Bacterial Pathogenesis Practice Problems

Under what circumstances can E. coli become harmful to the human body?

What does virulence measure in the context of pathogens?

The ID₅₀ of four bacteria is as follows:

Salmonella typhi - 10³ cells

Vibrio cholerae - 10⁸ cells

Mycobacterium tuberculosis - 10² cells

Campylobacter jejuni - 10⁴ cells

Identify the most infectious bacteria based on the aforementioned data.

Choose which statement is correct about the infectivity of a sample pathogen:

I. ID₅₀, is the estimated number of organisms or virus particles required to produce infection

II. Virulence is described as the ability of an organism to infect the host and cause a disease

III. Pathogenicity refers to the ability of an organism to gain entry into a host

Which of the following statements is false?

What is the composition of the vaccine that provides protection against tetanus?

Which of the following is/are correctly matched:

The bacterium C. perfringens is commonly found in which of the following organs:

Which of these is the world’s most common bacterial zoonosis?

Which of the following is considered a viral disease of the lower respiratory system?

What similarity between bacterial and viral pneumonia is true?

Which of the following is matched correctly?

Jason has been diagnosed with pneumonia after presenting symptoms such as high fever, breathing difficulty, and chest pain. Which of the following pathogens may have possibly caused this illness?

Which of the following is matched incorrectly?

What is the recommended method for administering PPD in the Mantoux test?

Which of the following bacteria exclusively lives in humans and could manifest with the following symptoms; prolonged high fever, altered mental state, fatigue, headache, nausea, abdominal pain, constipation or diarrhea, and sometimes a rash:

Pelvic inflammatory disease (PID) is most commonly associated with which of the following:

The following are risk factors for urinary tract infections, except:

When lower urinary tract infections move up to the ureters, they can cause pyelonephritis affecting which part of the body?

Which of the following is the reason behind the increased susceptibility of females to cystitis:

Which of the following is matched incorrectly?

Which of the following infections is not caused by a bacterium or fungus?

Which of the following infections is not caused by E. coli?

Coliforms have served as indicators of microbial contamination in water sanitation. Why are coliforms ineffective for detecting viruses in the water?

Which of the following best describes true pathogens?

Where can biofilms form:

All of the following are examples of adhesins,except:

What is the third task a pathogen needs to fulfill after adhesion?

Mycoplasma pneumoniae infection is an example of which type of pneumonia?

Which type of pneumonia often has a lower fever and little to no chills?

Which bacterium is the most common cause of bacterial pharyngitis?

Which of the following vaccines provides immunity against both diphtheria and pertussis?

In which disease would antibiotics be beneficial?

Which of the following statements regarding the BCG vaccination is true?

Which of the following can trigger trigeminal neuralgia?

Which of the following statements about HSV-1 is true?

All of the following statements regarding cold viruses are correct, except:

Acne is a common skin infection among teenagers caused by a:

Which disease caused by S. pyogenes is also considered a "flesh-eating disease"?

All of the following are infections caused by P. aeruginosa, except:

Which of the following statements about dermatophyte infections is false?

Which statement about cutaneous candidiasis is true?

Which of the following symptoms is typically associated with bacterial conjunctivitis?

What can happen if neonatal bacterial conjunctivitis is left untreated?

What is the primary cause of trachoma?

Which toxin produced by Clostridium perfringens is responsible for the characteristic tissue necrosis seen in gas gangrene?

Which of the following is a feature of coagulase-positive Staphylococcus aureus strains?

Which of the following options includes only microbes linked to infections of the eyes?

Following a dog bite, the patient experienced some early symptoms of rabies. Which of the following statements accurately explains why it's necessary to retrieve and test the dog's brain tissues for the rabies virus?

Which type of meningitis is more prevalent than the others among the following?

Which class of drugs is most frequently prescribed as a first line of treatment for bacterial meningitis?

In meningitis, the inflammation of the meninges causes the following symptoms except:

Which of the following is the gold standard test for bacterial meningitis:

C. jejuni infections are mainly linked to consuming inadequately cooked poultry products. An infection in an immunocompromised individual can lead to:

What preventive measure can be taken to prevent the transmission of mumps virus?

Which of the following is associated with food poisoning?

How are hookworms transmitted to humans?

Botulinum toxin primarily affects which system in the body?

What is the likely diagnosis for a patient presenting with fever, chills, headache, sensitivity to light, and a marked purple bruise-like rash?

Which of the following statements about Clostridioides difficile infection is true?

What type of toxin is produced by Staphylococcus aureus in food poisoning cases?

If left untreated, the infection from Vibrio cholerae can lead to:

When Streptococcus mutans metabolize sugars, they primarily create:

What significance does the discovery of H. pylori by Drs. Barry Marshall and Robin Warren hold in the history of medicine?

Which food is most frequently connected to Escherichia coli O157:H7 outbreaks?

What is the best approach to stopping an infestation of pinworms?

Which of the following is a symptom common to both bacterial and viral infections transmitted via fecal-oral or foodborne routes?

Which of the following symptoms is associated with the advanced chronic stage of schistosomiasis?

Severe symptoms, such as bloody diarrhea and, in extreme situations, hemolytic uremic syndrome (HUS), are caused by shiga toxin. Which pathogens are linked to infections associated with this toxin?

Which of the following statements about giardiasis is not true?

Helicobacter pylori is a gram-negative, flagellated, & helical bacterium that is responsible for the following, except:

Infection with E. coli 0157:H7 could result in a serious complication that can result in death. Which of the following is the complication that is strongly associated with E.coli 0157:H7?

What are two main types of conditions categorized under 'food poisoning'?