Tamil Nadu HSE First Year Microbiology case studies
Tamil Nadu HSE First Year Microbiology · Put your knowledge to work in context.
The Tamil Nadu Higher Secondary First Year Microbiology course is the +1 (Class 11) vocational subject taken by students who choose the microbiology stream in Tamil Nadu state board higher secondary schools. It introduces the microbial world as a laboratory science: the historical milestones that shaped the discipline, the structure and morphology of bacteria, fungi, viruses, algae and protozoa, how microbes are nourished, grown and cultured, the basics of microbial genetics, sterilisation and disinfection, immunology, medical microbiology, and the applied fields of environmental, agricultural, industrial, food and dairy microbiology, together with laboratory practice and safety. The Tamil Nadu HSE First Year Microbiology case studies are 5 cases and about 3,674 words.
1Spore-strip failure in a 25-bed nursing home autoclave
A 25-bed nursing home in a district town runs its own central sterile services department. Dressing packs are wrapped in two layers of cotton cloth, loaded into a horizontal autoclave and processed at 121 °C, 15 psi for 20 minutes.
787 words, about 4 min2Soil viable count, an anaerobe that will not grow, and a medium that supports nothing
In a Class 11 practical examination a student is given 1 g of garden soil and asked to estimate the total viable bacterial count. She suspends the soil in 9 mL of sterile water, makes ten-fold dilutions up to 10⁻⁶, and spreads 0.1 mL of the 10⁻⁴, 10⁻⁵ and 10⁻⁶ dilutions on nutrient agar in duplicate.
699 words, about 3 min3UV mutagenesis, photoreactivation and a crowded replica plate
In a college laboratory a student irradiates 10 mL of a log-phase Escherichia coli suspension with a 254 nm UV lamp at a fixed distance for 0, 20, 40 and 60 seconds, stirring the suspension in an open sterile petri dish. The lamp was switched on only one minute before the first exposure.
753 words, about 4 min4A punctured foot, a full primary course and an empty immunoglobulin cold box
An 11-year-old boy is brought to a primary health centre two hours after stepping on a rusty nail hidden in garden soil. The wound is 1 cm deep, punctured, and contains dirt and a fragment of cloth; the medical officer irrigates it with saline and removes the cloth.
694 words, about 3 min5A positive phosphatase test at a village milk cooperative
A village milk cooperative collects about 4,000 litres a day from 60 farmers and pasteurises it by the holder method, 63 °C for 30 minutes, before packing into 500 mL sachets. During an inspection the food safety officer records four findings.
741 words, about 4 min