NEETMDS.com -Microbiology- demo

1 Microbiology

Two important factors for initiation of caries by oral streptococci are
1 production of glucosyl transferase and synthesis of insoluble dextran
2. production of acid and production or protease
3. production of collagenase and pro- duct ion of hyaluronidase
4. fermentation of mannitol and sorbitol and production of protease.

Option 1

Two important factors for initiation of caries by oral streptococci are production of glucosyl transferase and synthesis of insoluble dextran

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2 Microbiology

A bacterial disease with oral manifestations is�
�1. Herpes Measles
�2. Measles
�3. Diphtheria
�4. Leishmaniasis

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Diphtheria serious bacterial infection that usually affects the mucous membranes of the nose and throat.

Diphtheria signs and symptoms usually begin 2 to 5 days after a person becomes infected. Signs and symptoms may include:

A thick, gray membrane covering the throat and tonsils
A sore throat and hoarseness
Swollen glands (enlarged lymph nodes) in the neck
Difficulty breathing or rapid breathing
Nasal discharge
Fever and chills
Tiredness

Skin (cutaneous) diphtheria
A second type of diphtheria can affect the skin, causing pain, redness and swelling similar to other bacterial skin infections. Ulcers covered by a gray membrane also may be a sign of skin diphtheria.

3 Microbiology

Which of the following is an acidogenic genus found in deep dental caries, that often increases significantly in the saliva during periods of caries activity?
1.Lactobacillus
2.Candida
3. Actinomyces
4. Rothia

Option 1

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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4 Microbiology

Flurescent microscopy is used to diagnose:
1) Mycobacterium tubeculosis
2) Staphylococcus aureus
3) Streptococcus capsulatum
4) Klebsilla aerogenes

Option 1

Mycobacterium tuberculosis: Fluorescent microscopy can be used to detect Mycobacterium tuberculosis in clinical specimens, especially when using specific fluorescent dyes (like auramine-rhodamine) that bind to the mycobacterial cell wall. This method allows for the visualization of the bacteria under a fluorescence microscope, making it a valuable tool in the diagnosis of tuberculosis.

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5 Microbiology

The period from disease initiation to disease detection in non-infectious disease is called -
1. Incubation period
2. Serial interval
3. Latent period
4. Lag time

Option 1

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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.
Serial interval: This refers to the time between successive cases in a chain of transmission, specifically in infectious diseases.
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.
Lag time: This term can refer to various delays in processes but is not specifically defined in the context of disease initiation and detection.

Option 4

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