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What is salmonella typhosn
Typhoid is an enteric fever, which relates to acute infection of short duration. It is caused by bacteria called Salmonella typhosn about which you may recall studying ' in the Food Microbiology and Safety Course. The mode of spread of this infection is through the fecal-oral route. The source of infection is the drinking water, milk and food contaminated by intestinal contents (through feces and urine) of the patients or "carriers" or by flies which transmit the disease. It may affect all age groups but is commonly observed in children. The incidence and magnitude of typhoid fever has greatly reduced in the present context due to improved sanitation and vaccines and effective drugs available.
Explain Pedicellaria in brief? Defensive pincerlike structures found on the surface of echinoderms. They are capable of responding to external stimuli independently from the ma
write a note on clonning
Q. How are gases exchanged in sponges? The gas exchange in sponges happens by diffusion from the exterior to the cells that absorb molecular oxygen and liberate carbon dioxide.
Q. Engler and Prantl's System of Classification? Adolf Engler, Professor of Botany, University of Berlin, Germany, proposed a phylogenetic system of classification in a book en
describe the agar shake tube method
types of respiration
What are the main constituents of the earth's atmosphere in our time? The present atmosphere of the earth is constituted essentially of molecular nitrogen (N2) and molecular ox
Define Historical example of virulence? The "classical dogma" of epidemiologists was that pathogens all the time evolve in the direction of lower virulence, eventually becoming
Angiosperms are the flowering plants. They first appeared at least 110 million years ago from the unknown gymnosperm ancestor, these flowering plants have risen to dominance in th
What are the main types of waste? The waste can be classified into main types, each of them carrying its own dissimilar environmental problem: organic waste, non recyclable was
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