Timely reporting of communicable diseases is essential for their control.
If you suspect or have confirmation of the following specified “Diseases of Public Health Significance”, or their “etiologic agents”, as per Ontario Reg 135/18 and amendments under the Health Protection and Promotion Act, please report them to the local Medical Officer of Health.
Download the Diseases of Public Health Significance Lists
Report diseases listed below to:
- Phone: 519-258-2146 ext. 1420 or fax: 226-783-2132 (Monday to Friday from 8:30 AM to 4:30 PM).
- For after hours, weekends, and holidays, phone: 519-973-4510 or fax 226-783-2113.
- Reporting forms are available online for some diseases.
Report Immediately:
- Anthrax
- Botulism
- Brucellosis
- Creutzfeldt-Jakob Disease, all types
- Diphtheria
- Group A Streptococcal disease, invasive (iGAS)
- Haemophilus influenza disease, all types,invasive
- Hantavirus Pulmonary Syndrome
- Hemorrhagic fevers, including:
- Ebola virus disease
- Marburg virus disease
- Lassa Fever
- Other viral causes
- Hepatitis A
- Measles
- Meningococcal disease, invasive
- Diseases caused by a novel coronavirus, including:
- Severe Acute Respiratory Syndrome (SARS)
- Middle East Respiratory Syndrome (MERS)
- Coronavirus disease (COVID-19)
- Plague
- Poliomyelitis, acute
- Q Fever
- Rabies
- Smallpox and other Orthopoxviruses including Monkeypox
Report By Next Working Day:
- Acquired Immunodeficiency Syndrome (AIDS)
- Acute flaccid paralysis (AFP)
- Amebiasis
- Anaplasmosis
- Babesiosis
- Blastomycosis
- Campylobacter enteritis
- Candida auris
- Carbapenemase-producing Enterobacteriaceae (CPE), infection or colonization
- Chancroid
- Chickenpox (Varicella)
- Chlamydia trachomatis infections
- Cholera
- Clostridium difficile infection (CDI) outbreaks in public hospitals
- Cryptosporidiosis
- Cyclosporiasis
- Echinococcus Multiocularis infection
- Encephalitis, including:
- Post-infectious
- Vaccine-related
- Subacute sclerosing panencephalitis
- Unspecific
- Primary, viral
- Food poisoning, all causes
- Gastroenteritis outbreaks in institutions and public hospitals
- Giardiasis, except asymptomatic cases
- Gonorrhoea
- Group B Streptococcal disease, neonatal
- Hepatitis B
- Hepatitis C
- Influenza
- Legionellosis
- Leprosy
- Listeriosis
- Lyme Disease
- Meningitis, acute
- Viral
- Other
- Bacterial
- Mumps
- Ophthalmia neonatorum
- Paralytic shellfish poisoning (PSP)
- Paratyphoid Fever
- Pertussis (Whooping Cough)
- Pneumococcal disease, invasive
- Powassan
- Psittacosis/Ornithosis
- Respiratory infection outbreaks in institutions and public hospitals
- Rubella
- Rubella, congenital syndrome
- Salmonellosis
- Shigellosis
- Syphilis
- Tetanus
- Trichinosis
- Tuberculosis
- Tularemia
- Typhoid Fever
- Verotoxin-producing E. coli infection including: Haemolytic Uraemic Syndrome (HUS)
- West Nile Virus Illness
- Yersiniosis