A medium consists of 10 g NaCl 20 g peptone 05 g citric acid

A medium consists of 10 g NaCl, 20 g peptone. 0.5 g citric acid, and 200 g gelatin per liter of water. This is best described as what type of medium: a general purpose, (b) synthetic, (c) complex, (d) selective, (e) differential. A individual that inconspicuously shelters a pathogen and spreads it to others during the last phases of recovery is: (a) incubation carrier, (b) passive carrier, (c) chronic earner, (d) convalescent carrier, (e) asymptomatic carrier. Abiogenesis refers to the: (a) spontaneous generation of organisms from non-living matter, (b) germ theory of disease, (c) development of aseptic technique, (d) development of life forms from preexisting life forms. An acid fast organism would be placed in which of the phyla according to the taxonomic scheme used by your textbook, (a) Gram negative Protobacteria (b) Gram positive Firmicutes, (c) Gram positive Actinomycetes, (d) Chlamydiae, (e) Spirochaetes. An organism isolated from your patient is described as an anaefobic gram positive spore forming rod. Which organism could this be: (a) Staphylococcus aureus, (b) Clostridium tetani. Bacillus ant hr ac is, (d) Corynebacterium diphtherias, (e) Mycobacterium tuberculose. An example of a differential solid medium used for gram negative rods is: (a) meat infusion, (b) nutrient agar, (b) MacConkey\'s agar, (c) EMB agar. (d) blood agar, (c) chocolate agar. Binomial scientific nomenclature means each organism is identified using the name of its(a) a and a domain, (b) a class and order, (c))a genus and species, (d) a family and genus, (e) a division or phylum. All of the following are the results of fixation EXCEPT: (a) the enzyme activity stops, the morphologic details are preserved, (c) tissues are safe to handle, (d) the organism is protected in transport medium, the technician is protected from infection. A suspension carbon particles is: (a) used for fat stains, (b) use/for negative staining. (c) includes India ink.(d) filtered to produce nigrosine, (e) A and D are correct, (f) B, C and D are correct, (g) C and D arc correct. Although some Actinomycetes are considered partially acid fast/microbiologists usually arc referring to which of the following when they describe an organism as acid fast:(a) Streptococcus, (b) Mycobacterium, (c) Staphylococcus, (d) Clostridium, (e) Mycoplasma A clear association between contamination of the attendants\' hands and childbed fever infections in maternity wards was demonstrated by: (a) Holmes, (b) Semmelweis, (c) Lister, (d) Pasteur, (e) Koch

Solution

19.Diffential medium- A medium in which a substance is added that bring out differing characteristics of bacteria. Thus enabaling to distinguish between them is known as diffential medium. Only this medium contain sugar like citric acid and ascorbic acid.

20. Convalescent carrier- This is an individual who recovered from an infectious disease but continues to harbour a large no. Of pathogen in its body.

21. Abiogenesis- is a scientific theory which states that life arose on earth via spontaneous natural means in other word life comes from non living matter.

22. Acid fast organisms are placed in phyla Gram +ve Actinomycetes because they stained by acid fast stain due to presence of high GC content.

Example Mycobacterium.