Infectious Diseases - Statistics in Niagara

Infectious diseases can be spread from one person to another, directly or indirectly, through fluid exchange, exposure to vectors, or from the environment. Niagara Region Public Health receives information about and follows up all reportable diseases as identified in Ontario Regulation 559/91 and under the Ontario Health Protection and Promotion Act.

This section contains incidence data for Niagara region related to select infectious diseases.

For more information, see infectious disease trends in Ontario.

Direct contact and respiratory infections Top of Page

Infectious diseases that can be spread by touching people or objects that have germs on them and diseases that can be spread from a sick person's cough or sneeze.

Diseases Number of cases Jan. - March 2023 Number of cases April - June 2023 Number of cases July - Sept. 2023 Number of cases Oct. - Dec. 2023 Year-to-Date 2023Comparison to 3-Year Average in Niagara
Acute Flaccid Paralysis 0 0     0 ⇔
COVID-19 2,263 522 860   3,645 Not applicable
Encephalitis / Meningitis <5 <5 <5   5 ⇔
Group A Streptococcal disease, invasive 24 27 15   66 ⇧
Group B Streptococcal disease, neonatal 0 0 0   0 ⇔
Influenza A, laboratory confirmed 64 <5 5   72 ⇔
Influenza B, laboratory confirmed 29 105 <5   134 ⇧
Legionellosis 5 <5 6   12 ⇔
Meningococcal Disease, invasive 0 0 0   0 ⇔
Tuberculosis, active <5 7 <5   10 ⇔

Source: Integrated Public Health Information System [2023].

3-year average based on 2020-2022 data, rounded to nearest whole number

All reportable disease data are stored in and retrieved from the provincially mandated Integrated Public Health Information System (iPHIS) and the Case and Contact Management System (CCM) for COVID-19 cases. Only confirmed cases are provided.

Infectious disease data may be underreported due to testing availability, case and contact management guidelines and delays in data entry.

Food, waterborne and enteric infections Top of Page

Infectious diseases that can be spread by eating or drinking contaminated food or water and not cleaning your hands.

Diseases Number of cases Jan. - March 2023 Number of cases April - June 2023 Number of cases July - Sept. 2023 Number of cases Oct. - Dec. 2023 Year-to-Date 2023Comparison to 3-Year Average in Niagara
Amebiasis <5 0 0   <5 ⇔
Campylobacter Enteritis 15 25 38   78 ⇔
Cryptosporidiosis 5 <5 13   19 ⇔
Cyclosporiasis <5 6 <5   11 ⇔
Giardiasis 11 6 6   23 ⇔
Hepatitis A 0 <5 0   <5 ⇔
Listeriosis <5 <5 <5   5 ⇔
Paratyphoid Fever <5 0 0   <5 ⇔
Salmonellosis 22 14 14   50 ⇔
Shigellosis 0 <5 0   <5 ⇔
Typhoid fever 0 0     0 ⇔
Trichinosis 0 0     0 ⇔
Verotoxin-Producing E. coli Including HUS) 0 0 <5   <5 ⇔ 
Yersiniosis <5 <5 <5   <5 ⇔

Source: Integrated Public Health Information System [2023].

3-year average based on 2020-2022 data, rounded to nearest whole number

All reportable disease data are stored in and retrieved from the provincially mandated Integrated Public Health Information System. Only confirmed cases are provided.

Infectious disease data may be underreported due to testing availability, case and contact management guidelines and delays in data entry.

Sexually transmitted and bloodborne infections Top of Page

Infections that can be spread through sexual contact and exposure to infected fluids, such as semen, vaginal fluid and blood.

Diseases Number of cases Jan. - March 2023 Number of cases April - June 2023 Number of cases July - Sept. 2023 Number of cases Oct. - Dec. 2023 Year-to-Date 2023Comparison to 3-Year Average in Niagara
AIDS 0 <5 0   <5 ⇔
HIV 26 6 <5   35 ⇔
Chlamydia 373 337 338   1,048 ⇔
Gonorrhea 93 73 66   232 ⇔
Hepatitis C 25 31 31   87 ⇔
Syphilis 90 38 31   159 ⇔

Source: Integrated Public Health Information System [2023].

3-year average based on 2020-2022 data, rounded to nearest whole number

All reportable disease data are stored in and retrieved from the provincially mandated Integrated Public Health Information System. Only confirmed cases are provided.

Infectious disease data may be underreported due to testing availability, case and contact management guidelines and delays in data entry.

Vaccine preventable infections Top of Page

Infectious diseases that can be controlled and/or avoided by getting recommended immunizations.

Diseases Number of cases Jan. - March 2023 Number of cases April - June 2023 Number of cases July - Sept. 2023 Number of cases Oct. - Dec. 2023 Year-to-Date 2023Comparison to 3-Year Average in Niagara
Hepatitis B 13 7     24 ⇔
Diphtheria 0 0     0 ⇔
Chickenpox (Varicella) <5 <5 <5   7 ⇧
Measles 0 0 0   0 ⇔
Mumps 0 0 0   0 ⇔
Pertussis (Whooping Cough) 0 0 0   0 ⇔
Rubella 0 0 0   0 ⇔
Streptococcus pneumoniae, invasive 10 17 8   35 ⇔
Tetanus 0 0 0   0 ⇔

Source: Integrated Public Health Information System [2023].

3-year average based on 2020-2022 data, rounded to nearest whole number

All reportable disease data are stored in and retrieved from the provincially mandated Integrated Public Health Information System. Only confirmed cases are provided.

Infectious disease data may be underreported due to testing availability, case and contact management guidelines and delays in data entry.

Vectorborne and zoonotic infections Top of Page

Infectious diseases that can be spread from infected insects or animals.

Diseases Number of cases Jan. - March 2023 Number of cases April - June 2023 Number of cases July - Sept. 2023 Number of cases Oct. - Dec. 2023 Year-to-Date 2023Comparison to 3-Year Average in Niagara
Brucellosis 0 0     0 ⇔ 
Lyme <5 16 19   37 ⇔
West Nile Virus 0 0 8   8 ⇧

Source: Integrated Public Health Information System [2023].

3-year average based on 2020-2022 data, rounded to nearest whole number

All reportable disease data are stored in and retrieved from the provincially mandated Integrated Public Health Information System. Only confirmed cases are provided.

Infectious disease data may be underreported due to testing availability, case and contact management guidelines and delays in data entry.

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