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Diseases of Public Health Significance

IMPORTANT:

A list of diseases of public health significance (formerly reportable diseases) is provided below. Please note that all diseases and outbreaks (including presumptive, suspected or confirmed cases) identified in bold with an asterisk (*) must be reported immediately to the Medical Officer of Health by calling 311.

All other diseases must be reported by the next business day to the Medical Officer of Health:

  • Call 311 Monday to Friday, 8:30 a.m. to 4:30 p.m. OR
  • Fax 905-825-8797 Monday to Friday, 8:30 a.m. to 4:30 p.m.
O. Reg. 135/18 Designation of Diseases under the Health Protection and Promotion Act, R.S.O. 1990, c. H. 7

Fact sheet: Diseases of public health significance

  • Acquired Immunodeficiency Syndrome (AIDS)
  • Acute Flaccid Paralysis
  • Amebiasis
  • * Anthrax
  • 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
  • Creutzfeldt-Jakob Disease, all types
  • * Cryptosporidiosis
  • Cyclosporiasis
  • * Diphtheria
  • Echinococcus multilocularis infection
  • *Encephalitis, including:
    • * i. Primary, viral
    • ii. Post-infectious
    • iii. Vaccine-related
    • iv. Subacute sclerosing panencephalitis
    • v. Unspecified
  • * Food poisoning, all causes
  • * Gastroenteritis, outbreaks in institutions and public hospitals
  • * Giardiasis, except asymptomatic cases
  • Gonorrhoea
  • * Group A Streptococcal disease, invasive
  • Group B Streptococcal disease, neonatal
  • * Haemophilus influenzae disease, all types, invasive
  • * Hantavirus pulmonary syndrome
  • * Hemorrhagic fevers, including:
    • * i. Ebola virus disease
    • * ii. Marburg virus disease
    • * iii. Lassa fever
    • * iv. Other viral causes
  • * Hepatitis A, viral
  • * Hepatitis B, viral
  • Hepatitis C, viral
  • Influenza
  • * Legionellosis
  • Leprosy
  • * Listeriosis
  • Lyme Disease
  • * Measles
  • * Meningitis, acute, including:
    • * i. bacterial
    • ii. viral
    • iii. other
  • * Meningococcal disease, invasive
  • * Mumps
  • Ophthalmia neonatorum
  • Paralytic Shellfish Poisoning
  • * Paratyphoid Fever
  • * Pertussis (Whooping Cough)
  • * Plague
  • Pneumococcal disease, invasive
  • * Poliomyelitis, acute
  • Psittacosis/Ornithosis
  • Q Fever
  • * Rabies
  • * Respiratory infection outbreaks in institutions and public hospitals
  • Rubella
  • Rubella, congenital syndrome
  • Salmonellosis
  • * Severe Acute Respiratory Syndrome (SARS)
  • * Shigellosis
  • * Smallpox
  • Syphilis
  • Tetanus
  • Trichinosis
  • Tuberculosis
  • * Tularemia
  • * Typhoid Fever
  • * Verotoxin-producing E. coli infection, including Haemolytic Uraemic Syndrome (HUS)
  • * West Nile Virus Illness
  • Yersiniosis