Dr. Holló Ferenc szerk.: Parasitologia Hungarica 3. (Budapest, 1970)
Strong yloid.es s ter coralis : The very slender third stage larva has no protective sheath (single exception!), and measures about ' 600 ju, ; the oesophagus is uniformly thin, cylindrical along its full length (filariform), measuring merely one half of the full length (single exception!); the hind end is bifurcated, and measures about 80-90 ju, ( Fig. 8 ). Eggs cannot be found in constipated faeces or in those discharged 12-36 hours earlier, as with suitable conditions of temperature and oxygen, first stage larvae will have hatched already and moulted, soon reaching the second larval stage. Their recognition is essential inasmuch as dead or arrested larvae may occur in faecal culture. Additional difficulties and errors in diagnosis may arise from contamination of the stool by free living plant-nematodes and larvae. The buccal cavity of the first (and second) stage trichostrongy- lid and Ancylostoma larvae is readily visible, cylindrical in shape, and lined with a thick cuticle. The oesophagus is rhabditiform:it consists of a broadening procorpus with (or without) a neck-like isthmus and of a posterior bulb;in length the oesophagus is about l/3 of full larval size.Recently hatched larvae are transparent, and fully developed ones are filled with dark alimentary granules. Free living nematodes, their eggs and larvae may simultaneously occur in faeces contaminated with soil. Mature females are sizeable with a fairly long hind end and contain eggs; the males have characteristic, short spicule as well as the short, inclining hind end, tapering to a pinpoint, and can easily be recognized. The buccal cavity of their larva is similar to that described earlier; they have a rhabditiform oesophagus divided into three parts. Summary Two cases of Trichostrongylus colubriformis infection in children are reported. In the first, gastrointestinal complaints were
