Reportable diseases in Ontario

Diseases that are bolded should prompt an immediate notification of public health on the same day, by phone or fax. All others may be notified by the next day.

• Acquired immunodeficiency syndrome (AIDS)
• Acute flaccid paralysis
• Amebiasis
• Anaplasmosis
• Anthrax
• Babesiosis
• Blastomycosis
• Botulism
• Brucellosis
• Campylobacter enteritis
• Carbapenemase-producing Enterobacteriaceae (CPE) infection or colonization
• Chancroid
• Chickenpox (Varicella)
• Chlamydia trachomatis infections
• Cholera
• Clostridium difficile infection (CDI) outbreaks in public hospitals
• Coronavirus, novel including
  • SARS
  • MERS
  • COVID-19
• Creutzfeldt-Jakob disease, all types
• Cryptosporidiosis
• Cyclosporiasis
• Diphtheria
• Echinococcus multilocularis infection
• Encephalitis, including:
  • Primary, viral
  • Post-infectious
  • Vaccine-related
  • Subacute sclerosing panencephalitis
  • Unspecified
• Food poisoning, all causes
• Gastroenteritis, Outbreaks in institutions and public hospitals
• Giardiasis
• Gonorrhea
• Group A Streptococcal disease, invasive (iGAS)
• Group B Streptococcal disease, neonatal
• Haemophilus influenzae disease, all types, invasive
• Hantavirus pulmonary syndrome
• Hemorrhagic fevers, including:
  • Ebola virus disease
  • Marburg virus disease
  • Lassa fever
  • Other viral causes
• Hepatitis, viral
  • Hepatitis A
  • Hepatitis B
  • Hepatitis C
• Influenza, including
  • Novel strains
• Legionellosis
• Leprosy
• Listeriosis
• Lyme disease
• Measles
• Meningitis, acute
  • Bacterial
  • Viral
  • Other
• Meningococcal disease, invasive
• Mumps
• Ophthalmia neonatorum
• Paralytic shellfish poisoning
• Paratyphoid fever
• Pertussis (whooping cough)
• Plague
• Pneumococcal disease, invasive
• Poliomyelitis, acute
• Powassan virus
• Psittacosis/Ornithosis
• Q Fever
• Rabies
• Respiratory infection outbreaks in institutions and public hospitals
• Rubella
• Rubella, congenital syndrome
• Salmonellosis
• Shigellosis
• Smallpox and other Orthopoxviruses including Monkeypox
• Syphilis
• Tetanus
• Trichinosis
• Tuberculosis
• Tularemia
• Typhoid fever
• Verotoxin-producing E. coli infection indicator conditions, including hemolytic uremic syndrome (HUS)
• West Nile virus illness
• Yersiniosis