As of May 1st, 2018, “Reportable Diseases" are now referred to as "Diseases of Public Health Significance". Malaria and yellow fever are no longer reportable.
Download the full Diseases of Public Health Significance list.
- updated February 2026 to include HIV
Health care providers who suspect or have confirmation of the “Diseases of Public Health Significance”, or their “etiologic agents”, as per Ontario Reg 135/18 and amendments under the Health Protection and Promotion Act, must report them to the local Medical Officer of Health.
Report Immediately
The following diseases must be reported immediately by phone:
- Monday-Friday, 8:30am to 4:30pm: Call the Thunder Bay District Health Unit at 807-625-8318 or toll-free 1-888-294-6630, ext. 8318.
- After hours and weekends/holidays: Call Thunder Bay Answering Service at 807-624-1280.
In the case of an animal bite, also complete and immediately fax the Animal Bite/Exposures Form to 807-625-4822.
- Anthrax
- Botulism
- Brucellosis
- Candida auris
- Cholera
- Clostridium difficile infection (CDI) outbreaks in public hospitals
- Creutzfeldt-Jakob Disease, all types
- Diphtheria
- Gastroenteritis outbreaks in institutions and public hospitals
- Group A Streptococcal disease, invasive
- Haemophilus influenza disease, all types, invasive
- Hantavirus Pulmonary Syndrome
- Hemorrhagic fevers, including:
- Ebola virus disease
- Marburg virus disease
- Lassa Fever
- Other viral causes
- Hepatitis, viral
- Measles
- Meningitis, acute
- Bacterial
- Meningococcal disease, invasive
- Mpox and Other Orthopoxviruses
- Novel Coronavirus (2019-nCoV)
- Plague
- Poliomyelitis, acute
- Q Fever
- Rabies
- Respiratory infection outbreaks in institutions and public hospitals
- Severe Acute Respiratory Syndrome (SARS)
- Smallpox
Report By Next Working Day
The following diseases must be reported by the next working day by fax, phone or email.
- Fax: the appropriate reporting form:
- STBBIs (fax to 807-625-4866)
- Tuberculosis (fax to 807-625-4822)
- Vector-Borne Diseases (fax to 807-625-4822)
- All other Diseases of Public Health Significance (fax to 807-625-4822)
- Phone: 807-625-8318 or toll-free at 1-888-294-6630, ext. 8318
- For STBBIs, the Sexual Health Program is also available for individual consultation by calling 807-625-8347 .
- Mail: 999 Balmoral Street, Thunder Bay, ON P7B 6E7
- Acquired Immunodeficiency Syndrome (AIDS); including HIV
- Acute flaccid paralysis (AFP)
- Amebiasis
- Anaplasmosis
- Babesiosis
- Blastomycosis
- Campylobacter enteritis
- Carbapenemase-producing Enterobacteriaceae (CPE), infection or colonization
- Chancroid
- Chickenpox (Varicella)
- Chlamydia trachomatis infections
- Cryptosporidiosis
- Cyclosporiasis
- Echinococcus Multiocularis infection
- Encephalitis, including:
- Post-infectious
- Vaccine-related
- Subacute sclerosing panencephalitis
- Unspecific
- Primary, viral
- Food poisoning, all causes
- Giardiasis, except asymptomatic cases
- Gonorrhea
- Group B Streptococcal disease, neonatal
- Hepatitis, viral
- 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 Virus
- 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