Discover Our Publications

At Helmy Lab, we are dedicated to advancing science through impactful research. Our publications showcase innovative discoveries and translational work across microbiology, infectious diseases, antimicrobial resistance, and One Health. Whether you’re a student, researcher, or curious reader, we invite you to explore our contributions to science and public health.

2025

  • Kabir , Kelley WG., Glover C., Erol E., and Helmy Y.A. (2025). Phenotypic and genotypic characterization of antimicrobial resistance and virulence profiles of Salmonella enterica serotypes isolated from necropsied horses in Kentucky. Microbiology Spectrum e02501-24. https://doi.org/10.1128/spectrum.02501-24
  • Saleh M., El Moghazy A., El-Gohary A., Wessam Eldin IA., and Helmy Y.A.* (2025). Revolutionizing Nano vaccines: A New Era of Immunization. Vaccines 13 (2), 126. https://doi.org/10.3390/vaccines13020126.
  • Hasnat S., Rahman MM., Yeasmin F., Jubair M., Helmy Y.A., Islam T., and Hoque MN. (2025). Genomic and Computational Analysis Unveils Bacteriocin-Based Therapeutics against Clinical Mastitis Pathogens in Dairy Cows. Probiotics and Antimicrobial Proteins. https://doi.org/10.1007/s12602-025-10563-w.
  • Elattar KM., Ghoniem AA., Al-Otibi FO., Fakhouri AS., Helmy Y.A., Saber WIA., Hassan MAE., and Elsayed A. (2025). Eco-friendly synthesis of Ag/CeO2 and CuO/CeO2 nanocomposites using Curcuma longa extract and assessment of their antioxidant, antifungal, and cytotoxic activities. RSC Advances 15(16):12100-12116. https://doi.org/10.1039/D5RA00739A.
  • Closs, Jr G, Bhandari M, Helmy Y.A., Kathayat D, Lokesh D, Jung K, Suazo I, Srivastava V, Deblais L, Rajashekara G. (2025). The probiotic Lacticaseibacillus rhamnosus GG supplementation reduces Salmonella load and modulates growth, intestinal morphology, gut microbiota, and immune responses in chickens. Infection and Immunity. https://doi.org/10.1128/iai.00420-24.
  • Abou Ayana IA, Al-Otibi FO, Elgarhy MR, Omar MM, EL-Abbassy MZ, Khalifa SA, Helmy Y.A., and Saber WIA (2025). Chemical, Physical, Microbial, and Sensory Properties of Innovative Sesame Milk Kefir, Focusing on the Ultrastructure of Kefir Grains. ACS Omega. https://doi.org/10.1021/acsomega.4c08044.

2024

  • Helmy Y.A., Kabir A, Salah M, Kennedy LA, Burns L, and Johnson B (2024). Draft Genome Sequence Analysis of Multidrug-Resistant Salmonella enterica subsp. enterica serovar Mbandaka Harboring Colistin Resistance Gene mcr-9.1 Isolated from Foals in Kentucky, USA. Microbiology Resource Announcements 7:e0073724. PMID: 39373480; https://doi.org/10.1128/mra.00737-24.  
  • Kabir A, Lamichhane B, Habib T, Adams A, El-Sheikh Ali H, Slovis NM, Troedsson MHT, Helmy Y.A. (2024). Antimicrobial Resistance in Equines: A Growing Threat to Horse Health and Beyond- A Comprehensive Review. Antibiotics 13(8), 713. PMID: 39200013; PMCID: PMC11350719; https://doi.org/10.3390/antibiotics13080713.
  • Al Farabi A, Hossain H, Brishty KA, Rahman MH, Rahman M, Siddiqui MSI, Atikuzzaman M, Saleh A, Binsuwaidan R, Selim HRM, Noreddin A, Helmy Y.A., Rahman M, Barua H, and El Zowalaty ME (2024). Prevalence, Risk Factors, and Antimicrobial Resistance of Staphylococcus and Streptococcus Species Isolated from Subclinical Bovine Mastitis. Foodborne Pathogens and Disease. PMID: 39479784. https://doi.org/10.1089/fpd.2024.0097.
  • Abo-Neima SE, Elsehly EM, Al-Otibi F., El-Metwally MM, Helmy Y.A., El-Dadamony NM, Saber W, El-Morsi A. (2024). Simplex-lattice design and decision tree optimization of endophytic Trichoderma-multi-walled carbon nanotube composite for enhanced methylene blue removal. Heliyon 10: e39949. https://doi.org/10.1016/j.heliyon.2024.e39949.
  • Refaey MM, Al-Otibi FA, El-Khateeb AY, Helmy Y.A., Zalma S, Saber WI (2024). Enhanced Biochemical, Microbial, and Ultrastructural Attributes of Reduced-Fat Labneh through Innovative Microalgae Integration. Scientific Reports 14: 21188. https://doi.org/10.1038/s41598-024-71190-z.
  • Chowdhury MSR, Rahman MM, Hossain H, Ghosh PK, Islam MR, Lamichhane B., Gomaa FAM, Selim HM, Hossain MM, Helmy Y.A., El Zowalaty ME (2024). Subclinical Mastitis of Buffaloes in Asia: Prevalence, Pathogenesis, Risk Factors, Antimicrobial Resistance, and Current Treatment Strategies. Journal of Animal Science and Technology. https://doi.org/10.5187/jast.2024.e66.
  • Ghoneem KM, Rashad EM, Al-Askar AA, Helmy Y.A., El-Gamal SMA, Ibrahim SD, Saber WIA (2024). Alternaria radicina; unveiling the cause, spread, and molecular basis of a novel coriander leaf blight disease in Egypt. Heliyon 11 (1): e41081. https://doi.org/10.1016/j.heliyon.2024.e41081.
  • Rahman MM, Hossain H, Chowdhury MSR, Hossain MM, Saleh A, Binsuwaidan R, Noreddin A, Helmy Y.A., El Zowalaty ME (2024). Molecular Characterization of Multidrug-Resistance and Extended-Spectrum β-Lactamases-Producing Salmonella enterica serovars Enteritidis and Typhimurium isolated from Raw Meat in Retail Markets. Antibiotics 13(7), 586. PMID: 39061268; PMCID: PMC11274296. https://doi.org/10.3390/antibiotics13070586.
  • Abou Ayana IAA., Elgarhy M., Al-Otibi F., Omar MM., El-Abbassy M., Khalifa S., Helmy Y.A., and Saber WE. (2024). Artificial Intelligence-Powered Optimization and Milk Permeate Upcycling for Innovative Sesame Milk with Enhanced Probiotic Viability and Sensory Appeal. ACS Omega 9 (23): 25189–25202. https://doi.org/10.1021/acsomega.4c02824.
  • Deblais L, Drozd M, Kumar A, Antwi J, Fuchs J, Khupse R, Helmy Y.A., and Rajashekara G (2024). Identification of novel small molecule inhibitors of twin-arginine translocation (Tat) pathway and their effect on the control of Campylobacter jejuni in chickens. Frontiers in Microbiology 15:1342573. PMID: 38694802; PMCID: PMC11061419; https://doi.org/10.3389/fmicb.2024.1342573.
  • Abouelela ME., and Helmy Y.A. (2024). Next-Generation Probiotics as Novel Therapeutics for Improving Human Health: Current Trends and Future Perspectives. Microorganisms 12(3), 430. PMCID: PMC10972033;https://doi.org/10.3390/microorganisms12030430.
  • Lamichhane B, Mawad AMM., Saleh M., Kelley WG, Harrington PJ, Lovestad CW, Amezcua J, Sarhan MM, El Zowalaty ME, Ramadan H, Morgan M, Helmy Y.A. (2024). Salmonellosis: An Overview of Epidemiology, Pathogenesis, and Innovative Approaches to Mitigate Antimicrobial Resistant Infections. Antibiotics 13 (1): 76. PMID: 38247636; PMCID: PMC10812683; https://doi.org/10.3390/antibiotics13010076.
  • El Zowalaty M., Falgenhauer L., Ashour H., Zishiri O., Forsythe S, and Helmy Y.A. (2024). Draft genome sequences of Bacillus licheniformis strains MEZBL63 and MEZBL64 harboring the lichenysin toxin operon isolated from livestock in South Africa. Microbiology Resource Announcements 13(3):e0096723. PMID: 38323846; PMCID: PMC10927698; https://doi.org/10.1128/mra.00967-23.
  • Taha-Abdelaziz K, Helmy Y.A., Yitbarek A., Hodgins D., Sharafeldin T., Selim M. (2024). Advances in Poultry Vaccines: Leveraging Biotechnology for Improving Vaccine Development, Stability and Delivery. Vaccines 12 (2): 134. PMID: 38400118; PMCID: PMC10893217;  https://doi.org/10.3390/vaccines12020134
  • Ghoniem AA., Elattar KM, Al-Otibi FO., Elsayed A., El-Hersh MS, El-Khateeb AY., Helmy Y.A., and Saber WE. (2024). Turmeric extract-mediated biogenic synthesis of Ag@SeO2 magnetic nanoparticles: characterization, optimization, antibacterial and antioxidant activities. RSC Advances, 14 (10):7088-7111. PMID: 38414990; PMCID: PMC10897959; https://doi.org/10.1039/D4RA00004H.
  • Abdel-Latif MA., Abd El-Hamid HS., Emam M., Noreldin AE., Helmy Y.A., El-Far AH and Elbestawy AR. (2024). Dietary lysozyme and avilamycin modulate gut health, immunity, and growth rate in broilers. BMC Veterinary Research 20 (1):28. PMID: 38245745; PMCID: PMC10799510; https://doi.org/10.1186/s12917-023-03871-2.

2023

  • El Zowalaty ME, Lamichhane B., Falgenhauer L., Mowlaboccus S., Zishiri O., Forsythe S., Helmy Y.A.* (2023). Antimicrobial Resistance and Whole Genome Sequencing of Novel Sequence Types of Enterococcus faecalis, Enterococcus faecium, and Enterococcus durans Isolated from Livestock. Scientific Reports 13 (1). PMID: 37903806; PMCID: PMC10616195; https://doi.org/10.1038/s41598-023-42838-z.
  • Bhandari M, Poelstra JW, Kauffman M., Varghese B, Helmy Y.A., Scaria J, and Rajashekara G. (2023). Genomic Diversity, Antimicrobial Resistance, Plasmidome, and Virulence Profiles of SalmonellaIsolated from Small Specialty Crop Farms Revealed by Whole-Genome Sequencing. Antibiotics 12 (11):1637. PMID: 37998839; PMCID: PMC10668983; https://doi.org/10.3390/antibiotics12111637.
  • El-Metwally MM, Abdel-Fattahb GM, Al-Otibi FO, Khatieb DK, Helmy Y.A., Youssef M.M. Mohammed, Saber WI (2023). Application of artificial neural networks for enhancing Aspergillus flavipes lipase synthesis for green biodiesel production. Heliyon 9, e20063. PMID: 37809880; PMCID: PMC10559816; https://doi.org/10.1016/j.heliyon.2023.e20063.
  • Elgarhy MR, Omar MM, Al-Otibi FO, EL-Abbassy MZ, Khalifa SA, Abou Ayana IA, Helmy Y.A., and Saber YA (2023). Biochemical, Microstructural, and Probiotic Bacterial Patterns of Innovative Fresh Cheese Fortified with Helianthus tuberosus Tubers. Processes 11 (10): 2854. https://doi.org/10.3390/pr11102854
  • Fakhry H, Ghoniem AA, Al-Otibi FO, Helmy Y.A., El Hersh MS, Elattar K, Saber WI, and Elsayed A (2023). A Comparative Study of Cr(VI) Sorption by Aureobasidium pullulans AKW Biomass and Its Extracellular Melanin: Complementary Modeling with Equilibrium Isotherms, Kinetic Studies, and Decision Tree Modeling. Polymers, 15, 3754. https://.Doi.org/10.3390/polym15183754.
  • Elattar KM, Ghoniem AA, Al-Otibi FO, El-Hersh MS, Helmy Y.A. and Saber WIA (2023). Phytogenic Synthesis and Characterization of Silver Metallic/Bimetallic Nanoparticles Using Beta vulgaris L. Extract and Assessments of Their Potential Biological Activities. Applied Sciences 13(18). https://doi.org/10.3390/app131810110.
  • El ZowalatyE., Falgenhauer L., Forsythe, S. and Helmy Y.A.* (2023). Draft Genome Sequences of rare Lelliottia nimipressuralis strain MEZLN61 and two Enterobacter kobei strains MEZEK193 and MEZEK194 carrying mobile colistin resistance mcr-9 gene isolated from wastewater in South Africa. Journal of Global Antimicrobial Resistance 33 (231-237). PMID: 36948496; https://doi.org/10.1016/j.jgar.2023.03.007.
  • Tirkkonen H, Brown KV, Niemczura M, Faudemer Z, Brown C, Ponomareva L, Helmy Y.A., Thorson JS, Nybo SE, Metsa-Ketela M, and Shaaban KA (2023). Engineering BioBricks for Deoxysugar Biosynthesis and Generation of New Tetracenomycins. ACS Omega 8(23):21237-21253. PMID: 37332790; PMCID: PMC10269268; https://doi.org/10.1021/acsomega.3c02460.
  • Helmy Y.A., Kathayat, Closs Jr G, Galgozy K., Fuchs J. and Rajashekara G. (2023). Efficacy of quorum sensing and growth inhibitors alone and in combination against avian pathogenic Escherichia coli infection in chickens. Poultry Science 112(4). PMID: 36863122; PMCID: PMC10011511; https://doi.org/10.1016/j.psj.2023.102543.
  • Helmy Y.A.*, Taha-Abdelaziz K., Hawwas HA, Ghosh S, AlKafaas SS, Moawad MM, Saied EM, Kassem II, and Mawad AM (2023). Antimicrobial Resistance and Recent Alternatives to Antibiotics for the Control of Bacterial Pathogens with an Emphasis on Foodborne Pathogens. Antibiotics 12 (274). PMID: 36830185, PMCID: PMC9952301; https://doi.org/10.3390/antibiotics12020274.
  • Taha-Abdelaziz K., Singh M., Sharif S., Sharma S., Kulkarni R.R., Alizadeh M., Yitbarek A., Helmy Y.A. (2023). Intervention strategies to control Campylobacter at different stages of the food chain. Microorganisms 11(1), 113. PMID: 36677405; PMCID: PMC9866650; https://doi.org/10.3390/microorganisms11010113
  • Kumar A., Helmy Y.A., Fritts Z., Vlasova A., Saif L. and Rajashekara G. (2023). Anti-rotavirus properties and mechanisms of selected Gram-positive and Gram-negative probiotics in polarized HT-29 cells. Probiotics and Antimicrobial Proteins 15(1):107-128. PMID: 35034323; https://doi.org/10.1007/s12602-021-09884-3.

2022

  • Helmy Y.A.* and Hafez Hafez (2022). Cryptosporidiosis: From Prevention to Treatment, A Narrative Review. Microorganisms, 10 (12), 2456. PMID: 36557709; PMCID: PMC9782356; https://doi.org/10.3390/microorganisms10122456.
  • Helmy Y.A., Closs G, Jung K, Kathayat D., Srivastava V., Vlasova A. and Rajashekara G (2022). Effect of probiotic E. coli Nissle 1917 supplementation on the growth performance, immune responses, intestinal morphology, gut microbes, of Campylobacter jejuni infected chickens. Infection and Immunity, e0033722. PMID: 36135600; PMCID: PMC9584303; https://doi.org/10.1128/iai.00337-22.
  • Abo-Kadoum M. A., Abouelela M. E., Al Mousa A. A., Abo-Dahab N. F., Mosa M.A., Helmy Y.A. and Hassane A. M. A. (2022). Resveratrol biosynthesis, optimization, induction, biotransformation and bio-degradation in mycoendophytes. Frontiers in Microbiology 11(13):1010332. PMCID: PMC9593044;  PMID: 36304949; https://doi.org/10.3389/fmicb.2022.1010332.
  • Alshawwa S.Z., Alshallash K.S., Ghareeb A., Elazzazy A.M., Sharaf M., Alharthi A., Abdelgawad F.E., El-Hossary D., Jaremko M., Emwas A and Helmy Y.A.* (2022). Assessment of Pharmacological Potential of Novel Exopolysaccharide Isolated from Marine Kocuria sp. Strain AG5: Broad-Spectrum Biological Investigations. Life 12, 1387. PMID: 36143424; PMCID: PMC9504734; https://doi.org/10.3390/life12091387.
  • Helmy Y.A., Kathayat D., Deblais L., Srivastava V., Closs G, Tokarski II, RJ., Ayinde , Fuchs JR., and Rajashekara G (2022). Evaluation of novel quorum sensing inhibitors targeting auto-inducer 2 (AI-2) for the control of avian pathogenic Escherichia coli infections in chickens. Microbiology Spectrum 10 (3). PMID: 35583333; PMCID: PMC9241644; DOI: 10.1128/spectrum.00286-22.
  • Mohamed D., Ezzat SF., Elayat WM., El-Kharashi OA., Abd El-Kareem HF., Abo Nahas HH., Abdel-Wahab BA., Alshawwa SZ., Saleh A., Helmy Y.A., Khairy E. and Saied EM. (2022). Hepatoprotective Role of Carvedilol against Ischemic Hepatitis Associated with Acute Heart Failure via Targeting miRNA-17 and Mitochondrial Dynamics-Related Proteins: An In Vivo and In Silico Study. Pharmaceuticals 15(7). PMCID: PMC9319470;  PMID: 35890131;  https://doi.org/10.3390/ph15070832.
  • Khalifa E., Mohesien MT., Mossa MI., Piekutowska M., Alsuhaibani AM., Abdel-Wahab BA., Sotohy SA., Ghosh S., Helmy Y.A., Hussein M., and Abdel-Azeem AM. (2022). Diversity of Toxigenic Fungi in Livestock and Poultry Feedstuffs. International Journal of Environmental Research and Public Health 19(12). PMCID: PMC9224174;  PMID: 35742499 https://doi.org/10.3390/ijerph19127250.
  • Mohamed D.I, El-Waseef D.A, Nabih E.S, El-Kharashi O.A, Abd El-Kareem H.F, Abo Nahas H.H, Abdel-Wahab B.A, Helmy Y.A, Alshawwa S.Z and Saied E.M (2022). Acetylsalicylic Acid Suppresses Alcoholism-Induced Cognitive Impairment Associated with Atorvastatin Intake by Targeting Cerebral miRNA155 and NLRP3: In Vivo, and In Silico Pharmaceutics 14 (529). PMID: 35335908; PMCID: PMC8948796; https://doi.org/10.3390/pharmaceutics14030529.
  • Moubasher H.A, Balbool BA, Helmy Y.A, Alsuhaibani A.M, Atta A.A., Sheir D.H and Abdel-Azeem A.M (2022). Insights into Asparaginase from Endophytic Fungus Lasiodiplodia theobromae: Purification, Characterization and Antileukemic Activity. International Journal of Environmental Research and Public Health 19 (680). PMCID: PMC8775487;  PMID: 35055502; https://doi.org/10.3390/ijerph19020680.
  • Mohamed A.H, Abd El-Megeed F.H, Hassanein N.M, Youseif S.H, Farag P.F, Saleh S.A, Abdel-Wahab B.A, Alsuhaibani A.M, Helmy Y.A and Abdel-Azeem A.M (2022). Native Rhizospheric and Endophytic Fungi as Sustainable Sources of Plant Growth Promoting Traits to Improve Wheat Growth under Low Nitrogen Input. Journal of Fungi 8(2). PMID: 35205849; PMCID: PMC8875171; https://doi.org/10.3390/jof8020094.

2021

  • Hailu , Helmy Y.A.*, Carney-Knisely G., Kauffman M., Fraga D., and Rajashekara G*. (2021). Prevalence and antimicrobial resistance profiles of foodborne pathogens isolated from dairy cattle and poultry farms in North-Eastern Ohio, The United States. Antibiotics 10 (12). PMID: 34943663; PMCID: PMC8698512;  https://doi.org/10.3390/antibiotics10121450.
  • Fawzy M., Hasham A., Houta M.H., Hasham M., and Helmy Y.A* (2021). COVID-19: Risk assessment and mitigation measures in healthcare and non-healthcare workplaces. German Journal of Microbiology 2021; 1(2): 19-28. https://doi.org/10.51585/gjm.2021.2.0007.
  • Kathayat D., Helmy Y.A., Deblais L., Srivastava V., Closs Jr G, Rahul Khupse, and Gireesh Rajashekara (2021). Novel small molecule inhibitors of outer membrane reduce extra-intestinal pathogenic Escherichia coli (ExPEC) infection in avian model. Microbiology Spectrum 31;9(2): e0000621. PMID: 34468186; PMCID: PMC8557866; https://doi.org/10.1128/Spectrum.00006-21.
  • Kathayat D., Closs Jr G, Helmy Y.A., Deblais L., Srivastava V., and Rajashekara G. (2021). In Vitro and In Vivo Evaluation of Lacticaseibacillus rhamnosus GG and Bifidobacterium lactis Bb12 Against Avian Pathogenic Escherichia coli and Identification of Novel Probiotic-Derived Bioactive Peptides. Probiotics and Antimicrobial Proteins 14(6):1012-1028. PMID: 34458959; https://doi.org/10.1007/s12602-021-09840-1.
  • Kathayat D., Closs Jr G, Helmy Y.A., Lokesh D., Ranjit S., and Rajashekara G. (2021). Peptides affecting outer membrane lipid asymmetry (MlaA-OmpC/F) system reduce avian pathogenic Escherichia coli (APEC) colonization in chickens. Applied and Environmental Microbiology 16; AEM0056721. PMID: 34132592; PMCID: PMC8357279; https://doi.org/10.1128/AEM.00567-21.

2020

  • Srivastava V., Deblais L., Kathayat D., Rotondo F., Helmy Y.A., Miller S.A and Rajashekara G. (2020). Novel small molecule growth inhibitors of Xanthomonas causing bacterial spot of tomato. Phytopathology 111:940-953. https://doi.org/10.1094/PHYTO-08-20-0341-R.
  • Helmy Y.A., Kassem I.I., and Rajashekara G. (2021). Immuno-modulatory effect of probiotic coli Nissle 1917 in polarized human colonic cells against Campylobacter jejuni infection. Gut Microbes 13 (1), 1-16. PMID: 33382951; PMCID: PMC7781529; https://doi.org/10.1080/19490976.2020.1857514.
  • Hedman H.D., Krawczyk E, Helmy Y.A., Zhang L., and Varga C. (2021). Host Diversity and Potential Transmission Pathways of SARS-CoV-2 at the Human-Animal Interface. Pathogens 8;10 (2):180. PMID: 33567598; PMCID: PMC7915269; https://doi.org/10.3390/pathogens10020180.
  • Helmy Y.A., Kathayat D., Ghanem M., Jung K, Closs Jr. G., Deblais D., Srivastava V., El-Gazzar M., and Rajashekara G. (2020). Identification and characterization of novel small molecule inhibitors to control Mycoplasma gallisepticuminfection in chickens. Veterinary Microbiology 247:108799. PMID: 32768201; https://doi.org/10.1016/j.vetmic.2020.108799. 
  • Kathayat D., Antony L., Deblais L., Helmy Y.A., Scaria J., and Rajashekara G. (2020). Small molecule adjuvants potentiate colistin activity and attenuate resistance development against Escherichia coli by affecting pmrAB system. Infection and Drug Resistance 13: 2205–2222. PMID: 32764996; PMCID: PMC7360418; https://doi.org/10.2147/IDR.S260766.
  • AlgammalM., Enany M.E., El-trabilliR.M., Ghobashy M.O., and Helmy Y.A.* (2020). Prevalence, Antimicrobial Resistance Profiles, Virulence and Enterotoxins Determinant Genes of MRSA Isolated from Subclinical Bovine Mastitis in Egypt. Pathogens9 (5): 362. PMID: 32397408; PMCID: PMC7281566; https://doi.org/10.3390/pathogens9050362.
  • Helmy Y.A.*, and Fawzy M., Elaswad A., Sobieh A., Kenney S.P., Shehata A.A. (2020). The COVID-19 pandemic: A comprehensive review of taxonomy, genetics, epidemiology, diagnosis, treatment, and control. Journal of Clinical Medicine 9 (4): 1225. PMID: 32344679; PMCID: PMC7230578; https://doi.org/10.3390/jcm9041225.
  • Terefe Y., Deblais L., Ghanem M., Helmy Y.A., Mummed B., Chen D., Singh N., Ahyong V., Kalantar K., Yimer G., Hassen JY., Mohammed A., Mckune SL., Manary MJ., Ordiz MI, Gebreyes W., Havelaar A.H., and Rajashekara G. (2020). Co-occurrence of Campylobacter Species in Children from Eastern Ethiopia, and Their Association with Environmental Enteric Dysfunction, Diarrhea, and Host Microbiome. Frontiers in Public Health 8: 99. PMID: 32351922; PMCID: PMC7174729; https://doi.org/10.3389/fpubh.2020.00099.
  • Lu, Deblais L., Rajashekara G., Miller SA, Helmy Y.A., Zhang H., Wu P., Qiu Y., Xu X. (2020). High‐throughput screening reveals small molecule modulators inhibitory to Acidovorax citrulli. Plant Pathology 69 (5): 818-826. https://doi.org/10.1111/ppa.13177.  
  • Vrisman CM., Deblais L., Helmy Y.A., Johnson R., Rajashekara G., Miller SA. (2020). Discovery and characterization of low molecular weight inhibitors of Erwinia tracheiphila. Phytopathology 110 (5), 989-998. https://doi.org/10.1094/PHYTO-11-19-0440-R.
  • Deblais L., Kathayat D., Helmy Y.A., Closs Jr. G, and Rajashekara G. (2020). Translating ‘big data’: better understanding of host-pathogen interactions to control bacterial foodborne pathogens in poultry. Animal Health Research Reviews 21 (1): 15-35. PMID: 31907101; https://doi.org/10.1017/S1466252319000124.

2019

  • Abdullah HM., Bielke LR., and Helmy Y.A* (2019). Effect of arginine supplementation on growth performance and immunity of Broilers: A review. Journal of Global Innovations in Agriculture and Social Science, 7 (4): 141-144. ISSN 2311-3839. https://doi.org/10.22194/JGIASS/7.879.
  • El-Missiry AG., Abd El-Hameed LM., Saad GA., El-Badry AA., Helmy Y.A., Shehata MA. (2019). Molecular genetic characterization of human Cryptosporidium isolates and their respective demographic, environmental and clinical manifestations in Egyptian diarrheic patients. Parasitologists United Journal, 12 (3). DOI: 10.21608/puj.2019.15158.1050.
  • Deblais L.&, Helmy Y.A.&, Kumar A.*, Antwi J., Kathayat D., Munoz-Acuna U., Huang H, Carcache de Blanco E, Fuchs JR., and Rajashekara G. (2019). Novel Narrow Spectrum Benzyl Thiophene Sulfonamine Derivatives to control Campylobacter. Journal of Antibiotics 72 (7), 555-565. PMID: 30918323. https://doi.org/10.1038/s41429-019-0168-x.
  • Deblais L., Helmy Y.A., Testen A., Vrisman C., Jimenez-Madrid A., Kathayat D., Miller S, and Rajashekara G. (2019). Specific environmental temperature and relative humidity conditions and grafting affect the persistence and dissemination of Salmonella in tomato plant tissues. Applied and Environmental Microbiology 85 (11). PMID: 30926732; PMCID: PMC6532026; https://doi.org/10.1128/AEM.00403-19.
  • Fawzy M. and Helmy Y.A.* (2019). The One Health Approach is Necessary for the Control of Rift Valley Fever Infections in Egypt: A Comprehensive Review. Viruses. 2019; 11(2):139. PMID: 30736362; PMCID: PMC6410127; https://doi.org/10.3390/v11020139.
  • Deblais L., Vrisman C., Kathayat D., Helmy Y.A., Miller S., and Rajashekara G. (2019). Imidazole and Methoxybenzylamine Growth Inhibitors Reduce Salmonella Persistence in Tomato Plant Tissues. Journal of Food Protection, 82 (6): 997-1006. PMID: 31121102; https://doi.org/10.4315/0362-028X.JFP-18-555

2018

  • Helmy Y.A., Deblais L., Kassem II, Kathayat D., and Rajashekara G. (2018). Novel small molecule modulators of quorum sensing in avian pathogenic Escherichia coli (APEC). Virulence 9 (1): 1640-1657. PMID: 30270715; PMCID: PMC7000209; https://doi.org/10.1080/21505594.2018.1528844
  • Meawad A., Helmy Y.A., Shalakamy , Kathayat D., and Rajashekara G. (2018). E. coli Nissle microencapsulation in alginate-chitosan nanoparticles and its effect on Campylobacter jejuni in vitro. Applied Microbiology and Biotechnology. 102 (24): 10675-10690. PMID: 30302522; https://doi.org/10.1007/s00253-018-9417-3.
  • Kathayat D., Helmy Y.A., Deblais L., and Rajashekara G. (2018). Novel small molecules affecting cell membrane as potential therapeutics for avian pathogenic Escherichia coli. Scientific Reports 8 (1): 15329. PMID: 30333507; PMCID: PMC6193035; https://doi.org/10.1038/s41598-018-33587-5.
  • Deblais L., Helmy Y.A., Kathayat D., Huang H. C., Miller S. A., and Rajashekara G. (2018). Novel Small Molecules Affecting the Cell Envelope Integrity to Control Salmonella in Poultry. Scientific Reports 8 (1): 13381. PMCID: PMC6127322;  PMID: 30190570; https://doi.org/10.1038/s41598-018-31249-0.
  • Helmy Y.A., Spierling NG., Schmidt S., Rosenfeld UM., Reil D., Imholt C., Jacob J., Ulrich RJ., Aebischer T., and Klotz C. (2018). Occurrence and distribution of Giardiaspecies in wild rodents in Germany. Parasites & Vectors 11 (1):213. PMID: 29587877; PMCID: PMC5870188; https://doi.org/10.1186/s13071-018-2802-z.
  • El-Missiry A.G, Kamal A.E.M, Abd El-Hameed L.M.E, Saad G.A., El-Badry A.A., Helmy Y.A., and Shehata M.A. (2018). Genetic Characterization of Cryptosporidium Isolates from Humans in Greater Cairo, Egypt. Ain Shams Medical Journal. ISSN: 0002-2144. DOI: 21608/puj.2019.15158.1050.

2017

  • Helmy Y.A., Kassem II., Kumar A. and Rajashekara G. (2017). In vitro evaluation of the impact of the probiotic E. coli Nissle 1917 on Campylobacter jejuni’s invasion and intracellular survival in human colonic cells. Frontiers in Microbiology 8: 1588. PMID: 28878749; PMCID: PMC5572226;  https://doi.org/10.3389/fmicb.2017.01588.
  • Helmy Y.A.*, El-Adawy, and Abdelwhab ESM. (2017). A Comprehensive Review of Common Bacterial, Parasitic and Viral Zoonoses at the Human-Animal Interface in Egypt. Pathogens 6 (3): 33. PMCID: PMC5617990; PMID: 28754024; https://doi.org/10.3390/pathogens6030033.
  • Kassem II., Helmy Y.A., Kathayat D., Candelero-Rueda R, Kumar A., Deblais L., Huang H., Sahin O., Zhang Q., and Rajashekara G. (2017). Nonculturability Might Underestimate the Occurrence of Campylobacterin Broiler Litter. Foodborne Pathogens and Disease 14 (8): 472-477. PMID: 28622473; https://doi.org/10.1089/fpd.2017.2279.
  • Helmy Y.A., Krücken J., Abdelwhab ESM., von Samson-Himmelstjerna G., Hafez MH. (2017). Molecular diagnosis and characterization of Cryptosporidium in turkeys and chickens in Germany reveals evidence for previously undetected parasite species. PLoS One 12 (6), e0177150. PMID: 28575116; PMCID: PMC5456029; https://doi.org/10.1371/journal.pone.0177150.
  • Elaish M., Ngunjiri JM., Ali A., Xia M., Ibrahim M., Jang H., Hiremath J., Dhakal S., Helmy Y.A., Jiang X., Renukaradhya GJ., Won Lee C. (2017). Supplementation of inactivated influenza vaccine with norovirus P particle-M2e chimeric vaccine enhances protection against heterologous virus challenge in chickens. PLoS One 12 (2). PMID: 28151964; PMCID: PMC5289506; https://doi.org/10.1371/journal.pone.0171174.

2016

  • Kumar A., Drozd M., Pina-Mimbela R., Xu X., Helmy Y.A., Antwi J., Fuchs J. R., Nislow C., Templeton J., Blackall P. J., and Rajashekara G. (2016). Novel Anti-Campylobacter Compounds Identified Using High Throughput Screening of a Pre-selected Enriched Small Molecules Library. Frontiers in Microbiology 7:405. PMCID: PMC4821856;  PMID: 27092106; https://doi.org/10.3389/fmicb.2016.00405.

2014

  • Helmy Y.A.*, Klotz C., Wilking H., Krücken J., Nöckler J, Von Samson-Himmelstjerna G., Zessin KH. and Aebischer T. (2014). Epidemiology of Giardia duodenalis infection in ruminant livestock and children in the Ismailia province of Egypt: Insights by genetic characterization. Parasites & Vectors 7 (1): 321-332. PMID: 25015671; PMCID: PMC4230635; https://doi.org/10.1186/1756-3305-7-321.
  • Helmy Y.A.*, Von Samson-Himmelstjerna G., Nöckler K., and Zessin KH. (2014). Frequencies and spatial distributions of Cryptosporidium of livestock animals and children in the Ismailia province of Egypt. Epidemiology and Infection 143 (6): 1208-1218. PMID: 25084317; PMCID: PMC9507166; https://doi.org/10.1017/S0950268814001824

2013

  • Helmy Y.A.*, Krücken J., Nöckler K., Von Samson-Himmelstjerna G. and Zessin KH. (2013). Comparison between two commercially available serological tests and polymerase chain reaction in the diagnosis of Cryptosporidium in animals and diarrheic children. Parasitology Research 113 (1): 211-216. PMID: 24221885; https://doi.org/10.1007/s00436-013-3645-3.
  • Helmy Y.A.*, Krücken J., Nöckler K., Von Samson-Himmelstjerna G. and Zessin KH. (2013). Molecular epidemiology of Cryptosporidium in livestock animals and humans in the Ismailia province of Egypt. Veterinary Parasitology 193 (1-3): 15-24. PMID: 23305974; https://doi.org/10.1016/j.vetpar.2012.12.015.
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