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Slide 1 is a photo of a female (large egg-laden worm) and male (small worm) Syphacia obvelata, a mouse pinworm. Note marked sexual dimophism. Also note the egg exiting the vulva of the female. The vulva of the female Syphacia obvelata is located in the anterior sixth of the body. |
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Slide 2 is a photo of the anterior end of a female Syphacia obvelata. Note the fleshy lips and round esophaageal bulb typical of the Syphacia pinworms. |
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Slide 3 is a photo of a male Syphacia obvelata. Note the 3 bumps (ventral mammelons); these serve as clasping organs during copulation. The center mammelon of Syphacia obvelata is near the middle of the body. Also note the sharply pointed "male tail" which narrows abruptly behind the cloaca. |
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Slide 4 is a photo of a tape test from a mouse infected with Syphacia obvelata. Note the slender banana-shaped ova. |
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Slide 5 is a photo of a female Syphacia muris, the rat pinworm. Note the location of the vulva (slightly caudal to that of Syphacia obvelata). The vulva of Syphacia muris is located in the anterior fourth of the body. |
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Slide 6 is a photo of a male Syphacia muris. The anterior mammelon of Syphacia muris in near the middle of the body (contrast to Syphacia obvelata). |
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Slide 7 is a photo of a tape test of a rat infected with Syphacia muris. Note the shorter slightly banana-shaped ova as compared to ova of Syphacia obvelata. |
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Slide 8 is a photo of a femal Syphacia mesocricetus, the hamster pinworm. Note the round esophageal bulb and location of the vulva (similar to Syphacia muris). Also note the prominent cervical alae. |
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Slide 9 is a photo of a male Syphacia mesocriceuts. The center mammelon of Syphacia mesocricetus is near the middle of the body (similar to Syphacia obvelata). |
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Slide 10 is a photo of a tape test of a hamster infested with Syphacia mesocricetus. Note the shape of the ova. |
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Slide 11 is a photo of Aspiculuris tetraptera, another rodent pinworm. Note the characteristic oval esophageal bulb and prominent cervical alae. |
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Slide 12 is a photo of the tail of a male Aspiculuris tetraptera. Note the blunted point. |
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Slide 13 is a photo of an Aspiculuris tetraptera ova. Note its ellipsoidal shape. |
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Slide 14 is a photo of a tape test from a mouse infected with both Syphacia obvelata and Aspiculuris tetraptera. Whereas Syphacia pinworm females commonly migrate to the rectum and deposit their eggs on the perineum, Aspiculuris females do not. This phote depicts a rare finding of an Aspiculuris ova on a tape test. |
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Slide 15 is a photo of a female Passalurus ambiguus, the rabbit pinworm. Note the round esophageal bulb and long pointed tail. |
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Slide 16 is a photo of a male Passalurus ambiguus. Note the characteristic "male tail" and flattened mammelon. |
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Slide 17 is a photo of a fecal flotation preparation from a rabbit infected with Passalurus ambiguus. Note the oval shape with one side slightly flattened. |
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Slide 18 is a photo of the head of Dentostomella translucida, the gerbil pinworm. Note the lack of lips and small unidentifable cervical alae. |
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Slide 19 is a photo of the characteristic "male tail" of Dentostomella translucida. Note the fan shape and prominent spicule. |
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Slide 20 is a photo of a fecal flotation preparation from a gerbil infected with Dentostomella translucida. Note the oval shape with one side slightly flattened. |
