Bacterial infections of the female reproductive system include:

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Question 1 of 9

Bacterial infections of the female reproductive system include:

Correct Answer: A

Rationale: Rationale: 1. Vaginitis is a common bacterial infection in the female reproductive system. 2. Toxic shock syndrome can be caused by certain bacterial infections. 3. Endometritis is inflammation of the endometrium often due to bacterial infections. 4. Salpingitis is inflammation of the fallopian tubes, commonly caused by bacteria. Summary: - Choice B: Nephritis is a kidney infection, not related to female reproductive system infections. - Choice C: Nephritis and cystitis are not specific to the female reproductive system. - Choice D: Cystitis is a bladder infection, not typically considered part of female reproductive system infections.

Question 2 of 9

Cultural characteristics of bacteria are:

Correct Answer: C

Rationale: The correct answer is C because cultural characteristics of bacteria refer to their growth patterns on different culture media, including liquid and solid agars. Bacteria exhibit unique growth patterns that can be observed and studied on these media. Choice A is incorrect as it refers to isolation techniques, not cultural characteristics. Choice B is incorrect as it describes metabolic activities, not cultural characteristics. Choice D is incorrect as it dismisses the essential aspect of bacterial growth on culture media.

Question 3 of 9

Which structure in bacteria allows them to exchange genetic material during conjugation?

Correct Answer: A

Rationale: Pili in bacteria are responsible for conjugation, allowing the transfer of genetic material between cells. They form a bridge between donor and recipient cells, facilitating the exchange of DNA. Flagella are for movement, capsules for protection, and ribosomes for protein synthesis. Pili is the only structure directly involved in genetic material exchange.

Question 4 of 9

Acute febrile pharyngitis and pharyngoconjunctival fever are often the clinical presentation of which viral infection:

Correct Answer: D

Rationale: The correct answer is D: Adenovirus. Adenovirus commonly causes acute febrile pharyngitis and pharyngoconjunctival fever. Adenovirus is known to cause respiratory infections and can present with symptoms such as sore throat, fever, and conjunctivitis. VZV (Varicella-Zoster Virus) causes chickenpox and shingles, not these specific symptoms. Measles virus causes a systemic illness with characteristic rash, not typically pharyngitis. Rubella virus causes a mild febrile illness with rash, but not pharyngitis. Therefore, based on the clinical presentation described, adenovirus is the most likely cause.

Question 5 of 9

Cholera is a serious gastrointestinal illness caused by bacteria of the genus:

Correct Answer: C

Rationale: The correct answer is C: Vibrio. Cholera is caused by Vibrio cholerae bacteria. These bacteria produce a toxin that causes severe diarrhea and dehydration. Escherichia (choice A) and Salmonella (choice B) are known for causing other types of gastrointestinal infections but not cholera. Acinetobacter (choice D) typically causes respiratory infections, not gastrointestinal illnesses like cholera. Therefore, the correct choice is Vibrio as it is specifically associated with cholera.

Question 6 of 9

Group II category diseases as established by the NIAID include:

Correct Answer: D

Rationale: The correct answer is D: reemerging diseases. Group II category diseases by the NIAID are those that have reemerged or have the potential to reemerge. This classification helps prioritize research and resources. Choice A is incorrect because new foodborne pathogens fall under different categories. Choice B is incorrect as eradicated diseases are not part of the reemerging group. Choice C is incorrect because bioterrorism agents are classified separately. Therefore, the correct answer is D as it aligns with the purpose of Group II category diseases.

Question 7 of 9

The effect of which of the following toxins DOES NOT MANIFEST with neurological symptoms:

Correct Answer: D

Rationale: Certainly! The correct answer is D: Pertussis exotoxin. Pertussis toxin primarily affects the respiratory system causing whooping cough. It does not directly target the nervous system like the other toxins listed. Tetanospasmin causes muscle spasms, Diphtheria exotoxin affects the heart and nerves, and Botulinum exotoxin causes paralysis by blocking neurotransmitter release. Therefore, Pertussis exotoxin is the only toxin among the options that does not manifest with neurological symptoms.

Question 8 of 9

Which of the following bacteria is associated with Lyme disease?

Correct Answer: A

Rationale: The correct answer is A: Borrelia burgdorferi. This bacterium is associated with Lyme disease, a tick-borne illness. Borrelia burgdorferi is transmitted to humans through the bite of infected black-legged ticks. It causes a range of symptoms, including fever, rash, joint pain, and neurological problems. Summary: B: Clostridium botulinum is associated with botulism, a serious illness caused by a toxin produced by this bacterium. C: Escherichia coli is a common bacterium found in the intestines of humans and animals, some strains can cause food poisoning. D: Streptococcus pneumoniae is a bacterium that can cause pneumonia and other respiratory infections, but not Lyme disease.

Question 9 of 9

Microscopic analysis of a smear stained by Ziehl-Neelsen method revealed bright red bacilli. What microorganism is being tested for?

Correct Answer: A

Rationale: The Ziehl-Neelsen stain is specific for acid-fast bacteria like Mycobacterium tuberculosis. The bright red bacilli seen in the smear indicate the presence of acid-fast organisms, which is characteristic of Mycobacterium tuberculosis. Staphylococcus aureus, Clostridium tetani, and Escherichia coli are not acid-fast bacteria and would not be stained red using the Ziehl-Neelsen method. Therefore, the correct answer is A: Mycobacterium tuberculosis.

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