Helminth - Pictures

fertilized Ascaris lumbricoides

nonfertilized Ascaris lumbricoides

Hookworm egg

rhabditiform larvae hookworm

• 250-300 um long; a long buccal canal and an inconspicuous genital primordium

rhabitiform larvae strongyloides stercorlais (short and sexy)

• 225 um; short buccal canal and prominent genital primordium

Trichuris trichuria egg

• barrel-shaped with plugs

Enterobius vermicularis egg

• coiled larva, developing in egg

Trichinella spiralis

• diagnosis is usually made serologically or based on observation of the larvae in muscle tissue

Dibothriocephalus latus

• large, oval, operculated

proglottid Dibothriocephalus latus

• broader than long; uterus is coiled in rosette appearance

Hymenolepsis nana egg

proglottid Hymenolepsis nana

• uterus not visible. proglottid filled with eggs

Taenia spp. egg

• spherical with thick striated shell. 3 pairs of hooklets

T. saginata

• contains 15-20 main lateral branches on each side

• four large suckers and lack of rostellum and rostellar hooks

T. solium

• 7-13 lateral branches on each side

• four large suckers and rostellum (smalll projection) containing two rows of hooks

Dipylidium caninum egg

• formation of egg packets

proglottid Dipylidium caninum

• pumpkin seed-shaped when passed and rice grains when dried

Paragonimus

Schistosoma mansoni (large lateral spine)

Schistosoma japonicum (small lateral spine)

Schistosoma haematobium (large terminal spine)

Clonorchis sinensis (tiny)