NYS INFECTION CONTROL MANDATED TRAINING
EXAM – PRACTICE EXAM 2026 Update | Complete
Questions with Solutions & Rationales
SECTION I: BASIC PRINCIPLES & THE CHAIN OF INFECTION
1. The chain of infection includes all of the following links EXCEPT:
• A) Infectious agent
• B) Reservoir
• C) Portal of entry
• D) Antibiotic therapy
Rationale: The chain of infection consists of six links: Infectious Agent, Reservoir,
Portal of Exit, Mode of Transmission, Portal of Entry, and Susceptible Host.
Antibiotic therapy (D) is a treatment, not a link in the chain. Breaking any link in
the chain prevents infection transmission.
2. The single most important procedure for preventing the transmission of
infection is:
• A) Wearing gloves
• B) Hand hygiene
• C) Wearing a mask
• D) Disinfecting equipment
Rationale: Hand hygiene is the single most important and basic procedure for
preventing the transmission of infection. It is the cornerstone of all infection
,prevention efforts. Gloves, masks, and disinfection (A, C, D) are additional
measures but do not replace hand hygiene.
3. Normal flora are microorganisms that:
• A) Colonize the body without causing disease under normal conditions
• B) Always cause disease
• C) Are only found in hospitals
• D) Are killed by all antibiotics
Rationale: Normal flora are microorganisms that colonize the body without
causing disease under normal conditions. They provide benefits such as
competitive inhibition of pathogens and vitamin synthesis. They are not always
pathogenic (B), not only found in hospitals (C), and not killed by all antibiotics
(D).
4. An infection that occurs when normal flora take advantage of a weakened
immune system is called a(n):
• A) Exogenous infection
• B) Opportunistic infection
• C) Cross-infection
• D) Iatrogenic infection
Rationale: Opportunistic infections occur when normal flora or environmental
organisms take advantage of a weakened immune system to cause disease.
Exogenous infections (A) come from outside sources. Cross-infections (C) are
transmitted between patients. Iatrogenic infections (D) result from medical
procedures.
,5. Healthcare-associated infections (HAIs) are defined as infections that:
• A) Are present on admission
• B) Develop 48 hours or more after admission
• C) Are always caused by antibiotic-resistant organisms
• D) Only occur in surgical patients
Rationale: Healthcare-associated infections (HAIs) are defined as infections that
develop 48 hours or more after admission to a healthcare facility. They were not
present or incubating at the time of admission. They are not always antibiotic-
resistant (C) and can occur in any patient (D).
6. Which of the following is the most common type of healthcare-associated
infection?
• A) Pneumonia
• B) Urinary tract infection
• C) Surgical site infection
• D) Bloodstream infection
Rationale: Urinary tract infections (UTIs) are the most common HAIs, most
frequently associated with indwelling urinary catheters. While pneumonia,
surgical site infections, and bloodstream infections (A, C, D) are also common,
UTIs remain the most frequently reported HAI.
7. The chain of infection must be broken to prevent transmission. Which of the
following breaks the chain at the "mode of transmission" link?
• A) Immunization
• B) Hand hygiene
• C) Treating the infection
, • D) Wound care
Rationale: Hand hygiene breaks the chain at the mode of transmission link by
removing microorganisms from hands before they can be transmitted to another
host. Immunization (A) breaks the susceptible host link. Treating infection (C)
addresses the infectious agent. Wound care (D) addresses portal of entry.
8. A portal of exit is best described as:
• A) The way a pathogen enters a new host
• B) The route by which an infectious agent leaves its reservoir
• C) The place where a pathogen lives and multiplies
• D) A susceptible person
Rationale: The portal of exit is the route by which the infectious agent leaves the
reservoir (e.g., respiratory tract, gastrointestinal tract, blood). The portal of
entry (A) is how it enters a new host. The reservoir (C) is where it lives. The
susceptible host (D) is the person at risk.
9. Which of the following is NOT a risk factor for healthcare-associated
infections?
• A) Invasive devices
• B) Prolonged hospitalization
• C) Advanced age
• D) Routine hand hygiene
Rationale: Routine hand hygiene (D) is a protective factor that REDUCES
infection risk, not a risk factor. Invasive devices (A), prolonged hospitalization
(B), and advanced age (C) are all risk factors for HAIs. Other risk factors include
severe illness and antibiotic use.
EXAM – PRACTICE EXAM 2026 Update | Complete
Questions with Solutions & Rationales
SECTION I: BASIC PRINCIPLES & THE CHAIN OF INFECTION
1. The chain of infection includes all of the following links EXCEPT:
• A) Infectious agent
• B) Reservoir
• C) Portal of entry
• D) Antibiotic therapy
Rationale: The chain of infection consists of six links: Infectious Agent, Reservoir,
Portal of Exit, Mode of Transmission, Portal of Entry, and Susceptible Host.
Antibiotic therapy (D) is a treatment, not a link in the chain. Breaking any link in
the chain prevents infection transmission.
2. The single most important procedure for preventing the transmission of
infection is:
• A) Wearing gloves
• B) Hand hygiene
• C) Wearing a mask
• D) Disinfecting equipment
Rationale: Hand hygiene is the single most important and basic procedure for
preventing the transmission of infection. It is the cornerstone of all infection
,prevention efforts. Gloves, masks, and disinfection (A, C, D) are additional
measures but do not replace hand hygiene.
3. Normal flora are microorganisms that:
• A) Colonize the body without causing disease under normal conditions
• B) Always cause disease
• C) Are only found in hospitals
• D) Are killed by all antibiotics
Rationale: Normal flora are microorganisms that colonize the body without
causing disease under normal conditions. They provide benefits such as
competitive inhibition of pathogens and vitamin synthesis. They are not always
pathogenic (B), not only found in hospitals (C), and not killed by all antibiotics
(D).
4. An infection that occurs when normal flora take advantage of a weakened
immune system is called a(n):
• A) Exogenous infection
• B) Opportunistic infection
• C) Cross-infection
• D) Iatrogenic infection
Rationale: Opportunistic infections occur when normal flora or environmental
organisms take advantage of a weakened immune system to cause disease.
Exogenous infections (A) come from outside sources. Cross-infections (C) are
transmitted between patients. Iatrogenic infections (D) result from medical
procedures.
,5. Healthcare-associated infections (HAIs) are defined as infections that:
• A) Are present on admission
• B) Develop 48 hours or more after admission
• C) Are always caused by antibiotic-resistant organisms
• D) Only occur in surgical patients
Rationale: Healthcare-associated infections (HAIs) are defined as infections that
develop 48 hours or more after admission to a healthcare facility. They were not
present or incubating at the time of admission. They are not always antibiotic-
resistant (C) and can occur in any patient (D).
6. Which of the following is the most common type of healthcare-associated
infection?
• A) Pneumonia
• B) Urinary tract infection
• C) Surgical site infection
• D) Bloodstream infection
Rationale: Urinary tract infections (UTIs) are the most common HAIs, most
frequently associated with indwelling urinary catheters. While pneumonia,
surgical site infections, and bloodstream infections (A, C, D) are also common,
UTIs remain the most frequently reported HAI.
7. The chain of infection must be broken to prevent transmission. Which of the
following breaks the chain at the "mode of transmission" link?
• A) Immunization
• B) Hand hygiene
• C) Treating the infection
, • D) Wound care
Rationale: Hand hygiene breaks the chain at the mode of transmission link by
removing microorganisms from hands before they can be transmitted to another
host. Immunization (A) breaks the susceptible host link. Treating infection (C)
addresses the infectious agent. Wound care (D) addresses portal of entry.
8. A portal of exit is best described as:
• A) The way a pathogen enters a new host
• B) The route by which an infectious agent leaves its reservoir
• C) The place where a pathogen lives and multiplies
• D) A susceptible person
Rationale: The portal of exit is the route by which the infectious agent leaves the
reservoir (e.g., respiratory tract, gastrointestinal tract, blood). The portal of
entry (A) is how it enters a new host. The reservoir (C) is where it lives. The
susceptible host (D) is the person at risk.
9. Which of the following is NOT a risk factor for healthcare-associated
infections?
• A) Invasive devices
• B) Prolonged hospitalization
• C) Advanced age
• D) Routine hand hygiene
Rationale: Routine hand hygiene (D) is a protective factor that REDUCES
infection risk, not a risk factor. Invasive devices (A), prolonged hospitalization
(B), and advanced age (C) are all risk factors for HAIs. Other risk factors include
severe illness and antibiotic use.
