polymicrobial infections.IMPORTANCEResearch studies have repeatedly demonstrated that chronic lung infection in cystic fibrosis is polymicrobial and consequently does not adhere to the single microbe-based Koch’s postulates. Despite the plethora of evidence, the role of the constituent taxa present is largely unknown. …”
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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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