April 04, 2013

Regarding the white blood cells

The following are recognised causes of eosinophilia:

a). Malaria
b). Visceral leishmaniasis
c). Churg-Strauss syndrome
d). Drug hypersensitivity
e). Visceral larva migrans (toxocariasis)

The correct answer is F F T T T

The upper limit of normal for eosinophils is usually taken to be 0.4x109/l.

The causes of eosinophilia may conveniently be divided into two groups: parasitic and nonparasitic.

In general protozoal infections do not produce eosinophilia. Helminths do cause eosinophilia and the degree of eosinophilia is related to the extent of tissue invasion by the helminth. Filarial worms often cause a high eosinophilia whereas the intestinal nematodes tend to cause only a modest increase in the eosinophil count.

Important parasitic causes of eosinophilia include:
  • Filarial worms
  • Tapeworms
  • Strongyloidiasis
  • Hydatid disease
  • Hookworm
  • Fascioliasis
  • Toxocariasis (visceral larva migrans)
  • Schistosomiasis
  • Trichinella spiralis
  • Intestinal nematodes
  • Tropical pulmonary eosinophilia(usually results from hypersensitivity to microfilariae)

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