Larva migrans (LM) refers to the prolonged migration and persistence of helminth larvae in the organs and tissues of humans and animals, and also refers to the disease entities resulting from paratenic larval migration. This chapter focuses on zoonotic LM caused by the canine and feline ascari...
slender cylindrical worms, usually of tiny size, that live in great numbers in water, soil, plants, and animals. They have a simple structure, with a long hollow gut separated from the body wall by a fluid-filled space. Several nematodes are parasites on animals and humans and cause ...
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DETECTION Although the early events after gastrointestinal nematode infection are poorly understood, epithelial cells are clearly the first host cells to come in contact with parasite larvae once the mucus barrier has been breached (Figure 1a). Whether or not these cells survive the assault and are...
Nematode larvae that are infectious to humans have generally undergone their first two molts in the soil (e.g., hookworms) or in an insect vector (filaria).S. stercoralisis unique among parasitic nematodes in that it may undergo all four molts outside the host and exist as a free-living...
Some nematodes secrete eggs into the dog’s feces, some larvae, and some produce microfilaria larvae into the circulation or the surrounding tissues as a result of reproduction. The egg or larva morphology is of diagnostic value and easier to sample than that of the adults. The greatest ...
exspectatus, we observed sustainable propagation with continuous production of newborn larvae for at least one month (~6 generations). To test the reproductive status of hybridization between P. pacificus and P. exspectatus in a quantitative manner, we analysed the number of progeny and the sex...
Most often, quantifying resistance has been through artificial challenge using variable doses of larvae with which the rate, time and specificity of infection 1Small Ruminant Genomics, International Centre for Agricultural Research in the Dry Areas (ICARDA), Addis Ababa, Ethiopia. 2Department of ...
Which stage of larvae deposits on and penetrates the skin of humans to cause infection? a. L1 b. L2 c. L3 d. L4 Active worms have be found in all of the following EXCEPT: a. cornea b. vitreous c. anterior chamber d. subconjunctiva ...
Nematode molting is an essential step in the life cycle and development of all nematodes, and characterizes the progression of the nematode larvae through the development of larval stages to the adult. A host animal, as used herein, is an animal in which a parasitic nematode can live and ...