Diseases of Public Health Significance

The following list of diseases must be reported to Public Health when suspected or confirmed by laboratory testing, in accordance with Ontario's Health Protection and Promotion Act. 

Diseases marked with an asterisk (*) and all respiratory and gastroenteritis outbreaks in institutions and public hospitals should be immediately reported to Region of Waterloo Public Health.

Other diseases should be reported by the next business day.

Reportable diseases are listed below in alphabetical order, with contact information for each disease found by expanding the row using the + sign.

For emergency after hours, weekend and holiday support call 519-575-4400.

Immediately report all gastroenteritis and respiratory infection outbreaks in institutions and public hospitals (including COVID-19 and influenza) through the online form. 
Sporadic community cases of COVID-19 and influenza should be faxed to 519-883-2248.

Acute Flaccid Paralysis

Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275

Fax: 519-883-2248
Acquired Immunodeficiency Syndrome (AIDS)

Contact the Sexual Health program by the next business day.

Phone: 519-575-4400 ext. 2314

Amebiasis

Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Anaplasmosis
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Anthrax*
Contact Health Protection and Investigation immediately.

Phone: 519-575-4400
Fax: 519-883-2248
Babesiosis
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Blastomycosis

Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 

Botulism*

Contact Health Protection and Investigation immediately.

Phone: 519-575-4400
Fax: 519-883-2248

Brucellosis*

Contact Health Protection and Investigation immediately.

Phone: 519-575-4400
Fax: 519-883-2248
Campylobacter Enteritis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Candida Auris

Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400

Fax: 519-883-2248
Carbapenemase-producing Enterobacteriaceae (CPE) colonizations and infections
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Chancroid
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Chickenpox (Varicella)
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Chlamydia Trachomatis
Contact the Sexual Health program by the next business day.

Phone: 519-575-4400 ext. 2314
Cholera
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Clostridium difficile infection (CDI) outbreaks in public hospitals
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Creutzfeldt-Jakob Disease, all types*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Cryptosporidiosis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Cyclosporiasis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Diphtheria*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Echinococcus mulitilocularis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
 Encephalitis*, primary, viral
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Encephalitis, post-infectious, vaccine-related, subacute sclerosing panencephalitis or unspecified
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Food poisoning, all causes
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
 Gastroenteritis outbreaks in high-risk settings*
Contact Health Protection and Investigation immediately using the online form.
 Giardiasis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
 Gonorrhea
Contact the Sexual Health program by the next business day.

Phone: 519-575-4400 ext. 2314
 Group A Streptococcal Disease, invasive*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Group B Streptococcal Disease, neonatal
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Haemophilus Influenzae, all types, invasive*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Hantavirus Pulmonary Syndrome*
Contact Health Protection and Investigation immediately.

Phone: 519-575-4400
Fax: 519-883-2248
 Hemorrhagic Fever*, including Ebola virus, Marburg virus and other viral causes
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Hepatitis A*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Hepatitis B
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Hepatitis C
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Human Immunodeficiency Virus (HIV)
Contact the Sexual Health program by the next business day.

Phone: 519-575-4400 ext. 2314
 Lassa Fever*
Contact Health Protection and Investigation immediately.

Phone: 519-575-4400
Fax: 519-883-2248
 Legionellosis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
 Leprosy
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Listeriosis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
 Lyme Disease
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Measles*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Meningitis, acute, bacterial*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Meningitis, acute, viral or other
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Meningococcal disease*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Mpox*
Contact the Sexual Health program immediately.

Phone: 519-575-4400 ext. 2314
 Mumps*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Novel Influenzas (animal cases)
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
 Novel Influenzas (human cases)*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Ophthalmia neonatorum
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Paralytic Shellfish Poisoning
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
 Paratyphoid Fever
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Pertussis (Whooping Cough)*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Plague*
Contact Health Protection and Investigation immediately.

Phone: 519-575-4400
Fax: 519-883-2248
Pneumococcal disease, invasive
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Poliomyelitis, acute*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Powassan Virus
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Psittacosis/Ornithosis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Q Fever*
Contact Health Protection and Investigation immediately.

Phone: 519-575-4400
Fax: 519-883-2248
Rabies*
Contact Health Protection and Investigation immediately.

Phone: 519-575-4400
Fax: 519-883-2248
Respiratory infection outbreaks (including COVID-19, influenza) in high-risk settings*
Contact Health Protection and Investigation immediately using the online form.
Rubella*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Rubella, congenital syndrome*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Salmonellosis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
 Severe acute respiratory syndrome (SARS) and Middle East Respiratory Syndrome (MERS)*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
 Shigellosis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Smallpox*, other than Mpox
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Syphilis
Contact the Sexual Health program by the next business day.

Phone: 519-575-4400 ext. 2314
Tetanus
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Trichinosis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Tuberculosis, active infection*
Contact the Infectious Disease and Tuberculosis Control Program immediately.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Tuberculosis, latent infection (positive TB skin test)
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Tularemia
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Typhoid Fever
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
Verotoxin-producing E. coli infection indicator conditions, including Hemolytic Uremic Syndrome (HUS)
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 
West Nile Virus
Contact the Infectious Disease and Tuberculosis Control Program by the next business day.

Phone: 519-575-4400 ext. 5275
Fax: 519-883-2248
Yersiniosis
Contact Health Protection and Investigation by the next business day.

Phone: 519-575-4400
Fax: 519-883-2248 

 

Contact Us