38. Physical, chemical, mechanical methods destroy...

38. Physical, chemical, & mechanical methods destroy reduce undesirable microbes. The Primary targets are microorganisms capable of causing infection or spoilage, these include: a. vegetative bacterial cells and endospores b. protozoan trophozoites and cysts c. helminthes d. viruses e. all the above 39. Factors that affect the death rate of bacteria include the mode-of-action of the antibacterial agent. T or F 40. Antimicrobial agents maybe designed to prevent the following microbe (pathogen)processes. a. replication, transcription, translation b. peptide bond formation; protein synthesis c. all the above d. none of the above

Transcript

00:01 Question 38 discusses about pathogens.

00:04 Pathogens are the ones which disturbs the environment.

00:08 They disturb the environment in the sense.

00:10 They alter the normal processes or normal physiology of an environment.

00:16 For example, let's say the human body.

00:18 The human body will perform normal processes like digestion, excretion, metabolism and so on.

00:25 When the invasion of a pathogen will alter this metabolism.

00:30 Because the digestion in turn it will result in formation that is acquiring nutrients and these nutrients are required by these pathogens as well so the amount of nutrient present to the body it will go down so in this way they interfere with the normal functioning of the body and it will disturb the state so this pathogens can be eliminated via three important methods the first method are the physical method and this physical method can involve boiling or any other thing which can destroy the growth of of the particular microbe.

01:01 And the chemical method here includes the action of enzymes or any other processes.

01:07 Because any acidic or a basic ph cannot be so cannot provide a supportive condition.

01:13 And the other one includes the mechanical methods.

01:16 Here mechanical methods will include any other other than from the physical and chemical methods.

01:20 So this will also destroy the microbes.

01:23 So the microbes which being destroyed here include different types.

01:27 For example, it can include the bacteria and the bacteria.

01:30 Can be either present in a vegetative state.

01:33 So this will keep the microbe alive.

01:36 So other than that, it can also be in an endospor.

01:38 Here, endospoe denotes the dormant state, which will form in unfavorable condition.

01:44 So both of these needs to be eliminated.

01:46 And next to it, it is the protozoan.

01:49 The protozoan here denotes the trophocytes and also the cyst.

01:53 Let's write t for trophosite and c for sister.

01:56 Both needs to be eliminated because both can be infectious...

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