Group IV: Single-stranded RNA viruses (Positive-sense)

Biology : Viruses

Pathogens

Astroviridae

• Various species
• Gastroenteritis

Caliciviridae

• Norovirus 
• (Most common cause of) Gastroenteritis

Coronaviridae

• Severe acute respiratory syndrome-related coronavirus 
• Severe acute respiratory syndrome (SARS)
• Middle East respiratory syndrome-related coronavirus
• Middle East respiratory syndrome (MERS)
• Severe acute respiratory syndrome coronavirus 2
• Novel coronavirus disease 2019 (COVID-19)

Flaviviridae

• Dengue virus
• Dengue
• Hepacivirus C 
• Viral hepatitis
• GB virus C (formerly known as Hepatitis G virus) 
• No known pathogenesis
• West Nile virus
• West Nile fever
• Yellow fever virus
• Yellow fever 
• Zika virus
• Zika fever

Hepeviridae

• Hepatitis E virus
• Viral hepatitis

Picornaviridae

• Coxsackie A virus 
• Hand, foot, and mouth disease
• Coxsackie B virus
• Bornholm disease (epidemic pleurodynia)
• Coxsackievirus-induced cardiomyopathy
• Persistent Coxsackie B virus (non-cytolytic infection)
• Echovirus 
• Neonatal echovirus infection
• Aseptic meningitis
• Viral myocarditis
• Foot-and-mouth disease virus
• Foot-and-mouth disease
• Hepatovirus A
• Viral hepatitis
• Poliovirus
• Poliomyelitis 
• Rhinovirus
• The predominant cause of the common cold

Togaviridae

• Alphavirus
• Arthritis
• Encephalitis
• Rubella virus 
• Rubella