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Which of the following terms measures the association between the exposure and the outcome?
A) P value
B)Risk ratio
C)Standard deviation
D)Confidence interval
C)Standard deviation
D)Confidence interval
Explanation:
The correct option is B) Risk ratio.
Risk ratio, also known as relative risk, is a measure of association used in epidemiology to quantify the strength of the relationship between an exposure and an outcome. It compares the risk of the outcome in the exposed group to the risk in the unexposed group.
An odds ratio (OR) is a similar measure of association often used in case-control studies, and for rare diseases, it approximates the risk ratio.
❌ A) P value: The P value indicates the statistical significance of a result (i.e., how likely the observed effect is due to chance), but it does not measure the magnitude or strength of the association itself.
❌ C) Standard deviation: The standard deviation measures the variability or dispersion of data points around the mean in a single variable; it does not measure the association between two different variables (exposure and outcome).
❌ D) Confidence interval: A confidence interval provides a range of plausible values for the true measure of association (like the risk ratio or odds ratio) in the population, along with a level of certainty. It indicates the precision of the estimate, but not the association itself.
Which of the following bacteria is involved in the development of dental carries ? A)Streptococcus mutans
B) Listeria monocytogenes
C) Streptococcus
D) Corynebacterium diphtheria
Explanation:
The correct option is A) Streptococcus mutans.
Streptococcus mutans is considered the primary bacterium responsible for the initiation and development of dental caries (cavities). It metabolizes sugars from dietary carbohydrates to produce acids, such as lactic acid. These acids demineralize the tooth enamel, leading to the formation of cavities over time.
S. mutans also produces glue-like extracellular polysaccharides (glucans) that help form a robust biofilm (plaque) and adhere firmly to the tooth surface.
❌B) Listeria monocytogenes is a foodborne pathogen that causes listeriosis, a serious infection, but it is not involved in dental caries.
❌C) Streptococcus is a broad genus of bacteria. While Streptococcus mutans is part of this genus, other species within the genus (e.g., S. sanguinis, S. gordonii) are often associated with oral health or other diseases, not specifically the initiation of caries.
❌D) Corynebacterium diphtheriae is the bacterium that causes diphtheria, a severe respiratory illness, not dental caries.
A 3-year-old girl with symptoms of cough for the past 2 days came to the clinic with her mother. She has no fever and no other symptoms. Which of the following is the appropriate recommendation ?
A) Vicks
B)Honey
C)Diphenhydramine
D)Dextromethorphan
Explanation:
The correct option is B. Honey.
Honey is considered a suitable option for a 3-year-old girl with a cough from a common cold. Research indicates that honey may be more effective than some common cough suppressants in lessening cough frequency and severity, and potentially improving sleep for both the child and parents. It is thought to work by soothing the throat and coating cough receptors.
This child is 3 years old, has a mild cough, and no red-flag symptoms—supportive care is appropriate.
❌A) Vicks: Vicks (or other Camphor/menthol-containing products) is not recommended for children under two years old and should be used cautiously in young children. The children's version is for ages two and older, but generally, the American Academy of Pediatrics does not recommend over-the-counter (OTC) cough medicine for young children.
❌C) Diphenhydramine: Diphenhydramine is often found in OTC cough medicines, but health authorities typically do not recommend using cough medicine in children under 4 to 6 years of age.
❌D) Dextromethorphan: Dextromethorphan is a cough suppressant in many OTC products. Similar to diphenhydramine, health bodies like the American Academy of Pediatrics advise against giving cough and cold medicines containing dextromethorphan to young children due to concerns about effectiveness and potential side effects.
Which of the following hormones stimulate mammary gland development and milk production ?
A)Prolactin
B) Oxytocin
C) Corticotropin
D)Growth hormone
Explanation:
The correct option is A) Prolactin. Prolactin is responsible for both the development of the mammary glands (specifically the alveoli) and the production of milk.
Prolactin is a hormone secreted by the anterior pituitary gland. It directly stimulates the epithelial cells within the mammary alveoli to synthesize milk components like lactose, casein, and lipids. Prolactin levels increase significantly during pregnancy and are sustained by infant suckling after birth to maintain milk production (lactogenesis).
❌B) Oxytocin: Oxytocin, also released by the pituitary gland (but made in the hypothalamus), is responsible for the milk let-down reflex (milk ejection), not milk production. It causes the myoepithelial cells around the alveoli to contract and push milk into the ducts.
❌C) Corticotropin: Corticotropin (also known as Adrenocorticotropic Hormone or ACTH) stimulates the adrenal glands to produce cortisol and other hormones, primarily involved in stress response, metabolism, and blood pressure regulation. It does not directly stimulate mammary gland development or milk production.
❌D) Growth hormone: Growth hormone (GH) affects general growth and development, stimulates protein production, and impacts fat distribution. While it is part of the same hormone family as prolactin and plays a general supporting role in mammary gland development, it is not the primary hormone for stimulating milk production itself.
A patient visits pharmacy with fever and cough but has no prescription. Patients requests for acetaminophen, dextromethorphan syrup, glycerin suppository and amoxicillin 500mg capsules. Which of the following needs prescription for delivery?
A)Amoxicillin capsules
B)Glycerin suppository
C) Acetaminophen tablet
D)Dextromethorphan syrup
Explanation:
The correct option is A. Amoxicillin capsules.
Amoxicillin is an antibiotic used to treat bacterial infections and is available only with a doctor's prescription. It will not work for viral infections like the common cold or flu, which often cause fever and cough. Since the patient presents with a fever and cough, an antibiotic would be inappropriate without a professional medical diagnosis and prescription.
Dispensing antibiotics without a prescription is inappropriate due to risks of antimicrobial resistance, incorrect indication, and adverse effects.
B) Glycerin suppository is used to treat constipation and is available over-the-counter (OTC) without a prescription.
C) Acetaminophen tablet (also known as paracetamol) is a common pain reliever and fever reducer that is widely available as an OTC medication without a prescription.
D) Dextromethorphan syrup is a cough suppressant available as an OTC product and is a common ingredient in many non-prescription cough and cold medications.
What is the main method transmission of Brucella species ?
A )Airborne
B) Blood transfusion
C) Contact with infected person
D) ingestion of unpasteurized milk /milk products
Explanation:
The correct option is D) ingestion of unpasteurized milk /milk products.
The primary and most common method of transmission of Brucella species to humans, especially in endemic areas, is through the ingestion of unpasteurized milk and dairy products, such as raw cheese. Brucella bacteria are shed in large quantities in the milk of infected animals (cattle, goats, sheep, etc.). Pasteurization is an effective heat treatment process that kills the bacteria, making the products safe for consumption.
❌A) Airborne: Airborne transmission can occur, particularly in occupational settings like slaughterhouses or laboratories where the bacteria can be aerosolized, but it is not the main method of transmission for the general population.
❌B) Blood transfusion: Transmission through blood transfusion has been reported in rare cases, but it is not a common or main method.
❌C) Contact with infected person: Person-to-person transmission is extremely rare, though cases have been documented through breastfeeding, sexual contact, and tissue transplants. The disease is primarily a zoonosis (animal-to-human transmission).
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