Reportable Infectious Diseases

The following diseases are reportable to the City of Hamilton’s Medical Officer of Health under Ontario Regulations 558/91 and amendments under the Health Protection and Promotion Act.

Poster of reportable disease to print and post (PDF, 177 KB)

Diseases that are reportable immediately

The following diseases should be reported immediately to the Medical Officer of Health by calling 905-546-2063.

  • Anthrax
  • Botulism
  • Brucellosis
  • Cholera
  • Clostridium difficile associated disease (CDAD), public hospital outbreaks
  • Diphtheria
  • Encephalitis (primary, viral)
  • Food poisoning, all causes
  • Gastroenteritis, institutional outbreaks
  • Group A Streptococcal disease, invasive
  • Haemophilus influenzae b disease, invasive
  • Hantavirus pulmonary syndrome
  • Hemorrhagic fevers including:
    • Ebola virus disease
    • Marburg virus disease
    • Other viral causes
  • Hepatitis A
  • Influenza, in institutions
  • Lassa fever
  • Legionellosis
  • Listeriosis
  • Measles
  • Meningitis, acute, bacterial
  • Meningococcal disease, invasive
  • Mumps
  • Paratyphoid fever
  • Plague
  • Poliomyelitis, acute
  • Q fever
  • Rabies
  • Respiratory outbreak infections in institutions
  • Rubella
  • Severe Acute Respiratory Syndrome or SARS
  • Shigellosis
  • Smallpox
  • Tularemia
  • Typhoid fever
  • Verotoxin, producing E. coli infection and indicator conditions including Haemolytic Uraemic Syndrome or HUS
  • Yellow fever

Diseases that are reportable by the next working day

The following diseases are reportable by the next working day by faxing 905-546-4078.

  • Acquired Immunodeficiency Syndrome or AIDS
  • Acute Flaccid Paralysis, or AFP
  • Amebiasis
  • Campylobacter enteritis
  • Chancroid
  • Chickenpox (varicella)
  • Chlamydia trachomatis infections
  • Creutzfeldt-Jakob Disease
  • Cryptosporidiosis
  • Cyclosporiasis
  • Encephalitis including:
    • post-infectious
    • vaccine-related
    • subacute sclerosing panencephalitis
    • unspecified
  • Giardiasis, except asymptomatic cases
  • Gonorrhoea
  • Group B Streptococcal disease, neonatal
  • Hepatitis B
  • Hepatitis C
  • Influenza
  • Leprosy
  • Lyme disease
  • Malaria
  • Meningitis including:
    • viral
    • other
  • Ophthalmia neonatorum
  • Paralytic Shellfish Poisoning, or PSP
  • Pertussis (whooping cough)
  • Pneumococal disease, invasive
  • Psittacosis, Ornithosis
  • Rubella, congenital syndrome
  • Salmonellosis
  • Syphilis
  • Tetanus
  • Trichinosis
  • Tuberculosis
  • West Nile Virus illness
  • Yersiniosis