Why is the mouse spider harmful to humans?

The mouse spider, native to Australia, is considered harmful to humans primarily due to its venom, which can cause severe pain, swelling, and other systemic symptoms. While bites are rare and fatalities are extremely uncommon, the venom can lead to serious reactions in sensitive individuals. Prompt medical attention is recommended in the event of a bite, as antivenom is available for more severe cases. Overall, caution should be exercised when encountering this spider.