Pick the perilous pathogen at play in this febrile patient

Ned, a 52-year-old scientist, requests a telehealth consultation. He reports that, for the past few days, he has had generalised myalgia, headaches, chills and has felt feverish.
The symptoms developed after a work visit to a regional area in Central Queensland.
He reports that he saw a lot of ticks on his co-workers’ clothes, but he used insecticide and wore long clothing and did not note any bites or skin eruptions.
He has no respiratory, gastrointestinal or urinary symptoms. At-home COVID-19 and influenza RATs are negative.