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Q. Can you explain Cholera?
Cholera is one of the diseases which had caused epidemics all over the world. The organism which causes the disease is Vibrio cholerae. It is an aerobic, facultatively anaerobic, straight or slightly curved, short, gram-negative, oxidose-positive rod with a single flagellum.
The K cholerae produces a heat-sensitive enterotoxin while growing in the human intestine. It causes the characteristic cholera symptoms including 'rice water stool'. The toxin is heat labile. The incubation period of cholera ranges from a few hours to 5 days but usually between 2-3 days. The symptoms include abrupt onset of vomiting and watery diarrhoea. Diarrhoea has a rice water appearance, where the stools look like water with flecks of rice in it hence the name 'rice water stool'. Dehydration may be followed, causing death in some cases, if prompt electrolyte supplementation is not provided. Antibiotic treatment helps in reducing the duration of the disease by killing the organisms before they become bound to mucosa.
Preformatio n Theory (1632-1723) (i) Scientist 'Malpighi Swammerdam' propounded the preformation theory. This theory holds that the sex cells (sperm and ova) had the m
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Q What is the morphological feature of molluscs after which the phylum is named? The word "mollusc" imply "soft thing". Molluscs have soft bodies and this feature describes the
Maintain nutrition Your responsibility as a nurse is to take care of nutrition and prevent the child from starvation. Breast feeding'should be continued during the diarrhoea e
hows does insulin from the pancreas reach the liver?
WHAT ARE TRACHEOLES
Take the prepared slide of Euglena and focus it first under low power and next under the high power of tlie microscope. Observe tlie following characteristics: i) Euglena is an
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