Diseases of Public Health Significance

The following designated Diseases of Public Health Significance (new Ontario Regulation 135/18 under the Health Protection and Promotion Act) are to be reported to the Eastern Ontario Health Unit (EOHU). Healthcare providers who immunize are also required to report any adverse events following immunization (AEFIs) to the EOHU.

* NOTE: Diseases marked with an asterisk (*) and respiratory infection outbreaks in institutions should be reported immediately to the EOHU by telephone. Other diseases are to be reported by the next working day.

  • Acquired immunodeficiency syndrome (AIDS)
  • Acute Flaccid Paralysis (AFP)
  • Amebiasis
  • Anaplasmosis
  • Anthrax*
  • Babesiosis
  • Blastomycosis
  • Botulism*
  • Brucellosis*
  • Campylobacter enteritis
  • Candida auris infection
  • Carbapenamase-producing Enterobacteriaceae (CPE), colonization or infection
  • Chancroid
  • Chickenpox (Varicella)
  • Chlamydia
  • Cholera*
  • Clostridium difficile infection (CDI) outbreaks in public hospitals
  • Coronaviruses (novel) including:
    • Coronavirus Disease 2019 (COVID-19)
    • Severe Acute Respiratory Syndrome (SARS)*
    • Middle East Respiratory Syndrome (MERS)*
  • Creutzfeldt-Jakob Disease, all types
  • Cryptosporidiosis
  • Cyclosporiasis
  • Diphtheria*
  • Echinococcus multilocularis infection
  • Encephalitis including:
    • Primary, viral (including WNV)
    • Post-infectious
    • Vaccine-related
    • Subacute sclerosing panencephalitis
    • Unspecified
  • Food poisoning, all causes*
  • Gastroenteritis, outbreaks in institutions/public hospitals*
  • Giardiasis, except asymptomatic cases
  • Gonorrhea
  • Group A streptococcal infections, invasive*
  • Group B streptococcal infections, neonatal
  • Haemophilus influenza disease all types, invasive*
  • Hantavirus pulmonary syndrome*
  • Hemorrhagic fevers, including:*
    • Ebola virus*
    • Lassa fever*
    • Marburg virus*
    • Other viral causes*
  • Hepatitis viral:
    • Hepatitis A*
    • Hepatitis B
    • Hepatitis C
  • Influenza
  • Legionellosis*
  • Leprosy
  • Listeriosis
  • Lyme disease
  • Measles*
  • Meningitis, acute:*
    • Bacterial*
    • Viral
    • Other
  • Meningococcal disease, invasive*
  • Mumps*
  • Ophthalmia neonatorum
  • Paralytic Shellfish Poisoning (PSP)*
  • Paratyphoid fever
  • Pertussis (Whooping cough)
  • Plague*
  • Pneumococcal disease, invasive
  • Poliomyelitis, acute*
  • Powassan virus
  • Psittacosis/Ornithosis
  • Q Fever
  • Rabies*
  • Respiratory infection outbreaks in institutions/public hospitals*
  • Rubella*
  • Rubella, congenital syndrome
  • Salmonellosis
  • Shigellosis*
  • Smallpox and other Orthopoxviruses including mpox (monkeypox)*
  • Syphilis
  • Tetanus
  • Trichinosis
  • Tuberculosis
  • Tularemia*
  • Typhoid fever *
  • Verotoxin-producing E. coli infection, including Hemolytic Uraemic Syndrome (HUS)*
  • West Nile Virus (WNV)
  • Yersiniosis

To report a disease or an AEFI, please call 613-933-1375 or 1-800-267-7120 and ask for the Department of Control of Infectious Diseases