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Question 1
Incorrect
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A health professional plans to visit Brazil but has recently come to know that there is epidemic of West Nile virus there. Regarding the virus, which of the following is true?
Your Answer: Infection is non-fatal
Correct Answer: May be associated with poliomyelitis-like paralysis
Explanation:The correct statement regarding the West Nile virus is that it may be associated with poliomyelitis-like paralysis. This is because the virus can affect the anterior horn cells, leading to symptoms similar to poliomyelitis such as flaccid paralysis.
The other statements are not true:
– Infection with West Nile virus can be fatal, especially if not treated promptly.
– West Nile virus is a member of the Flaviviridae family, not the picornavirus family.
– Transplacental transmission of West Nile virus can occur, leading to complications in newborns.
– Treatment with interferon is effective in West Nile virus encephalitis, along with other medications such as IV immunoglobulin and Ribavirin. -
This question is part of the following fields:
- Epidemiology
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Question 2
Incorrect
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An 8 year old boy presented with easy bruising following falls. FBC showed leukocytosis and thrombocytopenia with normal haemoglobin levels. His ESR was high and Paul-Bunnell test was positive. Which of the following is the most probable diagnosis?
Your Answer: Idiopathic thrombocytopenic purpura (ITP)
Correct Answer: Glandular fever
Explanation:This question presents a case of an 8-year-old boy with easy bruising following falls, leukocytosis, thrombocytopenia, high ESR, and a positive Paul-Bunnell test. The most probable diagnosis in this case is glandular fever, also known as infectious mononucleosis, caused by the Epstein-Barr virus (EBV).
Glandular fever is characterized by symptoms such as fatigue, fever, sore throat, and swollen lymph nodes. Leukocytosis is a common finding in infectious mononucleosis, and thrombocytopenia can also occur. The elevated ESR and positive Paul-Bunnell test further support the diagnosis of glandular fever in this case.
Idiopathic thrombocytopenic purpura (ITP) is a condition characterized by low platelet counts, but in this case, the combination of symptoms and test results point more towards glandular fever. Trauma and non-accidental injury (NAI) are less likely causes in this scenario, as the symptoms are more consistent with an underlying infectious process. Septicaemia is also less likely given the specific findings in this case.
In conclusion, the most probable diagnosis for this 8-year-old boy with easy bruising, leukocytosis, thrombocytopenia, high ESR, and a positive Paul-Bunnell test is glandular fever (infectious mononucleosis) caused by the Epstein-Barr virus.
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This question is part of the following fields:
- Microbiology
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Question 3
Incorrect
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What is the decision criteria for switching existing clients to DTG-containing regimens who have been on a PI-containing regimen for more than two years?
Your Answer: Clients must show no signs of drug resistance.
Correct Answer: Clients who have failed a previous regimen should be considered for switching regardless of viral load.
Explanation:The guidelines outline the criteria for switching existing clients to DTG-containing regimens for those who have been on PI-based regimens for more than two years. The decision to switch is dependent on the client’s viral load in the last 12 months, and even clients who have failed a previous regimen are considered for switching to a DTG-containing regimen, regardless of their viral load, aiming to optimize their treatment.
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This question is part of the following fields:
- Clinical Evaluation
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Question 4
Correct
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A 17-year-old man presents with fever and extensive pre-auricular swelling on the right side of his face. However, tenderness is present bilaterally. He also complains of acute pain and otalgia on the right aspect of the face. What is the most likely diagnosis?
Your Answer: Mumps
Explanation:The most likely diagnosis for this 17-year-old man with fever, pre-auricular swelling, bilateral tenderness, and acute pain and otalgia on the right side of his face is mumps. Mumps is a viral infection that typically presents with a prodromal phase of general malaise and fever, followed by painful swelling of the parotid glands. It is common for the swelling to be bilateral in mumps.
The other options provided in the question are not consistent with the symptoms described. Acute mastoiditis would typically present with ear discharge, headache, and hearing loss in addition to otalgia. Acute otitis externa would present with ear discharge, itching, and otalgia, but not necessarily with pre-auricular swelling. Acute otitis media would present with specific findings upon otoscopy, and otitis media with effusion would typically present with hearing loss as the main symptom.
Therefore, based on the symptoms described, mumps is the most likely diagnosis for this patient.
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This question is part of the following fields:
- Microbiology
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Question 5
Correct
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Which of the following microbes binds strongly to CD4 antigen:
Your Answer: HIV
Explanation:The question is asking which microbe binds strongly to the CD4 antigen. The correct answer is HIV. HIV, or Human Immunodeficiency Virus, primarily infects CD4+ T helper cells by binding to the CD4 antigen on the surface of these cells. This binding allows the virus to enter the T cells and replicate, leading to progressive depletion of T cells and impaired immune function.
Plasmodium falciparum is a parasite that causes malaria and does not bind to the CD4 antigen. Mycoplasma tuberculosis is a bacterium that causes tuberculosis and does not bind to the CD4 antigen. Treponema pallidum is a bacterium that causes syphilis and does not bind to the CD4 antigen. Epstein-Barr virus is a virus that causes infectious mononucleosis and does not bind to the CD4 antigen.
Overall, HIV is the microbe that binds strongly to the CD4 antigen, leading to its ability to infect and replicate within CD4+ T cells.
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This question is part of the following fields:
- Microbiology
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Question 6
Incorrect
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A pregnant female recently underwent her antenatal screening for HIV and Hepatitis B. Which of the following additional tests should she be screened for?
Your Answer: Syphilis and Toxoplasma
Correct Answer: Rubella, Toxoplasma and Syphilis
Explanation:During pregnancy, it is important for women to undergo screening for certain infectious diseases that can potentially harm the fetus. HIV and Hepatitis B are two infections that can be transmitted from mother to baby during pregnancy, childbirth, or breastfeeding. Therefore, it is crucial to screen for these infections in pregnant women to prevent transmission to the baby.
In addition to HIV and Hepatitis B, pregnant women should also be screened for Rubella, Toxoplasma, and Syphilis. Rubella is a viral infection that can cause serious birth defects if contracted during pregnancy. Toxoplasmosis is a parasitic infection that can also lead to birth defects or complications in the baby. Syphilis is a sexually transmitted infection that can be passed from mother to baby during pregnancy and can result in serious health issues for the baby.
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This question is part of the following fields:
- Microbiology
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Question 7
Correct
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Which of the following drugs have the best gram positive cover?
Your Answer: Glycopeptides
Explanation:The question is asking which of the listed drugs has the best coverage for gram positive bacteria.
Glycopeptides, such as vancomycin and teicoplanin, are known for their excellent coverage of gram positive bacteria, particularly gram positive cocci like Staphylococcus and Streptococcus species. They are often used to treat serious infections caused by these organisms, such as MRSA (methicillin-resistant Staphylococcus aureus) infections.
Cephalosporins have a broad spectrum of activity, covering both gram positive and gram negative bacteria. However, they are not as effective against gram positive bacteria as glycopeptides.
Aminoglycosides, such as gentamicin and amikacin, are primarily active against gram negative aerobic bacteria and are not typically used for gram positive infections.
Quinolones, like ciprofloxacin and levofloxacin, are mainly effective against gram negative bacteria and are not commonly used for gram positive infections.
Monobactams, such as aztreonam, are primarily used for infections caused by gram negative bacteria and do not have good coverage for gram positive bacteria.
Therefore, the drug with the best gram positive coverage among the options listed is Glycopeptides.
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This question is part of the following fields:
- Pharmacology
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Question 8
Correct
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When is Enhanced Adherence Counseling (EAC) indicated for patients struggling with adherence to treatment?
Your Answer: For patients with challenges remembering to take their treatment.
Explanation:Enhanced Adherence Counseling (EAC) is particularly indicated for patients facing challenges with remembering to take their treatment, as part of efforts to tackle barriers to good adherence. It focuses on providing patients with practical skills to adhere to ART and developing an individualized adherence plan.
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This question is part of the following fields:
- Counselling
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Question 9
Correct
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What is the recommended treatment for cryptococcal meningitis in adults, adolescents, and children living with HIV who test positive for cryptococcal antigen (CrAg) in cerebrospinal fluid (CSF)?
Your Answer: Combination therapy with amphotericin B and fluconazole
Explanation:Cryptococcal meningitis is a serious fungal infection that affects the brain and spinal cord, particularly in individuals with weakened immune systems such as those living with HIV. The recommended treatment for cryptococcal meningitis in this population is combination therapy with amphotericin B and fluconazole.
Amphotericin B is a potent antifungal medication that is effective in treating cryptococcal meningitis. It is typically administered intravenously to achieve high levels in the cerebrospinal fluid where the infection is located. However, amphotericin B can have significant side effects, including kidney toxicity, which is why it is often used in combination with another antifungal medication.
Fluconazole is an oral antifungal medication that is also effective in treating cryptococcal meningitis. When used in combination with amphotericin B, fluconazole helps to enhance the effectiveness of the treatment and reduce the risk of relapse. This combination therapy has been shown to improve outcomes and reduce mortality rates in patients with cryptococcal meningitis.
Overall, combination therapy with amphotericin B and fluconazole is the recommended treatment for cryptococcal meningitis in adults, adolescents, and children living with HIV who test positive for cryptococcal antigen (CrAg) in cerebrospinal fluid (CSF). It is important for healthcare providers to closely monitor patients receiving this treatment to ensure optimal outcomes and manage any potential side effects.
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This question is part of the following fields:
- Pharmacology
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Question 10
Correct
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When should ART initiation be deferred for clients diagnosed with cryptococcal meningitis?
Your Answer: Until 4-6 weeks of antifungal treatment has been completed
Explanation:Cryptococcal meningitis is a serious fungal infection that affects the membranes surrounding the brain and spinal cord. It is important to defer ART initiation for clients diagnosed with cryptococcal meningitis until 4-6 weeks of antifungal treatment has been completed because starting ART too soon can lead to a condition known as immune reconstitution inflammatory syndrome (IRIS).
IRIS occurs when the immune system begins to recover and responds aggressively to the infection, causing inflammation and potentially worsening symptoms. By waiting until the antifungal treatment has had time to reduce the fungal burden and stabilize the infection, the risk of developing IRIS is minimized.
Therefore, it is crucial to prioritize treating the cryptococcal meningitis first before starting ART in order to ensure the best possible outcome for the client.
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This question is part of the following fields:
- Clinical Evaluation
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