
This section includes case definitions*, case counting guidelines, clinical evidence, reporting requirements and links to forms and quick reference guides.
* The case definitions contained in this section are surveillance case definitions, which are used for identifying and classifying cases for provincial and national reporting purposes. For many conditions of public health importance, action to contain disease should be initiated as soon as a problem is identified; in many circumstances, appropriate public health action should be undertaken even though insufficient information is available to determine whether a client meets the case definition. Refer to the Communicable Disease Control Manual for guidance on public health case management.
Acquired Immunodeficiency Syndrome (AIDS)
Acute Flaccid Paralysis
Adverse Events Following Immunization (AEFI)
Anaplasmosis
Anthrax
Avian Influenza (H5N1)
Campylobacteriosis
Chlamydia
Cholera
Clostridium Difficile
COVID-19
Creutzfeldt Jakob Disease Classic
Cryptosporidiosis
Cyclosporiasis
Ebola Virus Disease
E. Coli (see Verotoxigenic E Coli)
Flu (see Influenza)
Giardiasis
Gonorrhea
Group A Streptococcal Disease Invasive
Group B Streptococcal Disease of Newborns
Hantavirus Pulmonary Syndrome
Hepatitis A
Hepatitis B
Hepatitis C
Hib Invasive Disease
Human Immunodeficiency Virus (HIV)
Malaria
Measles
Meningitis (Bacterial)
Meningococcal Disease Invasive
Methicillin-resistant Staphylococcus Aureus
Mpox
Mumps
Salmonellosis
Severe Acute Respiratory Infection (SARI)
Severe Acute Respiratory Syndrome (SARS)
Shellfish Poisoning
Shiga toxin-producing E. coli
Shigellosis
Smallpox
Syphilis
Syphilis - Congenital
Vancomycin Resistant Enterococcus (VRE)
Verotoxigenic E. coli (see Shiga toxin-producing E. coli)
Viral Hemorrhagic Fevers