# Increased Recognition of Human Anaplasmosis, Ontario, Canada, 2021

## TL;DR

This paper reports a cluster of 16 probable human anaplasmosis cases in Ontario, Canada, highlighting the need for prompt treatment to avoid severe illness.

## Contribution

The paper presents an unusual cluster of human anaplasmosis cases in Ontario, contributing to the understanding of its geographic and temporal patterns.

## Key findings

- A cluster of 16 probable human anaplasmosis cases was identified in Ontario during June–August 2021.
- The cases highlight the importance of timely diagnosis and treatment to prevent clinical decompensation.

## Abstract

Human granulocytic anaplasmosis is a tickborne infection characterized by fever, thrombocytopenia, leukopenia, transaminitis, or a combination of those. Treatment must be prompt and appropriately targeted to prevent clinical decompensation. We discuss an unusual cluster of 16 probable cases in Ontario, Canada, during June–August 2021.