white blood cells

Pus: An Unmistakable Sign of Infection

You had a fall and suffered the tell-tale scrape on your knee. Within a week, it’s filled in with green pus. Don’t worry, there’s no alien at play here. Pus is a sign that your body’s defense system has kicked in. All you need to do is figure out what … Read More

“Normal” Urine Color: 50 Shades of Yellow

Pretty much everyone knows his or her normal urine color (or subtle range of urine colors). If the shade changes a great deal, however, we can become a little alarmed.

But hold on. While urine color is a centuries-old diagnostic tool, many shades of yellow can be perfectly normal, even if … Read More

Joint Inflammation Is Easy to Recognize, But Difficult to Treat

Joint inflammation is easily recognizable—it's a condition that affects 80 percent of the world’s population. You’ll know inflammation by its symptoms: pain, warmth, redness, swelling, and perhaps loss of joint function. The symptoms are uncomfortable but manageable with rest, ice, compression, elevation—the classic "RICE" treatment—and a non-steroidal … Read More

Ehrlichiosis: Another Tick-Borne Disease on the Rise

What is ehrlichiosis? It's a bacterial disease of the white blood cells. Spread by ticks, ehrlichiosis affects all mammals, including people. Two bacteria in particular are known to cause the disease—Ehrlichia chaffeensis and Ehrlichia ewingii. A third, Ehrlichia muris, is being evaluated as another cause. According to the U.S. National … Read More

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