Think Like a Doctor: The Tired Gardener Solved!

On Thursday, we challenged Well readers to solve the case of a previously healthy 67-year-old gardener who abandoned his garden one summer, alarming his wife and adult children. For weeks this vibrant and energetic man had been the last one out of bed — something his family had never seen before. And his days were interrupted each afternoon with a fever that left him shaking and pale. More than 300 readers suggested diagnoses for this classic presentation of an unusual disease, and a couple dozen of you nailed it.

The correct diagnosis is…

Babesiosis

The first person to identify this unusual infection was Dr. Paige Szymanowski, a resident in her second year of training in internal medicine at the Beth Israel Deaconess Medical Center in Boston. She said she recognized the pattern of a fever with a low blood count, low platelet count and evidence of liver injury. Dr. Szymanowski hasn’t made up her mind what kind of doctor she’s going to be, but she is thinking of subspecializing in infectious diseases. I think she shows real promise in this area. Well done!

The Diagnosis

Babesiosis is caused by the parasite Babesia microti, a protozoa. It is usually transmitted by Ixodes scapularis, better known as the deer tick, the same small arthropod that transmits Lyme disease. Sometimes the two diseases occur together, passed on in the same bite. The disease can also be spread through blood transfusions from an infected donor.

Babesiosis is rare and occurs primarily in the Northeast and Upper Midwest — Minnesota and Wisconsin — regions of the United States. In healthy people it often causes no symptoms. However, those who are over 65 or who have some type of immune suppression – because of a chronic disease or medication – or those who don’t have a spleen are more likely to develop symptoms and can become quite ill or even die from this infection.

Easy to Miss

Babesiosis is difficult to diagnose, and the diagnosis is often overlooked, even in areas where…

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