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Escherichia coli is generally regarded as part of the normal flora of the human intestinal tract and that of many animals. Serotypes of E. coli which have been implicated in human diarrhoeal diseases or food poisoning outbreaks and have been designated enteropathogenic E. coli (EEC). They grow over a wide range of temperatures, 20-40ºC with a minimum growth temperature at 10ºC and an optimum at 37ºC. Heating at 65ºC for 15-20 minutes is lethal. The pH range for growth is 4.2-8.50, with an optimum in the range of pH 7.2-7.5. E. coli will grow in the presence of 5.0% salt at 37ºC but 10% is inhibitory.
A 70-year old woman presents with a 1-hour history of crushing substernal chest pain. Shortly after admission, the patient expires. An autopsy reveals calcium deposits in the intim
Ventricular Septal Defect (VSD) In ventricular septal defect there is abnormal communication between right and left ventricle. Anatomically 90 per cent of all VSD are located
Diarrhoea Diarrhoea refers to frequent passage of loose watery stools. Acute diarrhoea often called as acute gastroenteritis is particularly a leading cause of mortality in
What are the different mechanisms responsible for corneal avascularity? Various mechanisms responsible for its avascularity are as follows: a) Chemical Theory: I) Role o
Fusion inhibitor After HIV binds to the host cell surface, a conformational change occurs in the transmembrane glycoprotein sub- unit (gp41) of the viral envelope, facilitatin
What are the environmental harms caused by mercury pollution? What are the main sources of mercury pollution? Mercury is a metal that when present in the water of lakes, river
How can the concept of recombination frequency be used in genetic mapping? Genetic mapping is the determination of the location of the genes in a chromosome. By determining
What is the aim of milling The aim of milling (the process including crushing and grinding) is to obtain preferentially a flour, in which the constituents of the endosperm cell
F o wl cholera Fowl cholera, a highly contagious disease of poultry caused by Pasteurella multocida, was one of the first infectious diseases to be recognized by Louis Past
Q. What is the relationship between concentration gradient and passive and active transport? Passive transport is the movement of substances across membranes in favour of their
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