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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.

DiseasesNumber of cases Jan. - March 2021Number of cases April - June 2021 Number of cases July - Sept. 2021Number of cases Oct. - Dec. 2021Year-to-Date 2021Comparison to 3-Year Average in Niagara
Acute Flaccid Paralysis 0 0 0 0 0 ⇔
COVID-19 5,355 6,125 1,476 7,584 20,540 Not applicable
Encephalitis / Meningitis <5 0 <5 0 5 ⇔
Group A Streptococcal disease, invasive 9 12 11 28 60 ⇔
Group B Streptococcal disease, neonatal <5 0 <5 <5 <5 ⇔
Influenza A, laboratory confirmed 0 0 <5 <5 <5 ⇔
Influenza B, laboratory confirmed 0 0 0 0 0 ⇔
Legionellosis 0 0 7 5 12 ⇔
Meningococcal Disease, invasive 0 0 0 0 0 ⇔
Tuberculosis, active 0 <5 <5 <5 7 ⇧

Source: Integrated Public Health Information System [2021].

3-year average based on 2018-2020 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.

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.

DiseasesNumber of cases Jan. - March 2021Number of cases April - June 2021 Number of cases July - Sept. 2021Number of cases Oct. - Dec. 2021Year-to-Date 2021Comparison to 3-Year Average in Niagara
Amebiasis 0 0 0 0 0 ⇔
Campylobacter Enteritis 6 17 43 16 82 ⇔
Cryptosporidiosis <5 <5 12 <5 17 ⇔
Cyclosporiasis 0 <5 <5 0 6 ⇔
Giardiasis 0 <5 7 <5 13 ⇔
Hepatitis A 0 0 <5 0 <5 ⇔
Listeriosis 0 0 <5 0 <5 ⇔
Paratyphoid Fever 0 0 0 0 0 ⇔
Salmonellosis 5 7 10 9 31 ⇔
Shigellosis <5 0 <5 0 <5 ⇔
Typhoid fever 0 <5 0 0 <5 ⇔
Trichinosis 0 0 0 0 0 ⇔
Verotoxin-Producing E. coli Including HUS) 0 <5 <5 <5 6 ⇔ 
Yersiniosis 5 <5 <5 0 9 ⇔

Source: Integrated Public Health Information System [2021].

3-year average based on 2018-2020 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.

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.

DiseasesNumber of cases Jan. - March 2021Number of cases April - June 2021 Number of cases July - Sept. 2021Number of cases Oct. - Dec. 2021Year-to-Date 2021Comparison to 3-Year Average in Niagara
AIDS 0 0 <5 <5 <5 ⇧
HIV <5 <5 6 13 25 ⇧
Chlamydia 262 295 298 291 1,146 ⇔
Gonorrhea 91 84 151 102 428 ⇔
Hepatitis C 54 50  46 46 196 ⇔
Syphilis 27 36 50 66 179 ⇧

Source: Integrated Public Health Information System [2021].

3-year average based on 2018-2020 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.

Vaccine preventable infections Top of Page

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

DiseasesNumber of cases Jan. - March 2021Number of cases April - June 2021 Number of cases July - Sept. 2021Number of cases Oct. - Dec. 2021Year-to-Date 2021Comparison to 3-Year Average in Niagara
Hepatitis B <5 <5 <5 <5 8 ⇔
Diphtheria 0 0 0 0 0 ⇔
Chickenpox (Varicella) 0 <5 0 <5 5 ⇧
Measles 0 0 0 0 0 ⇔
Mumps 0 0 0 0 0 ⇔
Pertussis (Whooping Cough) 0 0 0 0 0 ⇔
Rubella 0 0 0 0 0 ⇔
Streptococcus pneumoniae, invasive <5 8 <5 22 38 ⇧
Tetanus 0 0 0 0 0 ⇔

Source: Integrated Public Health Information System [2021].

3-year average based on 2018-2020 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.

Vectorborne and zoonotic infections Top of Page

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

DiseasesNumber of cases Jan. - March 2021Number of cases April - June 2021 Number of cases July - Sept. 2021Number of cases Oct. - Dec. 2021Year-to-Date 2021Comparison to 3-Year Average in Niagara
Brucellosis 0 0 0 0 0 ⇔ 
Lyme 0 13 19 4 36 ⇧
West Nile Virus 0 0 <5 0 <5 ⇔

Source: Integrated Public Health Information System [2021].

3-year average based on 2018-2020 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.

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