Microbe Isolation Methods

The Wall Street Journal

My patients in New York are suddenly afraid to eat their salads. But that reaction pales in comparison to what's happening in Europe, where consumers are coping first-hand with the sudden outbreak of a highly toxic strain of a known bacteria, Escherichia coli, more commonly known as E. coli. So far at least 24 people have been killed and thousands, sickened. People are panicked and worried every time they lift a salad fork. This is a common reaction. Whenever there is a sudden, deadly infectious outbreak, policy makers and consumers tend to personalize the risk. E. coli is an invisible, microscopic killer, which ramps up the fear quotient. It is difficult to wash the bacteria off of vegetables or your hands, compounding the sense of vulnerability. Add newspaper headlines trumpeting the "most deadly outbreak on record," and the juices really start to flow. Little wonder Russia banned imports of all produce from the European Union, or that Germany is pointing the finger at Spanish food producers, and vice versa. What are the facts? Though there is a hunt on to determine which vegetable is the source of the disease, most of these outbreaks originate in cows. Most farmers around the world feed cows grain instead of grass, which creates a more acidic environment conducive to bacteria in the animal's intestines. Before the cows are slaughtered, they are routinely treated with antibiotics to ward off infections. This is a normal and desirable process. The problem is that in making food safe, we can also create resistant bacteria with a Darwinian survival advantage. This mutant bacteria passes into the cow's manure, contaminating crops either directly or indirectly via rainwater or faulty irrigation. It really makes no difference whether the offending crop is cucumbers or bean sprouts or spinach; what matters is the process that put the bug there. The current outbreak of E. coli is distinct because of the power of its toxin. Some variants can cause bloody diarrhea and fever, but this particular toxin is so powerful it has caused kidney failure in more than a third of cases, a very unfortunate development because that often leads to dialysis and is irreversible. This disturbing trend toward a more potent E. coli toxin was noted in the European Center for Disease Prevention and Control's Annual Epidemiological Report on Communicable Diseases in 2010. So though the overall fatality numbers are still small, this strain of E.

Latest Syllabus & Sample Papers for Various Board Exams and ...

Particle size and distribution, average particle size, number and weight distribution, particle number, methods for determining particle volume, methods of determining particle size- optical microscopy, sieving, sedimentation; measurements of particle shape, specific surface area; methods for determining surface area; permeability, adsorption, derived properties of powders, porosity, packing arrangement, densities, bulkiness & flow properties. Liquid interface, surface and interfacial tensions, surface free energy, measurement of surface and interfacial tensions, spreading coefficient, adsorption at liquid interfaces, surface active agents, HLB classification, solubilization, detergency, adsorption at solid interfaces, solid-gas and solid-liquid interfaces, complex films, electrical properties of interface. Colloidal dispersions: Definition, types, properties of colloids, protective colloids, applications of colloids in pharmacy; Suspensions and Emulsions: Interfacial properties of suspended particles, settling in suspensions, theory of sedimentation, effect of Brownian motion, sedimentation of flocculated particles, sedimentation parameters, wetting of particles, controlled flocculation, flocculation in structured vehicles, rheological considerations; Emulsions-types, theories, physical stability. Historical development of antibiotics. Antimicrobial spectrum and methods used for their standardization. Screening of soil for organisms producing antibiotics, fermenter, its design, control of different parameters. Isolation of mutants, factors influencing rate of mutation. Design of fermentation process. Isolation of fermentation products with special reference to penicillins, streptomycins tetracyclines and vitamin B12. Poisons Act 1919; Drugs and Magic Remedies (Objectionable Advertisements) Act 1954; Medical Termination of Pregnancy Act 1970 & Rules 1975; Prevention of Cruelty to Animals Act 1960; States Shops & Establishments Act & Rules; Insecticides Act 1968; AICTE Act 1987; Factories Act 1948; Minimum Wages Act 1948; Patents Act 1970. A brief study of the various Prescription/Non-prescription Products. Medical/Surgical accessories, diagnostic aids, appliances available in the market. Handling of prescription, source of errors in prescription, care required in dispensing procedures including labeling of dispensed products.

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