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1 .This is Scientific American's 60-Second Health. I'm Katherine Harmon. Got a minute?
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2 .Cleaning your cat's litter box can be annoying.
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3 .And it might actually pose a health risk.
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4 .The reason is a microscopic organism called Toxoplasma gondii.
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5 .This protozoan has been linked in humans to congenital birth defects and nervous system damage.
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6 .There's evidence that it's also tied to an increased risk for psychiatric illnesses, rheumatoid arthritis and other conditions.
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7 .It reproduces in cats, which shed parasites in their feces.
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8 .These oocysts can then be picked up by birds, mice or people.
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9 .Cats produce 1.2 million metric tons of waste outdoors each year in the U.S.
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10 .And about 1 percent of cats are likely shedding Toxo at any given time.
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11 .Backyard surveys have found up to 400 Toxo oocysts per square foot.
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12 .They can survive for more than a year and a half in the soil.
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13 .And just one, which can be accidentally inhaled or ingested could start an infection.
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14 .These stats are in a report in the journal Trends in Parasitology.
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15 .Indoor-only cats are less likely to pick up the parasite.
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16 .Nevertheless, best to be cautious when around the garden box, sandbox and litter box.
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17 .Thanks for the minute, for Scientific American's 60-Second Health. I'm Katherine Harmon.
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