Preface xxi Part 1: Introduction and Genetic Insights 1 1 Introduction to Viral Storms: Infectious Disease 3 Shivaprasad Sirimalla, Sanjit Sah, Uday Venkat Mateti and Allen Pinto 1.1 Introduction to Infectious Disease 4 1.2 Virology: Overview of Virus, Virus Structure, Classification, Replication, and Transmission 6 1.2.1 Overview of the Virus 6 1.2.2 Virus Structure 7 1.2.
3 Classification of Viruses 8 1.2.4 Viral Replication 14 1.2.5 Viral Transmission 15 1.3 Viral Storms (Major Pandemics) 17 1.3.1 The Spanish Flu (1918-1919) 17 1.
3.2 HIV/AIDS Pandemic (1980s-Present) 18 1.3.3 Sars (2002-2003) 19 1.3.4 H1N1 Influenza (2009) 19 1.3.5 COVID-19 Pandemic (2019-Present) 20 1.
4 Factors Contributing to Viral Storms 21 1.4.1 Environmental Factors, Climate Change, and Urbanization 21 1.4.2 Social Factors: Global Travel, Population Density, and Healthcare Access 22 1.4.3 Biological Factors: Viral Mutations and Host Immune Response 24 1.5 Norovirus 25 1.
5.1 Introduction to Norovirus: Overview of the Virus and Its Significance 25 1.5.2 Epidemiology: Global Impact and Spread of Norovirus 26 1.5.3 Clinical Presentation: Symptoms, Severity, and Complications 27 1.5.4 Transmission and Prevention: Modes of Transmission and Strategies to Prevent Outbreaks 28 1.
6 Summary of Key Points 29 1.7 Conclusion 30 References 31 2 Norovirus: Its Role in Gastroenteritis Outbreaks 39 Ranjana Rohilla and Shriyansh Srivastava 2.1 Infectious Etiology of Gastroenteritis 40 2.2 Introduction to Norovirus Gastroenteritis 41 2.3 History of Norovirus and Outbreaks 42 2.4 Epidemiology and Common Settings of Norovirus Outbreaks 44 2.4.1 Healthcare Facilities 46 2.
4.2 Restaurants and Other Food Establishments 46 2.4.3 School and Child Day Care 48 2.4.4 Cruise Ships 48 2.5 Clinical Features 48 2.6 Gastroenteritis in Immunocompromised Individuals 49 2.
7 Gastroenteritis in Immunocompetent Individuals 50 2.8 Economic Burden of Infection 51 2.9 Preparedness for Outbreaks 51 2.10 Conclusion 52 References 53 3 The Genetics of Norovirus: Understanding Its Genome and Genogroups 61 Naga Rani Kagithala, Rahul Sharma, Sasikanth Kothamasu, Shriyansh Srivastava and Ismail A. Ibrahim 3.1 Introduction 62 3.2 Norovirus Genome 64 3.2.
1 Structure and Organizational Forms of the Norovirus Genome 64 3.2.2 RNA Genome Characteristics 64 3.2.3 Open Reading Frames (ORFs) 65 3.2.4 Non-Structural Proteins (ORF1) 65 3.2.
5 Principal Capsid Protein (VP1): ORF 2 66 3.2.6 ORF3: VP2 or Minor Capsid Protein 66 3.3 Genetic Diversity in Norovirus 66 3.3.1 Genogroups and Genotypes 66 3.3.2 Mechanisms of Genetic Variation 67 3.
3.3 Mutation Rates and Hotspots 68 3.3.4 Recombination Events 70 3.3.5 Evolutionary Dynamics of Norovirus 70 3.4 Norovirus Genogroups 71 3.4.
1 Classification and Characteristics of Norovirus Genogroups 71 3.4.2 Classification of VP1 Sequences 72 3.4.3 RdRp Designations 72 3.4.4 Genogroup I (GI) 72 3.4.
5 Genogroup II (GII) 73 3.4.6 Genogroup III (GIII) 73 3.4.7 Epidemiology of Norovirus Genogroups 74 3.5 Molecular Techniques for Norovirus Genetic Analysis 75 3.5.1 Sequencing Technologies 75 3.
5.2 Next-Generation Sequencing (NGS) 76 3.5.3 Whole-Genome Sequencing (WGS) 80 3.5.4 Phylogenetic Analysis 80 3.5.5 Genotyping and Molecular Epidemiology 81 3.
6 Implications of Norovirus Genetic Variability 82 3.6.1 Impact on Vaccine Development 82 3.6.1.1 Monovalent Vaccines 82 3.6.1.
2 Bivalent Vaccines 83 3.6.2 Antiviral Drug Resistance 83 3.6.3 Public Health Challenges 84 3.7 Recent Advances in Norovirus Genetics 85 3.7.1 New Discoveries in Norovirus Genomic Research 85 3.
7.2 Emerging Genogroups and Strains 86 3.7.3 Future Directions in Norovirus Genetics 86 3.8 Conclusion 87 Abbreviations 87 References 88 4 Environmental Factors in Norovirus Outbreaks: Temperature and Rainfall 99 Neeraj Kumar, Akanksha, Shriyansh Srivastava and Mohd Mujeeb 4.1 Introduction 100 4.2 Evolution of Norovirus 103 4.2.
1 Antigenic Drift 103 4.2.2 Antigenic Shift 103 4.2.3 Recombination Events 104 4.2.4 Genetic Diversity 104 4.2.
5 Mutation Rates 104 4.2.6 Pandemic Strains 105 4.2.7 Geographic Differences 105 4.2.8 Temporal Trends 105 4.3 Fatal Details Regarding the Norovirus 105 4.
4 Mode of Transmission of Norovirus 106 4.4.1 Environmental Source 107 4.4.2 Influence of Temperature on Norovirus Outbreaks 108 4.5 Correlation Between Temperature Fluctuations and Outbreaks 109 4.6 Effect of Norovirus on Humidity 110 4.7 The Impact of Rainfall on the Spread of the Norovirus 110 4.
8 The Impact of Water on the Spread of the Norovirus 111 4.9 Norovirus Combined Effects of Temperature and Rainfall 112 4.10 Stability of Norovirus 112 4.11 Case Study 113 4.12 Global Patterns in Temperature- and Rainfall-Related Outbreaks 120 4.13 Mitigation Strategies and Public Health Interventions 121 4.14 Conclusion 123 References 124 5 Zoonotic Transmission of Norovirus: Current Understanding and Future Implications 129 Vini Mehta, Sapna Negi, Snehasish Tripathy, Sarvesh Rastogi and Ankita Mathur 5.1 Brief Overview of Norovirus 130 5.
2 Epidemiology of Norovirus 131 5.3 Symptoms of Norovirus-Associated Gastroenteritis 132 5.4 Mode of Transmission of Norovirus 132 5.4.1 Vomitus or Stool 132 5.4.2 Through Contaminated Food and Water 133 5.5 Zoonotic Transmission 134 5.
5.1 Animal Reservoirs 135 5.5.2 Wild Animals 138 5.6 Zoonotic Transmission Mechanisms of Norovirus 139 5.6.1 Animal-to-Human Transmission 139 5.6.
2 Human-to-Animal Transmission 140 5.7 Zoonotic Transmission Mechanism 141 5.8 Future Implications and Research Directions 142 5.9 Conclusion 143 Abbreviations 144 References 144 Part 2: Transmission, Dynamics and Environmental Impacts 151 6 Genetic Changes in Norovirus and Their Impact on Infectivity/Virulence 153 Soumya Patil, Vijayalaxmi Bangra Manjeshwara, Uday Venkat Mateti and Raushan Kumar Chaudhary 6.1 Introduction 154 6.2 Classification of NoV 155 6.3 Genomic Structure and Functions 156 6.3.
1 ORF1: The Replication Engine 156 6.3.2 ORF2: The Master Builder 159 6.3.3 ORF3: The Stabilizer 159 6.3.4 ORF4: Murine Norovirus 159 6.4 NoV Life Cycle: Molecular Mechanism of NoV Genome Replication 159 6.
5 Transmission 161 6.6 Molecular Diversity 162 6.7 Evolutionary Mechanisms and Dominance 163 6.7.1 Point Mutation 164 6.7.2 Recombination 167 6.7.
2.1 Mechanisms of Recombination 168 6.8 Recent Epidemiological Trends 170 6.9 Global Impact and Challenges 174 6.10 Conclusion 176 Abbreviations 177 References 177 7 Bridging the Gap: One Health Approach in Norovirus 187 Sasikanth Kothamasu, Naga Rani Kagithala, Dheeraj Sharma, Shriyansh Srivastava, Aroop Mohanty and Rakesh Sahu 7.1 Overview of Norovirus: Structure and Epidemiology 188 7.2 Understanding the One Health Approach 190 7.2.
1 Definition and Principles of One Health 190 7.2.2 Historical Context and Evolution of the One Health Concept 190 7.2.3 Relevance of One Health to Norovirus Control 191 7.2.3.1 Environmental Transmission Pathways 191 7.
3 Transmission Pathways of Norovirus 194 7.3.1 Human-to-Human Transmission 194 7.3.2 Environmental Contamination and Spread 194 7.3.3 Zoonotic Potential and Animal Reservoirs 195 7.3.
4 Role of Food and Water in Norovirus Outbreaks 195 7.4 Epidemiology of Norovirus: A Global Perspective 196 7.4.1 Geographic Distribution and Prevalence 196 7.4.2 Risk Factors for Infection 196 7.4.3 Seasonal and Regional Variations in Norovirus Incidence 197 7.
5 The One Health Approach to Norovirus Surveillance 198 7.5.1 Integrating Human, Animal, and Environmental Surveillance Systems 198 7.5.2 Advances in Diagnostic Techniques for Norovirus Detection 199 7.5.3 Case Studies: Successful Implementation of One Health Surveillance 199 7.6 Prevention and Control Strategies 200 7.
6.1 Hygiene and Sanitation Practices 200 7.6.2 Vaccination Development and Challenges 201 7.6.3 Environmental Management and Water Safety 201 7.6.4 Role of Policy and Legislation in Norovirus Prevention 202 7.
7 Interdisciplinary Collaboration in One Health 202 7.7.1 Building Effective Partnerships Between Health Sectors 202 7.7.2 Case Studies of Multidisciplinary Efforts in Controlling Norovirus 203 7.7.3 Challenges and Opportunities in Collaborative Approaches 204 7.8 Case Studies: One Health Success Stories 205 7.
8.1 Outbreak Response in Different Regions 205 7.8.2 Lessons Learned from Norovirus Control Efforts 206 7.8.3 Scaling Up One Health Strategies Globally 206 7.9 Future Directions in Norovirus Research and Control 207 7.9.
1 Emerging Trends in Norovirus Epidemiology 207 7.9.2 Innovations in Vaccination and Treatment 207 7.9.3 The Role.