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Latest Veterinary Need-2-Know (N2K) Update

The Jan-Apr 2026 update includes:
OAHN spring survey and lab data; Rabies update: Be bat ready, and travel aware!; Keep a lookout! Summer 2026 hazards; Anti-parasitics table: 2026 update; Survey: Antibiotic Prescribing Practices; Antiviral stewardship: FIP drugs … Read More >

Vaccination Timing and Intervals for Dogs and Cats

Available to vets and RVTs that are logged into OAHN.ca. This information summary and references are intended to assist veterinarians with making vaccination decisions for patients based on what evidence is and is not currently available, their professional judgement, and individual considerations for patients and clients within an established veterinarian-client-patient relationship (VCPR). … Read More >

Disease Surveillance

Seasonal Need-2-Know Updates
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03 Jun , 2026

Private: Veterinary Need-2-Know (N2K) Update – Jan-Apr 2026

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28 Jan , 2026

Private: Veterinary Need-2-Know (N2K) Update – Sep-Dec 2025

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02 Oct , 2025

Private: Veterinary Need-2-Know (N2K) Update – May-Aug 2025

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02 Jun , 2025

Private: Veterinary Need-2-Know (N2K) Update – Jan-Apr 2025

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29 Jan , 2025

Private: Veterinary Need-2-Know (N2K) Update – Sep-Dec 2024

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26 Sep , 2024

Private: Veterinary Need-2-Know (N2K) Update – May-Aug 2024

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03 Jun , 2024

Private: Veterinary Need-2-Know (N2K) Update – Jan-Apr 2024

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05 Feb , 2024

Private: Veterinary Need-2-Know (N2K) Update – Sep-Dec 2023

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02 Oct , 2023

Private: Veterinary Need-2-Know (N2K) Update – May-Aug 2023

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05 Jun , 2023

Private: Veterinary Need-2-Know (N2K) Update – Jan-Apr 2023

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27 Jan , 2023

Private: Veterinary Need-2-Know (N2K) Update – Q4 2022

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01 Nov , 2022

Private: Veterinary Need-2-Know (N2K) Update – Q3 2022

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28 Jul , 2022

Private: Veterinary Need-2-Know (N2K) Update – CA Q2 2022

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06 May , 2022

Private: Veterinary Need-2-Know (N2K) Update – CA Q1 2022

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02 Feb , 2022

Private: Veterinary Need-2-Know (N2K) Update – CA Q4 2021

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02 Nov , 2021

Private: Veterinary Need-2-Know (N2K) Update – CA Q3 2021

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04 Aug , 2021

Private: Veterinary Need-2-Know (N2K) Update – CA Q2 2021

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30 Apr , 2021

Private: Veterinary Need-2-Know (N2K) Update – CA Q1 2021

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27 Jan , 2021

Private: Veterinary Need-2-Know (N2K) Update – CA Q4 2020

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03 Nov , 2020

Private: Veterinary Need-2-Know (N2K) Update – CA Q3 2020

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29 Jul , 2020

Private: Veterinary Need-2-Know (N2K) Update – CA Q2 2020

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29 Apr , 2020

Special Edition Bulletin – CA Q1 2020

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27 Jan , 2023

Private: Clinical Impressions – CA Q4 2019

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28 Jan , 2020

Private: Veterinary Report – CA Q4 2019

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04 Nov , 2019

Private: Veterinary Report – CA Q3 2019

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02 Aug , 2019

Private: Veterinary Report – CA Q2 2019

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14 May , 2019

Private: Veterinary Report – CA Q1 2019

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01 Feb , 2019

Private: Veterinary Report – CA Q4 2018

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09 Nov , 2018

Private: Veterinary Report – CA Q3 2018

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31 Jul , 2018

Private: Veterinary Report – CA Q2 2018

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04 May , 2018

Private: Veterinary Report – CA Q1 2018

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29 Jan , 2018

Private: Veterinary Report – CA Q4 2017

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07 Nov , 2017

Private: Veterinary Report – CA Q3 2017

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18 Sep , 2017

Private: Veterinary Report – CA Q2 2017

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08 May , 2017

Private: Veterinary Report – CA Q1 2017

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06 Feb , 2017

Private: Veterinary Report – CA Q4 2016

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10 Nov , 2016

Private: Veterinary Report – CA Q3 2016

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03 Aug , 2016

Private: Veterinary Report – CA Q2 2016

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10 May , 2016

Private: Vet Report – CA Q1 2016

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17 Feb , 2016

Private: Vet Report – CA Q4 2015

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23 Nov , 2015

Private: Vet Report – CA Q3 2015

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Clinical Impressions Survey Data

Clinical impressions survey results are available upon request by emailing oahn@uoguelph.ca.  Noteworthy information from each survey is typically summarized in the seasonal companion animal N2K update.  To receive the link to each survey (every 4 months) sign up here or email oahn@uoguelph.ca.  Your input as a veterinary professional practicing in Ontario is greatly appreciated!

Laboratory Data

26 Jan , 2026

Companion Animal Parasite Council: Cat and Dog Graphs (July 2020 – August 2026)

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26 Apr , 2025

Companion Animal Lab Data

The companion animal network reviewed a summary of selected infectious-disease related data from the AHL on an annual basis, from 2016-2025. The applicable spreadsheets can be made available upon request to OAHN network members (veterinarians or RVTs) by contacting oahn@uoguelph.ca.

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Annual Reports and Updates
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15 Dec , 2025

2025 OAHN Public Health Update

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09 Mar , 2020

Annual OAHN Public Health Updates

Created especially for public health professionals in Ontario, highlighting pertinent topics the OAHN companion animal network’s reports.

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26 Sep , 2024

2024 OAHN Public Health Update

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09 Mar , 2020

Annual OAHN Public Health Updates

Created especially for public health professionals in Ontario, highlighting pertinent topics the OAHN companion animal network’s reports.

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01 Sep , 2023

2023 OAHN Public Health Update

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09 Mar , 2020

Annual OAHN Public Health Updates

Created especially for public health professionals in Ontario, highlighting pertinent topics the OAHN companion animal network’s reports.

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16 Sep , 2022

2022 OAHN Public Health Update

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09 Mar , 2020

Annual OAHN Public Health Updates

Created especially for public health professionals in Ontario, highlighting pertinent topics the OAHN companion animal network’s reports.

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02 Sep , 2021

2021 OAHN Public Health Update

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09 Mar , 2020

Annual OAHN Public Health Updates

Created especially for public health professionals in Ontario, highlighting pertinent topics the OAHN companion animal network’s reports.

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25 Nov , 2020

2020 OAHN Public Health Report

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09 Mar , 2020

Annual OAHN Public Health Updates

Created especially for public health professionals in Ontario, highlighting pertinent topics the OAHN companion animal network’s reports.

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Annual OAHN Public Health Updates

Created especially for public health professionals in Ontario, highlighting pertinent topics the OAHN companion animal network’s reports.

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10 Feb , 2020

Ontario Animal Health Network Annual Update

The annual OAHN Update reviews the past year at a glance, Information sharing initiatives, Disease investigations, and our OAHN network members from all of the OAHN networks. Take a few moments to read through and review how the OAHN disease surveillance networks worked to improve animal health in Ontario. OAHN Annual Update 2018-2019 OAHN L’année …

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09 Mar , 2020

Annual OAHN Public Health Updates

Created especially for public health professionals in Ontario, highlighting pertinent topics the OAHN companion animal network’s reports.

Read More >

24 Apr , 2018

Staying Ahead of the Curve Magazine: The Disease Surveillance Plan 2013-2018

Detailing what the DSP and OAHN completed from 2013-2018, including summaries by network, research projects, equipment purchased, tests developed, and much more.

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Resources

Clinical Resources
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02 Jun , 2025

Antimicrobials for Use in Dogs

This table provides a summary of current systemic antimicrobial treatment guidelines for common clinical conditions in dogs as per the CPHAZ guidelines available through the FirstLine app.

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01 Jun , 2025

Antimicrobial Categorization for Dogs and Cats

This table shows the categorization of antimicrobial drugs commonly used and approved for use in dogs and cats in Canada according to the World Health Organization List of Medically Important Antimicrobials (2024).

Read More >

27 May , 2024

Private: Factsheet: Drug-Resistant Hookworms in Dogs

This info sheet covers: Importance, resistance vs larval leak, the FECRT & interpretation, environmental considerations, treatment, and Additional resources

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14 Dec , 2020

Antimicrobial Stewardship Resources

A list of helpful resources for educating veterinary staff about AM stewardship, as well as developing and sustaining a clinic AM stewardship program (ASP).

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18 Feb , 2026

Anti-Parasitics Table for Cats and Dogs 2026

A table breaking down the different anti-parasitics for dogs and cats, outlining what species they are used for and what type of parasite they treat. The OAHN Companion Animal Network has created a simplified table for pet owners, and a veterinary version.

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Private: Anti-Parasitics Table for Cats and Dogs for Veterinarians 2026

A table breaking down the different anti-parasitics for dogs and cats, outlining what species they are used for and what type of parasite they treat.

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04 Aug , 2021

OAHN Companion Animal Research Project: Prevalence of seroconversion to SARS-CoV-2 among dogs, cats and ferrets in close contact with humans with confirmed or probable COVID-19

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23 Mar , 2020

Species-Specific COVID-19 Resources- ARCHIVED 31-Dec-2021

Below is an ARCHIVED list of resources for veterinary staff and animal owners related to the COVID-19 pandemic. This list of resources is no longer being updated as of December 31, 2021.  Please contact oahn@uoguelph.ca if you find ay links that are broken or no longer valid and should be removed. Companion Animal: OAHN COVID-19 Mini-Podcasts for …

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16 Mar , 2020

COVID-19 Related Resources for Veterinarians – ARCHIVED 31-Dec-2021

OAHN has compiled a list of resources for veterinary staff and animal owners related to the COVID-19 pandemic.

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06 Mar , 2019

Infographic: Laboratory Submissions: Naughty Vs. Nice

10 tips to help you get the most out of your diagnostic laboratory dollars.

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Infectious Disease Information and Graphics

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26 Jan , 2022

Infosheet: Blastomycosis for Dog Owners

To download a PDF of this document, please click here: https://www.oahn.ca/wp-content/uploads/2022/02/Blasto-Infosheet-Format-vF.pdf What is blastomycosis? Blastomycosis is an infection caused by a fungus called Blastomyces dermatitidis.  It most commonly infects the lungs, but the fungus can spread from there to many other organs in the body as well.  The fungus can also rarely infect open wounds. Blastomyces …

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10 May , 2019

Fact Sheet: Brucella canis

A summary of what practitioners need to know regarding clinical signs, transmission, diagnosis, and prevention of Brucella canis.

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24 Feb , 2026

OAHN Companion Animal Project: Haplotyping of Echinoccus multicularis in domestic, captive and wildlife species in Ontario (in progress)

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03 Jan , 2017

Infographic: Emerging Risk: Echinococcus multilocularis in Ontario – 2019 UPDATE

Learn about this emerging disease in Ontario, how it is spread, and what owners and vets can do.

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22 Jan , 2016

Resources for Echinococcos multilocularis

Key facts, prevention, EM in Ontario and a handout for pet owners.

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22 Jan , 2020

Leptospirosis diagnostics

Leptospirosis testing recommendations and a diagnostic algorithm for companion animals

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04 Jul , 2016

Infographic: Brush up on Managing Lepto Patients

Help keep veterinary staff and clients safe by following these steps when dealing with leptospiroris.

Read More >
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01 Aug , 2026

Infographic: Ticks and Lyme Disease in Ontario – 2026 UPDATE

An infographic and references for veterinarians on ticks and Lyme disease in Ontario.

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27 Jul , 2022

Tick Checklist for Dog Owners

Find out what to do if you find a tick on your pet.

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03 May , 2022

Infosheet: Paragonimus kellicotti for veterinarians

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22 Jun , 2026

Private: Vaccination Timing and Intervals for Dogs and Cats

These resources are intended to assist veterinarians with making vaccination decisions for patients presented for revaccination outside of the label directions, or when no specific revaccination interval is provided, within an established veterinarian-client-patient relationship (VCPR).

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26 Aug , 2025

Bat Contact Guide: High Risk vs No Risk

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13 Aug , 2024

Need-2-Know: Bats in Ontario

A primer on bats in Ontario, and what to do if you encounter a live bat indoors.

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12 Apr , 2023

OAHN Companion Animal Research Project: Rabies titres in imported dogs

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16 Feb , 2023

Guide d’évaluation des risques liés à la rage (Rabies Risk Assessment Flowchart – French)

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09 Jan , 2023

*VIDEO* Need to Know: Rabies in Pets

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OAHN Companion Animal Research Project: Whiteboard Rabies Video

Details, and the educational rabies video produced by this project.

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15 Jul , 2022

Veterinary Checklist: Dogs imported from Ukraine

To download a PDF of this document, please click here: https://www.oahn.ca/wp-content/uploads/2022/07/OAHN-Companion-Animal-Ukraininian-Dog-Infosheet-FINAL-July-15-2022.pdf

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24 May , 2022

Rabies Risk Assessment Flowchart

View and download this veterinary handout.

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10 May , 2021

The Rabies Reporter

The Rabies Reporter is a scientific newsletter about current issues in rabies research and control.

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27 May , 2019

Private: Rabies Resource Page for Veterinarians

Find videos on how to obtain rabies samples from small and large mammals, as well as the rabies risk assessment flow chart.

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21 Jan , 2019

Private: MNRF Oral Rabies Vaccine Bait Infographic

A great visual resource for veterinarians regarding oral rabies vaccine baits in Ontario, courtesy of the Ministry of Natural Resources and Forestry. MNRF Oral Rabies Vaccine Bait Infographic

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15 Dec , 2015

OAVT Rabies Tips for Small Animal Hospitals

Find out more about rabies response program.

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30 Apr , 2024

Infosheet: Raw Meat Diets for Pet Owners

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28 Jul , 2017

Raw Food Diet Resources

Links to podcasts, and information on raw food, and infectious diseases.

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01 Aug , 2026

Infographic: Ticks and Lyme Disease in Ontario – 2026 UPDATE

An infographic and references for veterinarians on ticks and Lyme disease in Ontario.

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20 Jun , 2022

Infographic: Must Know Facts About Canine Distemper

What it is, how it spreads, how to protect your pets, and more.

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26 Jan , 2022

Infosheet: Blastomycosis for Dog Owners

To download a PDF of this document, please click here: https://www.oahn.ca/wp-content/uploads/2022/02/Blasto-Infosheet-Format-vF.pdf What is blastomycosis? Blastomycosis is an infection caused by a fungus called Blastomyces dermatitidis.  It most commonly infects the lungs, but the fungus can spread from there to many other organs in the body as well.  The fungus can also rarely infect open wounds. Blastomyces …

Read More >

22 Jan , 2020

Leptospirosis diagnostics

Leptospirosis testing recommendations and a diagnostic algorithm for companion animals

Read More >

03 Jan , 2017

Infographic: Emerging Risk: Echinococcus multilocularis in Ontario – 2019 UPDATE

Learn about this emerging disease in Ontario, how it is spread, and what owners and vets can do.

Read More >

04 Jul , 2016

Infographic: Brush up on Managing Lepto Patients

Help keep veterinary staff and clients safe by following these steps when dealing with leptospiroris.

Read More >
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Antimicrobial Stewardship Information and Graphics

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22 Jul , 2019

Private: Infographic: Bacterial Cystitis in Cats vs Dogs

Find out the differences and similarities of bacterial cystitis in cats and dogs.

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04 Nov , 2019

Private: Infographic: Canine Infectious Respiratory Disease Complex

Find out about CIRDC, treatment, and when to use microbials.

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06 Mar , 2019

Private: Infographic: Feline Upper Respiratory Tract Disease and Antibiotics

Infographic to guide your use of antibiotics when it comes to respiratory tract disease.

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26 Aug , 2025

Bat Contact Guide: High Risk vs No Risk

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02 Jun , 2025

Antimicrobials for Use in Dogs

This table provides a summary of current systemic antimicrobial treatment guidelines for common clinical conditions in dogs as per the CPHAZ guidelines available through the FirstLine app.

Read More >

01 Jun , 2025

Antimicrobial Categorization for Dogs and Cats

This table shows the categorization of antimicrobial drugs commonly used and approved for use in dogs and cats in Canada according to the World Health Organization List of Medically Important Antimicrobials (2024).

Read More >

19 Dec , 2024

Need-2-Know: Parvovirus for dog owners

A high-level factsheet for dog owners and community members in high-risk areas and scenarios to help raise awareness about canine parvovirus, how serious it can be, and basic prevention and control measures, with emphasis on the importance of vaccination.

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27 May , 2024

Private: Factsheet: Drug-Resistant Hookworms in Dogs

This info sheet covers: Importance, resistance vs larval leak, the FECRT & interpretation, environmental considerations, treatment, and Additional resources

Read More >

27 Jul , 2022

Tick Checklist for Dog Owners

Find out what to do if you find a tick on your pet.

Read More >

02 Jan , 2020

Infection Prevention and Control (IPC) Best Practices for Small Animal Veterinary Clinics

Newly updated Infection Prevention and Control Best Practices for Small Animal Veterinary Clinics are now available, and we’d love to hear how you implement them in your clinics!

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03 Oct , 2016

Infographic: Using the Best Medicine & Reducing Antibiotic Use

Tips on how to reduce antibiotic use in your veterinary practice.

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06 May , 2019

Private: Infographic: Itchy Dogs: Topical Treatments & Culture-Critical Cases

Learn about superficial bacterial folliculitis, sometimes called superficial pyoderma.

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28 Apr , 2023

Private: Infographics: Acute Diarrhea and Giardia in Cats and Dogs

Two infographics illustrating what vets need to know when it comes to giardia or acute diarrhea in cats and dogs.

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04 Nov , 2019

Private: Infographic: Canine Infectious Respiratory Disease Complex

Find out about CIRDC, treatment, and when to use microbials.

Read More >

22 Jul , 2019

Private: Infographic: Bacterial Cystitis in Cats vs Dogs

Find out the differences and similarities of bacterial cystitis in cats and dogs.

Read More >

06 May , 2019

Private: Infographic: Itchy Dogs: Topical Treatments & Culture-Critical Cases

Learn about superficial bacterial folliculitis, sometimes called superficial pyoderma.

Read More >

06 Mar , 2019

Private: Infographic: Feline Upper Respiratory Tract Disease and Antibiotics

Infographic to guide your use of antibiotics when it comes to respiratory tract disease.

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03 Oct , 2016

Infographic: Using the Best Medicine & Reducing Antibiotic Use

Tips on how to reduce antibiotic use in your veterinary practice.

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Podcasts

15 Feb , 2017

Companion Animal Podcasts

To access all OAHN Companion Animal Podcasts, click here.

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Network Projects

19 Jun , 2026

OAHN Companion Animal Project: Surveillance of Rhipicephalus spp. and Haemaphysalis longicornis in dogs in Ontario (in progress)

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24 Feb , 2026

OAHN Companion Animal Project: Haplotyping of Echinoccus multicularis in domestic, captive and wildlife species in Ontario (in progress)

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OAHN Companion Animal Project: Rickettsia rickettsii seroprevalence in dogs in an area of suspected Rocky Mountain Spotted Fever emergence (in progress)

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17 Apr , 2024

OAHN Wildlife Project: Pilot Surveillance for Avian Influenza Virus (AIV) in Feral Cats (in progress)

Read More >

12 Apr , 2023

OAHN Companion Animal Research Project: Rabies titres in imported dogs

Read More >

09 Jan , 2023

OAHN Companion Animal Research Project: Whiteboard Rabies Video

Details, and the educational rabies video produced by this project.

Read More >

31 Oct , 2022

Rabbit Hemorrhagic Disease Surveillance Project

The OAHN wildlife and companion animal networks have also received approval for a joint project to provide subsidized testing for cases in deceased domestic rabbits that meet certain high-risk criteria, as well as testing for high-risk cases from rehab facilities.  It is anticipated that submissions under this surveillance project will be accepted beginning in November 2022.  Watch …

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04 Aug , 2021

OAHN Companion Animal Research Project: Prevalence of seroconversion to SARS-CoV-2 among dogs, cats and ferrets in close contact with humans with confirmed or probable COVID-19

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03 Jan , 2020

OAHN Companion Animal Research Project: Update of Infection Prevention and Control Best Practices for Small Animal Veterinary Clinics

We have created a report on best practices for infection prevention and control in small animal veterinary clinics

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18 Nov , 2019

OAHN Companion Animal Research Project: Prevalence of selected pathogens in dogs recently imported from Asia

This project is currently in-progress. Check out the poster detailing this project.

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OAHN Companion Animal Research Project: Brucella canis in commercial dog breeding kennels in southern Ontario

Poster, report summary and factsheets from OAHN Companion animal network’s research investigation into Brucella canis in commercial dog-breeding kennels in Ontario

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23 May , 2018

OAHN Companion Animal Project: Companion animal infographics

Executive summary, full report, and poster for the OAHN Companion Animal Infographic project.

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23 Mar , 2018

Grad Student Feature: Jonathon Kotwa and Echinococcus multilocularis in Wild Canids

Jonathon D. Kotwa completed his PhD in the Department of Pathobiology at the University of Guelph.

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Team Members

Dr. Maureen Anderson

Co-lead

OMAFRA

Dr. Emma Webster

Co-lead

Private Practitioner

Dr. Hailey Bertrand

Private Practitioner

Northern ON

Dr. Emily Brouwer

Pathologist

Animal Health Laboratory

Dr. Julie Calvert

Private Practitioner

Eastern ON

Dr. Allison Collier

Faculty Clinician

Ontario Veterinary College

Dr. Donia Eino

Private Practitioner

GTA

Dr. Kris Ruotsalo

Pathologist

Animal Health Laboratory

Dr. Scott Weese

Professor

Ontario Veterinary College

Dr. Hannah Golightly

Epidemiologist

OMAFRA

Dr. Tanya Rossi

OAHN Coordinator

Animal Health Laboratory