Healthcare and Sterilization Practices Quiz

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Questions and Answers

What are the factors that affect pressure sterilisation with vapour?

  • Pressure, humidity, temperature, and time (correct)
  • Pressure, humidity, and temperature
  • Pressure, humidity, temperature, and volume
  • Pressure, humidity, time, and load

Which statement about sterilisation methods is incorrect?

  • UV radiation is non-penetrant and its effect is limited to the surface.
  • Millipore cellulose filtration has a threshold of 0.22µm.
  • Filtration effectively stops bacteria and viruses. (correct)
  • Ionising radiations are used for food sterilisation.
  • Ionising radiations are used for sterilising plastic instruments.

What does the Bowie–Dick test evaluate?

  • Whether the desired temperature has been reached.
  • Vapour penetration into the sterilised material. (correct)
  • Inactivation of Bacillus stearothermophilus spores.
  • Effectiveness of air removal from the chamber. (correct)
  • Whether there is excessive humidity present.

Which microorganisms are effectively killed by alcohols?

<p>Gram-positive and Gram-negative bacteria, and spores. (D)</p> Signup and view all the answers

In what situations can a penitentiary doctor deem an inmate unfit for jail?

<p>All of the above. (D)</p> Signup and view all the answers

What type of mortality rate is calculated by dividing the number of deaths from pancreatic cancer by the total number of deaths from all tumours?

<p>Proportional mortality (A)</p> Signup and view all the answers

Given a melanoma incidence of 20 cases per 100,000 people per year and a 5-year survival rate, how many people out of 1,000 would be expected to be affected by melanoma?

<p>1 (A)</p> Signup and view all the answers

What is the formula for calculating exposure odds for healthy individuals in a case-control study?

<p>b / d (C)</p> Signup and view all the answers

Which of the following organizations is NOT considered a Non-Governmental Organization (NGO)?

<p>Bill and Melinda Gates Foundation (A)</p> Signup and view all the answers

Which of these screening tests is NOT considered to be of proven effectiveness for its respective disease?

<p>None of the above (D)</p> Signup and view all the answers

Which factor is NOT considered a component of evidence-based medicine?

<p>Cost-effectiveness analysis (C)</p> Signup and view all the answers

Epidemic curves are primarily used to assess which of the following?

<p>Magnitude of the outcome (D)</p> Signup and view all the answers

Which of the following is NOT considered a risk factor for skin tumors?

<p>Exposure to formaldehyde (A)</p> Signup and view all the answers

What is the most effective prevention measure for scarlet fever?

<p>Antibiotic prophylaxis for close contacts (D)</p> Signup and view all the answers

Which of these factors is NOT a determinant of food safety?

<p>Antibiotic usage (B)</p> Signup and view all the answers

What is the most effective way to prevent the spread of pediculosis?

<p>Avoiding head-to-head contact and sharing combs (B)</p> Signup and view all the answers

What is the recommended prophylaxis for close contacts of a patient with Hepatitis B?

<p>Vaccination (D)</p> Signup and view all the answers

Which of the following is the definition of containment, as it relates to public health?

<p>A measure taken to prevent the spread of a contagious disease by isolating infected individuals. (B)</p> Signup and view all the answers

Which of the following is a specific mortality rate?

<p>Number of deaths from uterine tumors divided by the number of women in the population. (B)</p> Signup and view all the answers

Which of the following is the most likely causal factor in a disease?

<p>All of the above. (D)</p> Signup and view all the answers

Which of the following is a correct statement about disinfection?

<p>Disinfection is the process of reducing the number of microorganisms on an object or surface to a safe level. (C)</p> Signup and view all the answers

What is the main difference between quarantine and containment, as it relates to public health?

<p>Quarantine is used for people who have been exposed to a disease but are not yet showing symptoms, while containment is used for people who are sick with the disease. (A)</p> Signup and view all the answers

Which of the following statements is incorrect about disease regression?

<p>A functional immune system is necessary for disease regression. (C)</p> Signup and view all the answers

Which statements are correct?

<p>Secondary attack rate is equal to: (secondary cases)/(susceptible + primary cases). (C), Contagiousness is the ability of a pathogen to go from one subject to another (@)</p> Signup and view all the answers

Identify the incorrect vector-disease pair from the options below.

<p>Bilharziasis — Phlebotomus spp. (A)</p> Signup and view all the answers

Which infectious disease definition is accurate?

<p>Epidemic: sudden increase of disease incidence. (A)</p> Signup and view all the answers

Which statement regarding disease reservoirs is correct?

<p>Brucellosis has man as the primary reservoir. (D)</p> Signup and view all the answers

Identify the incorrect statement regarding the effects of Staph toxin.

<p>Salting alone is sufficient to destroy salmonella. (A)</p> Signup and view all the answers

Intervention is required at what concentration of legionella in water?

<p>100 CFU/L. (D)</p> Signup and view all the answers

Which handwashing technique is most effective for eliminating transient flora?

<p>Surgical handwashing. (D)</p> Signup and view all the answers

Identify the wrong statement regarding scabies prophylaxis.

<p>No measures need to be taken for cohabitants and contacts. (B)</p> Signup and view all the answers

Which of the following defines civil invalidity for individuals over 18 years old?

<p>Loss of working ability &gt;66% (A), Loss of working potential &gt;33% (C)</p> Signup and view all the answers

What is the formula for calculating perinatal mortality rate?

<p>(Stillbirths + deaths in first week of life) / (live births + stillbirths) (D)</p> Signup and view all the answers

How is the raw mortality rate calculated?

<p>Total deaths / total population (A)</p> Signup and view all the answers

What is defined as late neonatal mortality?

<p>Death after 7 days until before 28 days (C)</p> Signup and view all the answers

Which of the following is NOT a criterion from the Wilson and Junger criteria for screening?

<p>Availability of a vaccine (D)</p> Signup and view all the answers

Which of the following statements is true regarding BOD and COD?

<p>BOD is proportional to organic substance quantity (D)</p> Signup and view all the answers

What indicates excessive water hardness?

<p>Water with &gt;15 French degrees (B)</p> Signup and view all the answers

Which of the following substances are categorized as corrosive?

<p>Substances that cause corrosion (D)</p> Signup and view all the answers

What are the drawbacks of observational studies compared to randomized controlled trials?

<p>They provide a lower level of evidence. (A), They are more susceptible to bias. (D)</p> Signup and view all the answers

What is the main characteristic differentiating the Italian legal definition of cerebral death from the Harvard criteria?

<p>The Italian definition focuses on the cessation of all brain functions, including the brainstem. (B)</p> Signup and view all the answers

Which of the following is NOT a common AIDS prevention measure?

<p>Universal vaccination (D)</p> Signup and view all the answers

Which aspects are considered to be key elements of the definition of burnout?

<p>All of the above (D)</p> Signup and view all the answers

Who can be considered a perpetrator of infanticide?

<p>Any individual who commits the act of killing a child can be considered a perpetrator of infanticide. (D)</p> Signup and view all the answers

What are the crucial features of a screening test?

<p>All of the above (D)</p> Signup and view all the answers

What does the topographic criterion for evaluating a causal link encompass?

<p>All of the above (D)</p> Signup and view all the answers

According to the PNPV 2017–19 plan, who is recommended to receive the HPV vaccine?

<p>All males and females aged 12 years. (A)</p> Signup and view all the answers

Flashcards

LD50

The dose of a substance that is lethal to 50% of the test population.

Secondary attack rate

The proportion of susceptible individuals who develop the disease after contact with an infected individual.

Virulence

The ability of a pathogen to cause disease in a susceptible host.

Contagiousness

The ability of a pathogen to spread from one individual to another.

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Vector

A carrier that transmits a pathogen from one host to another.

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Sporadic disease

A disease that occurs occasionally at unpredictable times and locations.

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Endemic disease

A disease that is constantly present in a population at a stable level.

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Epidemic

A sudden increase in the incidence of a disease in a population.

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What factors influence pressure steam sterilization?

Factors influencing pressure steam sterilization include pressure, humidity, temperature, and time.

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Which statement about sterilization methods is incorrect?

Millipore cellulose filtration removes particles down to 0.22 µm, but it does not always stop viruses.

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What does the Bowie-Dick test assess?

The Bowie-Dick test evaluates the effectiveness of air removal and steam penetration in a sterilization chamber.

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What types of microorganisms are alcohols effective against?

Alcohols effectively kill Gram-positive and Gram-negative bacteria, but not necessarily spores.

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When should a penitentiary doctor intervene?

The penitentiary doctor can intervene if a convict's health status or therapeutic needs are incompatible with prison confinement.

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What does the ratio of pancreatic cancer deaths to total tumor deaths represent?

The proportion of deaths from a specific cause (pancreatic cancer) relative to the total deaths from all tumors.

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Given an incidence rate of 20/100,000 per year and a 5-year survival rate for melanoma, how many people out of 1,000 would be affected?

The expected number of people affected by a disease in a given population based on its incidence and survival rate.

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How is the exposure odds for healthy individuals calculated?

Exposure odds for healthy individuals (those not exposed to the disease) is calculated by dividing the number of unexposed healthy individuals (b) by the number of exposed healthy individuals (d).

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Observational Study

A type of study where researchers observe existing groups or populations to identify patterns and associations between factors and outcomes without manipulating any variables. Unlike randomized controlled trials (RCTs), they don't provide the same level of evidence for cause-and-effect relationships because they rely on collected data from the past.

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Cerebral Death

A clinical criterion used to diagnose cerebral death, characterized by the irreversible cessation of all brain functions, encompassing both the higher brain (consciousness) and the brainstem, leading to a complete absence of brain activity.

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AIDS Prevention Measures

A spectrum of preventative measures against the spread of HIV/AIDS, including educating healthcare professionals and young individuals about the disease, its transmission, and prevention methods. While a vaccine is an important goal, it currently remains unavailable for complete protection against HIV.

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Burnout

A complex syndrome caused by prolonged and unresolved work-related stress. It develops through stages characterized by initial enthusiasm, followed by an adjustment crisis, and ultimately leading to maladjustment. Symptoms can include exhaustion, cynicism, and a sense of reduced accomplishment.

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Infanticide

The act of killing an infant, typically committed by a parent or caregiver. This can be committed by the mother, father, or other caregivers like grandparents.

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Fundamental Characteristics of a Screening Test

A set of key characteristics that make a screening test effective, including the potential for early intervention, affordability, and a high sensitivity for accurately identifying individuals with the disease.

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Topographic Criterion

A criterion for evaluating a causal link between an injury and a subsequent disease or condition. It involves assessing the consistency between the location of the lesion or damage caused by the injury and the anatomical area where the disease developed. This helps determine if the injury could have reasonably led to the disease.

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HPV Vaccine Recommendation

The HPV vaccine is recommended for individuals aged 12 years and older, including both males and females. It is considered a crucial public health measure aimed at protecting against HPV-related cancers.

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Perinatal mortality

The death of a fetus after 28 weeks of gestation or the death of a newborn within the first week of life.

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Crude mortality rate

The number of deaths in a population per 1,000 individuals.

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Late neonatal mortality

The death of a live-born infant between 7 and 28 days of age.

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Case fatality rate (lethality)

The proportion of individuals with a specific disease who die from that disease.

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Disease duration

The average duration of a disease, calculated by dividing the prevalence by the incidence.

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Latent, preclinical stage

A criterion for screening programs stating that a disease should have a readily identifiable latent or preclinical stage.

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Biochemical Oxygen Demand (BOD)

A measure of the oxygen required to biologically degrade organic matter in water.

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Chemical Oxygen Demand (COD)

A measure of the total oxygen required to chemically oxidize all organic and inorganic compounds in water.

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What are NGOs?

Non-governmental organizations (NGOs) are independent, non-profit organizations that operate outside of government authority. They are often involved in humanitarian aid, development, and advocacy work.

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What defines effective mass screenings?

Mass screenings are widespread tests for specific conditions aiming to detect early disease stages. They're considered effective if they improve health outcomes.

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What are the pillars of evidence-based medicine?

Evidence-based medicine prioritizes using the highest quality scientific evidence, alongside clinical expertise and patients' values, to make informed decisions about healthcare.

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What are epidemic curves used for?

Epidemic curves help visualize how a disease spreads over time. This allows researchers to assess how many people are affected, understand the severity of the disease, and potentially identify the source of an outbreak.

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What are some risk factors for skin tumors?

Risk factors for skin tumors include prolonged exposure to UV light, contact with arsenic compounds, leather dust, and polycyclic hydrocarbons.

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How is scarlet fever prevented?

Scarlet fever prevention involves notifying health authorities about new cases and isolating affected individuals for seven days to prevent further spread.

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How is Rubella (German Measles) handled in Italy?

Rubella (German Measles) prevention in Italy includes notifying authorities about new cases, but isolation is not mandated.

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What are the statistics on domestic accidents in Italy?

Domestic accidents in Italy are a significant health concern. Approximately 3 million occur each year, resulting in 1.5 million ER visits, 250,000 hospitalizations, and sadly, 4,000 deaths.

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What is sanitary surveillance?

A continuous, systematic process of gathering, analyzing, and interpreting health data for planning, implementing, and evaluating public health practices.

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What is quarantine?

A measure that isolates healthy individuals who have been exposed to a contagious disease to prevent further spread.

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What is containment?

A measure that isolates sick individuals to prevent the spread of a contagious disease.

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Explain disinfection.

A method used to kill microorganisms on inanimate objects, like surfaces or instruments.

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Explain antisepsis.

The use of antiseptics to kill or inhibit the growth of microorganisms on living tissue, like skin or wounds.

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What is specific mortality?

A specific mortality rate measures the death rate from a particular disease within a specific population.

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What is periodic prevalence?

A measure that combines the number of existing cases at a specific point in time (punctual prevalence) with the number of new cases that occur during a defined period (incidence) to determine the overall prevalence of a disease.

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Define cost-saving prevention.

Preventive actions that not only improve health but also save money in the long run by reducing healthcare costs associated with treating the preventable diseases.

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Study Notes

Ratio Definition

  • Ratio can be defined as: (N/P) × K

Screening Indicators

  • Sensitivity
  • Specificity
  • Relative risk
  • Positive predictive value
  • Negative predictive value

Alma Ata Date

  • 6–12 September 1978

Nitrate Indicators

  • Possible industrial pollution
  • Possible sewage pollution

Drinking Water Wrong Statement

  • Total coliforms up to 5CFU/dL
  • Faecal coliforms up to 5CFU/dL
  • Absent faecal streptococci

Wastewater Classification

  • Classified as intermediate is pH 6.9–7.5
  • Strong if 7.5–8.0
  • Intermediate if BOD (biochemical oxygen demand)/mL >300
  • Strong if COD (chemical oxygen demand)/mL 600–1,000
  • Strong if COD/mL 400–600
  • pH 6.9-7.5 (intermediate)
  • pH 7.5-8.0 (strong)
  • BOD/mL 100-200 to 200-300 to >300
  • COD/mL 165-400 to 400-600 to 600-1,000
  • Sediment (mg/L) 150 to 200-300 to >300 to 500 to 300

Air Effects - Wrong Definition

  • III-degree frostbite: tissue alterations with necrosis
  • Heatstroke: organism cannot give away heat due to elevated T and humidity
  • I-degree frostbite: ischaemia followed by vasodilation and hyperaemia
  • Heatstroke: organism cannot give away heat due to elevated T and humidity and null wind speed

Dangerous Waste Contains

  • Substances toxic for reproduction >0.5%
  • Carcinogenic substances >0.1%
  • Flash point <15°C
  • One or more noxious substances >25%

Particulate Matter

  • Particulate matter 0.01–400µm
  • Aerosol is only solid
  • Smog

Infection and Diseases Definitions

  • Reservoir
  • Carrier
  • Source
  • Healthy carrier
  • Chronic carrier

LD50 and Attack Rate

  • LD50 is the minimal lethal dose
  • Secondary attack rate = (secondary cases)/(susceptible – primary cases)
  • Attack rate = (secondary cases)/(susceptible – primary cases)
  • Virulence does not depend on host
  • Contagiousness is the ability of a pathogen to go from one subject to another

Vectors Wrong Answer

  • Bilharziasis - Glossina palpalis
  • Leishmaniasis - Phlebotomus spp.
  • Trypanosomiasis - Glossina palpalis
  • Yellow fever - Aedes aegypti
  • Malaria - Anopheles

Infectious Disease in Community

  • Sporadic - occasional appearance at high time and distance intervals
  • Endemic - stably present with constant incidence in a population
  • Absence - disease never appeared or disappeared for a long time
  • Epidemic - sudden increase of disease incidence

Human Reservoir Diseases

  • Typhus
  • Shigellosis
  • Syphilis
  • TBC
  • Brucellosis

Statement

  • Staph toxin is heat-resistant
  • Salmonella on foods is destroyed by cooking, boiling, pasteurising
  • Salting and sausage making are sufficient to destroy salmonella
  • HAV transmission is oro-faecal
  • Staph toxin does not alter organoleptic characteristics
  • Mercury: nephrotoxic
  • Cadmium: nephrotoxic
  • Lead: nephrotoxic
  • Intervention is required if legionella is found in water at 100 CFU/L
  • Elimination of transient flora and reduction of resident flora is obtained via surgical handwashing
  • In TBC, chemoprophylaxis is performed on skin-negative close contacts with high risk of disease development, and tuberculin tests and XR are done in positive case.
  • Scabies prophylaxis includes destroying mites and eggs, and washing sheets at 60°C.
  • Pressure sterilization depends on pressure, humidity, temperature, time, and load.
  • Ionising radiations are used in food and plastic instruments
  • Millipore cellulose filtration stops bacteria and viruses, and has a threshold of 0.22µm
  • UV is non-penetrant, its effect limited to the surface

Bowie-Dick Test

  • Reached temperature
  • Air removal
  • Vapour penetration
  • Excess humidity
  • Bacillus stearothermophilus killing

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