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NEET MDS Shorts

85611
Microbiology

The first recognized case in an epidemic outbreak is termed as the index case. Although both the index case and primary case appear to be the same yet they differ slightly. The term primary case refers to the person who first brings a disease into a group of people.

88633
Microbiology

There are some enzymes that cause protein to coagulate rather than to produce simpler compund These are known as lab enzymes

1. Coagulase:

  • Definition: Coagulase is an enzyme produced by certain bacteria, most notably Staphylococcus aureus. It catalyzes the conversion of fibrinogen (a soluble plasma protein) into fibrin (an insoluble protein), leading to the clotting of blood.
  • Function: The production of coagulase is a virulence factor for Staphylococcus aureus, as it helps the bacteria evade the host's immune system by forming a protective clot around the bacterial cells. This clot can shield the bacteria from phagocytosis and other immune responses.
  • Clinical Relevance: Coagulase is used in laboratory tests to differentiate between pathogenic Staphylococcus aureus (coagulase-positive) and non-pathogenic staphylococci (coagulase-negative).

2. Proteolytic Enzymes:

  • Definition: Proteolytic enzymes, also known as proteases or peptidases, are enzymes that catalyze the breakdown of proteins into smaller peptides or amino acids by cleaving the peptide bonds between amino acids.
  • Function: These enzymes play crucial roles in various biological processes, including digestion, protein turnover, cell signaling, and immune responses. They are found in many organisms, including humans, where they are involved in the digestion of dietary proteins in the stomach and small intestine.
  • Types: Proteolytic enzymes can be classified based on their mechanism of action (e.g., serine proteases, cysteine proteases, aspartic proteases, and metalloproteases) and their substrate specificity.

Wenmycin is an antibiotic that is derived from the bacterium Streptomyces wenyangensis. It belongs to the class of compounds known as macrolide antibiotics, which are characterized by their large lactone ring structure. Wenmycin has been studied for its antimicrobial properties, particularly against certain types of bacteria.

77659
Microbiology

In concentrations usually applied for sterilization purposes, ethylene oxide is preferable to formaldehyde becuase it is more penetrating

96669
Microbiology

  1. Incubation period: This term is typically used for infectious diseases and refers to the time between exposure to the infectious agent and the onset of symptoms.

  2. Serial interval: This refers to the time between successive cases in a chain of transmission, specifically in infectious diseases.

  3. Latent period: This is the time from the initiation of the disease process (or exposure to a risk factor) until the disease is detectable or until symptoms appear. In non-infectious diseases, this period can be significant, as the disease may be developing without any noticeable symptoms.

  4. Lag time: This term can refer to various delays in processes but is not specifically defined in the context of disease initiation and detection.

98570
Microbiology

The most efficient method of sterilization in dental practice is moist heat at 121°C for 20 min

46894
Microbiology

39312
Microbiology

The bacterial population in the gingival sulcus or the pocket that influences the course of periodontal disease has essentially the same organisms found in the healthy sulcus

87835
Microbiology

The bacteria having the highest lipid Content in the cell wall Mycobacterium tuberculosis

67591
Microbiology

80 - 100 % so nearly 100 -- 75 % also equally correct

51861
Microbiology

Lactobacillus is an acidogenic genus found in deep dental caries, that often increases significantly in the saliva during periods of caries activity

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