Pinworm:Scientific Name:Enterobiusvermicularis p227
Scientific Name: Enterobius vermicularis p227 Pinworm:
GeneralIntroduction:1.The adult worms inhabit the cecum and colon2. No host other than man.3. Affecting mainly children below the age of 12years
1.The adult worms inhabit the cecum and colon. 2. No host other than man. 3. Affecting mainly children below the age of 12 years. General Introduction:
I.Morphology1. Adultslook like a pin and are whitein color.Female: 8 ~13 mm, fusiformin shape.Male: 2-5mm. The tail of amale is curved. They die rightafter mating, thus males arerarely seen.MaleFemale
I. Morphology 1. Adults look like a pin and are white in color. Female: 8 ~13 mm, fusiform in shape. Male: 2-5mm. The tail of a male is curved. They die right after mating, thus males are rarely seen
PinwormMale&Female adultMaleFenale
Pinworm Male &Female adult
The anterior end tapers and is flanked on each side by cuticularextensions called“cephalic alae"The esophagus is slenderterminating in a prominent posterior bulb, which is calledesophagealbulbCephalicalaeesophagealbulb
The anterior end tapers and is flanked on each side by cuticular extensions called “ cephalic alae”. The esophagus is slender, terminating in a prominent posterior bulb, which is called esophageal bulb
MorphologyEgg: 50-60 by 20-30 μm,大persimmon seed-like, ovoidbut asymmetrically flattened虫卵on one side, colorless andtransparent, thick andasymmetric shell, content is atadpole larva
Egg: 50-60 by 20-30 µm, persimmon seed-like, ovoid but asymmetrically flattened on one side, colorless and transparent, thick and asymmetric shell, content is a tadpole larva. Morphology
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eggs are thin shelled, ovoid and flattened on oneside and measure 50-60 by 20-30 μm; theyoften are embryonated
eggs are thin shelled, ovoid and flattened on one side and measure 50-60 by 20-30 µm; they often are embryonated
LEmbryonatedeggsingestedbyhuman2Larvaehatchin small intestineEggsonperianalfoldsAdults in lumenLarvae inside the eggsofcecummaturewithin4to6hoursInfectiveStageGravidmigrates5gDiagnostic Stagetoperianalregion1atnighttolayeggs
EggsEgg is ingestedEggscontaminatefingersEggsLarvae hatch incontaminatesmall intestinetingersLarvae hatchinsmall intestineLarvaemigrateto colonEggs embryonateonperianumAdultsAdults lay eggsmaturein colononperianal regionAdult matureEggs embryonatein colononperinearegionAdults lay eggs on perianum