Timely reporting of communicable diseases is essential for their control.
If you suspect or have confirmation of any “disease of public health significance,” or its etiologic agent, as per Ontario Regulation 135/18 under the Health Protection and Promotion Act, report it to the local Medical Officer of Health
Diseases that should be reported immediately
- Anthrax
- Botulism
- Brucellosis
- Coronavirus disease 2019 (COVID-19)
- Creutzfeldt-Jakob Disease, all types
- Diphtheria
- Gastroenteritis outbreaks in institutions and public hospitals
- Group A Streptococcal disease, invasive
- Haemophilus influenzae disease, all types, invasive
- Hantavirus Pulmonary Syndrome
- Hemorrhagic fevers, including:
- Ebola virus disease
- Marburg virus disease
- Lassa Fever
- Other viral causes
- Hepatitis, viral
- Hepatitis A
- Measles
- Meningococcal disease, invasive
- Plague
- Poliomyelitis, acute
- Q Fever
- Rabies
- Respiratory infection outbreaks in institutions and public hospitals
- Diseases caused by a novel coronavirus, including Severe Acute Respiratory Syndrome (SARS), Middle East Respiratory Syndrome (MERS)
- Smallpox and other orthopoxviruses, including mpox
Diseases that should be reported the same day
- Acute flaccid paralysis
- Clostridium difficile infection (CDI) outbreaks in public hospitals Edited: organism name
- Cryptosporidiosis
- Cyclosporiasis
- Encephalitis – primary, viral
- Food poisoning, all causes
- Gastroenteritis, institutional outbreaks
- Giardiasis, except asymptomatic cases
- Hepatitis A, viral
- Hepatitis B, viral
- Legionellosis
- Listeriosis
- Meningitis, acute – viral, other
- Mumps
- Paralytic shellfish poisoning
- Paratyphoid fever
- Pertussis (whooping cough)
- Respiratory infection outbreaks in institutions
- Rubella
- Salmonellosis
- Shigellosis
- Tularemia
- Typhoid fever
- Verotoxin‑producing E. coli infection, including haemolytic uraemic syndrome (HUS)
- Yersiniosis
Diseases that should be reported the next business 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
- Unspecified
- Primary, viral
- Food poisoning, all causes
- Giardiasis, except asymptomatic cases
- Gonorrhea
- Group B Streptococcal disease, neonatal
- Hepatitis, viral
- 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
- 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
Complete list of reportable infectious diseases
- Acquired Immunodeficiency Syndrome (AIDS)
- Acute Flaccid Paralysis
- Amebiasis
- Anaplasmosis
- Anthrax
- Babesiosis
- 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
- Cryptosporidiosis
- Cyclosporiasis
- Diphtheria
- Diseases caused by a novel coronavirus, including Severe Acute Respiratory Syndrome (SARS) and Middle East Respiratory Syndrome (MERS) and COVID-19 (only those that work in high-risk settings)
- 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, institutional outbreaks
- Giardiasis, except asymptomatic cases
- Gonorrhoea
- Group A Streptococcal disease, invasive
- Group B Streptococcal disease, neonatal
- Haemophilus influenza disease, all types, invasive
- Hantavirus pulmonary syndrome
- Hemorrhagic fevers, including,
- i. Ebola virus disease
- ii. Marburg virus disease
- iii. Other viral causes
- Hepatitis A, viral
- Hepatitis B, viral
- Hepatitis C, viral
- Influenza
- Lassa Fever
- Legionellosis
- Leprosy
- Listeriosis
- Lyme Disease
- Measles
- Meningitis, acute,
- i. bacterial
- ii. viral
- iii. other
- Meningococcal disease, invasive
- Mpox
- Mumps
- Ophthalmia neonatorum
- Paralytic Shellfish Poisoning
- Paratyphoid Fever
- Pertussis (Whooping Cough)
- Plague
- Pneumococcal disease, invasive
- Poliomyelitis, acute
- Powassan Virus
- Psittacosis/Ornithosis
- Q Fever
- Rabies
- Respiratory infection outbreaks in institutions
- Rubella
- Rubella, congenital syndrome
- Salmonellosis
- Shigellosis
- Smallpox
- Syphilis
- Tetanus
- Trichinosis
- Tuberculosis
- Tularemia
- Typhoid Fever
- Verotoxin-producing E. coli infection, including Haemolytic Uremic Syndrome (HUS)
- West Nile Virus Illness
- Yersiniosis
Health care providers and labs:
To report a suspected or confirmed case, contact us at:
- Brantford-Brant: Phone 519‑751‑4937 ext. 6454 | Fax 519‑753‑9127
- Haldimand-Norfolk: Phone 519‑900‑9600 | Fax 519‑805‑3269
View the full list of reportable diseases from the Ministry of Health.