Reporting a communicable disease

Timely reporting of diseases of public health significance is essential for their control. If you suspect or have confirmation of the following specified diseases and events (as per Ontario Regulation 135/18 and amendments under the Health Protection and Promotion Act) please report them to the local Medical Officer of Health:

Diseases (either suspected or confirmed) marked with an asterisk (*) are reportable immediately by telephone. All other diseases are reported the next business day by fax or phone. Note the following exceptions: COVID-19 fatalities are reportable as soon as possible (within 12 hours when feasible) and the COVID-19 complication Multisystem Inflammatory Syndrome in Children (MIS-C) is reportable within 7 days of diagnosis.

How to report

Monday to Friday from 8:30 am to 4:30 pm: Call 613-580-2424, extension 24224 or fax 613-580-9640

After hours, on weekends, or holidays: Call 3-1-1

Sexually transmitted infections (STIs): Call 613-580-2424, extension 12580 or fax 613-580-2831

List of reportable communicable diseases

Diseases (either suspected or confirmed) marked with an asterisk (*) are reportable immediately by telephone. All other diseases are reported the next business day by webform, fax or phone.

A generic webform and reporting form (pdf - 235 KB) are available for your convenience (This document is currently not in an accessible format)

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z


*Acute flaccid paralysis

*Adverse event following immunization (AEFI)

AIDS (Acquired Immunodeficiency Syndrome) 

Amebiasis (Entamoeba histolytica)

* Anthrax


* Bites or exposures to potentially rabid animals


* Botulism

* Brucellosis

Campylobacter enteritis

Carbapenemase-producing Enterobacteriaceae (CPE) infection or colonization


Chickenpox (Varicella)

Chlamydia trachomatis infections

* Cholera

Clostridium difficile infection (CDI) outbreaks in public hospitals

Coronavirus disease (SARS-CoV-2) deaths (COVID-19 related fatalities)

Creutzfeldt-Jakob Disease, all types



* Diphtheria

* Diseases caused by a novel coronavirus, Severe Acute Respiratory Syndrome (SARS), and Middle East Respiratory Syndrome (MERS)

Echinococcus multilocularis infection

Encephalitis (primary viral, post-infectious, unspecified, SSPE)

* Food poisoning

* Gastroenteritis outbreaks in institutions and public hospitals

Giardiasis, except asymptomatic cases


* Group A Streptococcal infections, invasive

Group B Streptococcal disease, neonatal

* Haemophilus influenzae disease, all types, invasive

* Hantavirus Pulmonary Syndrome

* Hemorrhagic fevers, including: (Ebola virus disease, Marburg virus disease. Lassa fever and other viral causes)

* Hepatitis A, viral

Hepatitis B, viral

Hepatitis C, viral

HIV infection





Lyme Disease

* Measles

* Meningitis, acute, including: bacterial, viral and other

* Meningococcal disease, invasive

* Middle East Respiratory Syndrome (MERS)

Multisystem Inflammatory Syndrome in Children (MIS-C), complication of coronavirus disease (COVID-19, SARS-CoV-2)

* Mumps 

Ophthalmia neonatorum 

* Paralytic Shellfish Poisoning

* Paratyphoid Fever

* Pertussis (Whooping Cough)

* Plague

Pneumococcal disease, invasive

* Poliomyelitis, acute


Q fever

* Rabies

* Respiratory outbreaks in institutions and public hospitals

* Rubella

Rubella, congenital syndrome


* Severe Acute Respiratory Syndrome (SARS)

* Shigellosis

* Smallpox


* Tetanus



* Tularemia

* Typhoid Fever 

* Verotoxin-producing E. coli infections including Hemolytic Uremic Syndrome (HUS)

West Nile Virus illness


Contact Us