MSD Manual

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MSD Manual
Veterinary Manual
The trusted provider of veterinary information since 1955

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VETERINARY PET
Trichuris suis egg
trichuris-spp-egg-pigs-ballweber-sized
Trichuris suis egg

    Photomicrograph of Trichuris suis egg. Note the characteristic lemon shape and polar plugs (opercula). Long dimension of egg, approx 50–68 mcm.

Courtesy of Dr. Bruce Lawhorn.

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Trichuris sp in Pigs

Merck & Co., Inc., Rahway, NJ, USA (known as MSD outside of the US and Canada) is dedicated to using leading-edge science to save and improve lives around the world.  The Veterinary Manual was first published in 1955 as a service to the community.  The legacy of this great resource continues in the online and mobile app versions today.

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