Reportable Diseases

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The following specified reportable diseases, including presumptive and/or suspect cases are to be reported to the local Medical Officer of Health.
Ontario Regulation 557/90, 558/91 and 559/90 and amendments under the Health Protection and Promotion Act

  • Acquired Immunodeficiency syndrome (AIDS)
  • Acute Flaccid Paralysis (AFP)
  • Amebiasis
  • *Anthrax
  • *Botulism
  • *Brucellosis
  • Campylobacter enteritis
  • Chancroid
  • Chickenpox (Varicella)
  • Chlamydia trachomatis infections
  • Cholera
  • *Clostridium difficile Infection (CDI) outbreaks in public hospitals
  • *Cryptosporidiosis
  • *Cyclosporiasis
  • *Diphtheria
  • *Encephalitis, including
    • *Primary, viral
    • Post-infectious
    • Vaccine-related
    • Subacute sclerosing panencephalitis
    • Unspecified
  • *Food poisoning, all causes
  • *Gastroenteritis, institutional outbreaks
  • *Giardiasis, except asymptomatic cases
  • Gonorrhoea
  • *Group A Streptococcal disease, invasive
  • Group B Streptococcal disease, neonatal
  • *Haemophilus influenzae b disease, invasive
  • *Hantavirus pulmonary syndrome
  • *Hemorrhagic fevers, including
    • *Ebola virus disease
    • *Marburg virus disease
    • *Other viral causes
  • *Hepatitis, viral,
    • *Hepatitis A
    • Hepatitis B
    • Hepatitis C
  • Influenza
  • *Lassa Fever
  • *Legionellosis
  • Leprosy
  • *Listeriosis
  • Lyme Disease
  • Malaria
  • *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
  • Psittacosis/Ornithosis
  • *Q Fever
  • *Rabies
  • *Respiratory infection outbreaks in institutions
  • Rubella
  • Rubella, congenital syndrome
  • Salmonellosis
  • *Severe Acute Respiratory Syndrome (SARS)
  • *Shigellosis
  • *Smallpox
  • Syphilis
  • Tetanus
  • Transmissible Spongiform Encephalopathy: Creutzfeldt-Jakob Disease, all types
  • Trichinosis
  • Tuberculosis
  • *Tularemia
  • *Typhoid Fever
  • *Verotoxin-producing E. coli infection indicator conditions, including Haemolytic Uraemic Syndrome (HUS)
  • *West Nile Virus Illness
  • *Yellow Fever
  • Yersiniosi

* Diseases and all outbreaks in institutions should be reported immediately to the Medical Officer of Health by telephone. Other diseases are to be reported the next business day.

      Outbreaks requiring reporting