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Protection Against Insect Bites
To minimize insect bites, travellers should wear light-colored, long-sleeved shirts, pants and socks. The most effective topical insect repellent is N, N-diethyl-m-toluamide (DEET). Sprayed on exposed skin, DEET repels mos- quitoes, ticks, chiggers, fleas, gnats and some flies. DEET is available in formulations of 5-40% and 100%. Higher concentrations do not improve efficacy, but usually protect longer; 30-35% DEET formulations are preferred by Medical Letter consultants. A long-acting DEET formulation originally developed for the US Armed Forces (US Army Extended Duration Topical Insect and Arthropod Repellent - EDTIAR) containing 25-33% DEET (Ultrathon) can provide protection for 6-12 hours
Patients on HAART Rifamycins induce hepatic CYP3A4 enzymes and can accelerate metabolism of protease inhibitors and some non-nucleoside reverse transcriptase inhibitors (NNRTIs
What is Specific defence mechanism Specific: These relate to specialized cells located throughout the body which respond to invasion of foreign materials/microorganisms su
What is the vector of Chagas' disease? How is the disease transmitted? The vector of Chagas' disease is its middle host, a triatomine bug. The major species is Triatoma infesta
Q What are the hyphae and the mycelium of pluricellular fungi? The major structures of pluricellular fungi are the hyphae threadlike filaments made of contiguous uni or multinu
How are antivenoms produced? Why are antivenoms an example of passive immunization? Antivenoms are getting by the following process: the venom (antigen) is inoculated into othe
how many species of protozoan?
Excretory organ of lizard.
What do the major organs of the digestive system do? They are salivary glands, teeth, tongue, gums, esophagus, stomach, small intestine, large intestine, pancreas, liver, and g
What is the procedure of Gas Exchange in human body? Exchange of oxygen with the blood is a specialized process. If oxygen were carried in solution in blood plasma (the liquid
Quantitative changes The quantitative changes in the availability of the active biomolecules occur in order to compensate for the loss of efficiency of the system caused by th
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