opthamology notes

Apr 16th, 2015
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MCQs in Tropical MedicineMCQs in Tropical MedicineRob Skelly DTM+H FRCPhttp://health.groups.yahoo.com/group/pediatric_doctors/http://health.groups.yahoo.com/group/pediatric_doctors/http://health.groups.yahoo.com/group/pediatric_doctors/By .Dr.serdar1. The following are recognised causes of eosinophiliaa. malariab. visceral leishmaniasisc. Churg-Strauss syndromed. drug hypersensitivitye. visceral larva migrans (toxocariasis)Answer 1EosinophiliaFFTTTThe upper limit of normal for eosinophils is usually taken to be0.4x10^9/l. The causes of eosinophilia may conveniently be dividedinto two groups: parasitic and non-parasitic. In general protazoalinfections do not produce eosinophilia. Helminths do cause eosinophiliaand the degree of eosinophilia is related to the extent of tissueinvasion by the helminth. Filarial worms often cause a higheosinophilia whereas the intestinal nematodes tend to cause only amodest increase in the eosinophil count.Table1.1Important parasitic causes ofeosinophiliaFilarial wormsTapewormsStrongyloidiasisHydatid diseaseHookwormFascioliasisToxocariasis (visceral larva migrans)SchistosomiasisTrichinella spiralisIntestinal nematodesTropical pulmonary eosinophilia (usually resultsfrom hypersensitivity to microfilariae)Table 1.2Non-parasitic causes ofeosinophiliaAllergic disordersAsthmaAllergicEczemadisordersHayfeverDrug hypersensitivityChurg-Strauss syndromeAuto-immune Wegener's granulomatosisPolyarteritis

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