Тест: Microorganisms and Human Disease — 9 въпроса

1. What was the primary method used by Louis Pasteur to establish the causality between microbes and diseases?

A. Observing microbes under a microscope

B. Studying the genetic material of microbes

C. Using chemical tests to identify microbes

D. Cultivating microbes and inoculating healthy hosts

Answer: (D)

Обяснение

Louis Pasteur's experiments involved isolating microbes, cultivating them in laboratory conditions, and then inoculating healthy hosts to observe disease development. This method proved the causal relationship between specific microbes and diseases.

2. Which microorganism was demonstrated by Louis Pasteur to cause disease through cultivation and inoculation methods?

A. Bacillus anthracis

B. Erysipelothrix rhopathiae

C. Staphylococcus aureus

D. The specific microorganism was not named but exemplified Pasteur's method of demonstrating causality.

Answer: (D)

Обяснение

Louis Pasteur proved causality by cultivating microorganisms and inoculating hosts to observe disease, although the specific pathogen was not named here. Bacillus anthracis and Erysipelothrix rhopathiae are examples of major pathogens but not specifically linked to Pasteur's demonstration in this context.

3. Which of the following pathogens is correctly matched with its associated disease?

A. Erysipelothrix rhusiopathiae - Tuberculosis

B. Bacillus anthracis - Anthrax

C. Mycobacterium leprae - Cholera

D. Streptococcus pyogenes - Malaria

Answer: (B)

Обяснение

Bacillus anthracis is the bacterium responsible for causing anthrax. Erysipelothrix rhusiopathiae causes rouget du porc, not tuberculosis. Mycobacterium leprae causes leprosy, and Streptococcus pyogenes is associated with sore throats and skin infections, not malaria.

4. What is a primary method used to prevent diseases caused by microorganisms according to the revision sheet?

A. Antibiotics and antivirals

B. Vaccines, hygiene, and insecticides

C. Microbiota transplantation

D. Isolation of infected individuals only

Answer: (B)

Обяснение

The revision sheet highlights vaccines, hygiene, and insecticides as key preventive measures, specifying their role in controlling disease spread, unlike antibiotics which are primarily treatments rather than preventive measures.

5. How does the microbiota contribute to human health?

A. By replacing the immune system

B. By protecting against pathogens and aiding digestion

C. By producing harmful toxins

D. By causing infections and diseases

Answer: (B)

Обяснение

The microbiota, consisting of microorganisms in the human body, plays a vital role in protecting against pathogens through competition and is essential for digestion and immune function, thereby contributing positively to human health.

6. Which of the following is true about microbiota development?

A. Microbiota begins to develop during adulthood only.

B. Microbiota development begins at birth and is influenced by diet, environment, and age.

C. Microbiota are static and do not change once established.

D. Microbiota only develop after exposure to pathogenic microorganisms.

Answer: (B)

Обяснение

The sheet states that microbiota develop from birth and are influenced by various factors, emphasizing their dynamic nature and early development.

7. Name a major pathogen that is a bacteria involved in human disease as mentioned in the sheet.

A. HIV virus

B. Bacillus anthracis

C. Candida albicans

D. Plasmodium falciparum

Answer: (B)

Обяснение

Bacillus anthracis, a bacterial pathogen, is listed as a major pathogen in the sheet. HIV and Plasmodium are viruses and protozoa, respectively, and Candida is fungi.

8. What role do vectors like mosquitoes play in disease transmission?

A. They act as reservoirs of the pathogens.

B. They transmit pathogens from reservoirs to humans.

C. They protect humans from infection.

D. They are unaffected by the pathogens they carry.

Answer: (B)

Обяснение

Mosquitoes are described as vectors that acquire pathogens from reservoirs and transmit them to humans, facilitating disease spread.

9. Which statement accurately describes dysbiosis?

A. It is a balanced state of microbiota beneficial to health.

B. It refers to an imbalance in microbiota linked to diseases such as obesity.

C. It is the complete absence of microbiota in the body.

D. It exclusively occurs due to antibiotic use.

Answer: (B)

Обяснение

Dysbiosis refers to an imbalance in microbiota, which the sheet links to diseases like obesity, indicating its disruptive nature rather than beneficial or total absence.