Reportable Diseases
This list of reportable diseases, now known as Diseases of Public Health Significance takes effect May 1, 2018. The following communicable diseases, including presumptive and suspected cases must be reported to the local Medical Officer of Health as per Ontario Regulation 135/18 and amendments under the Health Protection and Promotion Act.
Reportable diseases of public health significance
Diseases marked " * " should be reported immediately by telephone to the Medical Officer of Health. During business hours, call 613-549-1232, after hours and holidays, call 613-507-3100; other diseases are to be reported the next working day by phone, fax, or mail.
- 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
- COVID-19
- *Creutzfeldt-Jakob Disease, all types
- Cryptosporidiosis
- Cyclosporiasis
- *Diphtheria
- Echinococcus multilocularis infection
- Encephalitis, primary, viral
- Encephalitis, post-infectious, vaccine-related, subacute sclerosing panencephalitis, 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: Ebola virus disease, Marburg virus disease, Lassa fever, and other viral causes
- *Hepatitis A, viral
- Hepatitis B, viral
- Hepatitis C, viral
- Influenza
- Legionellosis
- Leprosy
- Listeriosis
- Lyme Disease
- *Measles
- Meningitis, acute, including: bacterial, viral and other
- *Meningococcal disease, invasive
- Monkeypox
- 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