What are prions?
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Infectious proteins that do not contain DNA or RNA.
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What are prions?
Infectious proteins that do not contain DNA or RNA.
What is the primary mode of transmission for SARS-CoV-2?
Respiratory droplets (sneeze, cough, speak, sing or breathe).
What is the size of the Japanese Encephalitis Virus?
40-50 nm in diameter.
What are the types of Influenza viruses and their respective characteristics?
Influenza A causes seasonal epidemics and pandemics, infects humans and some animals. Influenza B causes seasonal epidemics and generally infects humans. Influenza C causes mild illness and infects only humans. Influenza D primarily affects cattle and is not known to infect humans.
How is the JE vaccine administered?
Given in a two-dose series (given 28 days apart), given in adults and children, a booster dose should be given (third dose) if a person has received a two-dose primary vaccination or if there is a risk for re-exposure.
How is HIV diagnosed?
Through detection of anti-HIV antibodies and HIV load using tests like ELISA, immunoblot, indirect immunofluorescence, and RT-qPCR.
What is the diameter of the Polio virus virion?
27-30 nm.
What is the composition of the Rabies virus?
It includes envelope, glycoprotein spikes, protein core, and nucleic acid.
What is the characteristic feature of prion diseases in the brain?
Aggregation of fibrils in the brain affecting brain functions.
What is the purpose of anti-retroviral drugs?
To fight and slow down the HIV infection.
What is the role of protease inhibitors in HIV treatment?
They bind to the enzyme protease and inhibit its action, which is needed by HIV to replicate.
What are the symptoms of paralytic poliomyelitis?
Loss of superficial and tendon reflexes, severe muscle aches, spasms of the back and lower limbs, flaccid paralysis.
What is the recommended treatment to prevent the Rabies virus from infecting a person after a bite incident?
Rabies Immune Globulin (RIG) - a fast-acting shot given near the site of the bite, followed by a series of injections within 14 days.
What family does the Rabies virus belong to?
Rhabdoviridae family.
What type of RNA does the Dengue Virus have?
ssRNA, (+) strand.
How many types of Polio virus are there?
Three types: P1, P2, P3, with type 1 being the most common form causing paralytic illness.
Name two types of protease inhibitors used in HIV treatment.
Atazanavir & Cobicistat, Lopinavir & Ritonavir, Darunavir & Cobicistat.
What are some methods of HIV prevention?
Proper education and awareness, barrier protection, safe injection practices, avoiding exposure to relevant body fluids, using protective gear, and having regular check-ups if pregnant.
What are the human prion diseases?
Creutzfeldt-Jakob Disease (CJD), Variant Creutzfeldt-Jakob disease, Gerstmann-Straussler-Scheinker Syndrome, Fatal Familial Insomnia, and Kuru.
What is the incubation period for non-paralytic poliomyelitis?
3-6 days.
Name three types of nucleoside and nucleotide reverse transcriptase inhibitors (NRTIs) used in HIV treatment.
Abacavir, Lamivudine & Zidovudine, Emtricitabine, Tenofovir disoproxil.
What is the recommended vaccine for Polio virus?
Inactivated Polio Vaccine (IPV) and Oral Polio Vaccine (OPV).
How many virus-encoded membrane-associated proteins do DENV virions contain?
2 (E&M proteins).
What are the recommended preventive measures for COVID-19?
Cover mouth when coughing/sneezing, frequent hand washing, vaccination, follow minimum health standards, mass testing and contract tracing.
What are the diseases caused by prions?
Transmissible spongiform encephalopathies (TSEs) including Scrapie disease in sheep, Bovine spongiform encephalopathy, Chronic wasting disease in deer and elk, Kuru in a tribe in Papua Guinea, and Creutzfeldt-Jakob Disease.
What is the incubation period for Rabies virus?
Approximately 30-90 days, with a range of 5 days to 2 years.
What are the key methods for preventing Rabies infection?
Vaccinating pets regularly, keeping pets indoors, protecting pets from stray animals, and reporting stray animals to proper authorities.
Is there a specific treatment for prion diseases?
No, there is no specific treatment, only supportive care.
What is the main cause of encephalitis in Asia?
Japanese Encephalitis (JE) virus.
What are the clinical manifestations of uncomplicated & seasonal influenza?
Acute respiratory infection with symptoms such as chills, headache, dry cough, high fever, muscle aches, malaise, and anorexia.
How is HIV transmitted?
Through sexual contact, blood transfusion, blood products or contaminated needles, and vertical transmission (mother to child).
What is the incubation period of HIV?
2-4 weeks.
What family does the Polio virus belong to?
Picornaviridae.
What is the route of transmission for the Polio virus?
Fecal-oral route and oral-oral route (mouth-fingers-mouth).
How is the Polio virus diagnosed?
Viral isolation through stool, pharynx, cerebrospinal fluid (CSF), or blood; PCR; Serology.
What is the diameter of the Dengue Virus (DENV) virions?
50 nm.
What are the four serotypes of the Dengue Virus?
DENV 1, 2, 3, 4.
What is the purpose of passive immunization against Rabies virus?
To provide the immediate availability of neutralizing antibodies at the site of the exposure.
What are the signs and symptoms of SARS-CoV-2 infection?
Fever, chills, cough, dyspnea, muscle/body ache, headache, fatigue, loss of taste/smell, sore throat, runny nose, nausea/vomiting.
What does HIV stand for?
Human Immunodeficiency Virus.
How does HIV weaken the immune system?
It creates a deficiency of the CD4+ cells of the immune system.
What are the preventive measures for Japanese Encephalitis Virus?
Use mosquito repellant, wear protective clothing, regularly remove stagnant water at home, use a bed net, secure windows and doors at home.
What happens when antibodies bind to the COVID-19 virus?
They stop it from replicating.
What is the function of integrase inhibitors in HIV treatment?
They block the enzyme integrase to infect the T-cells and are often the first line of treatment.
How does the Dengue Virus enter the host cell?
It fuses with the cell and enters through viral receptors.
What is the genus of the Human Immunodeficiency Virus (HIV)?
Lentivirus.
What are the characteristics of the Influenza virus?
Single-stranded, helically shaped, RNA virus of the Orthomyxovirus family, with spherical or filamentous enveloped particles, 80 to 120 nm in diameter, and a helically symmetric nucleocapsid consisting of a nucleoprotein and a multipartite genome of single-stranded antisense RNA in seven or eight segments.
What is the pathogenesis of Japanese Encephalitis Virus in humans?
Infected mosquito bite, goes into the person’s blood viremia/enters the person’s macrophages, enter the blood brain barrier, affects the brain (may also affect basal ganglia, thalamus, midbrain & pons).
What is the recommended treatment for Influenza virus?
Antiviral medicine, best to take within 48 hours after symptoms begin. Antibiotics will not help since a virus causes the flu.
How is the Rabies virus transmitted to humans?
Through infected animal bites (dogs, cats, bats) or licking an open wound by an infected animal.
How does the transformation of normal PrPc to PrPsc occur?
It can occur sporadically, through genetic mutation in the Prp gene, or by induction from nearby abnormal prions, resulting in a chain reaction.
What is the suggested ecological origin of SARS-CoV-2?
Bat populations.
What is the role of Gp120 in HIV?
It is essential for virus entry into the cells and plays a vital role in attachment to specific cell receptors.
What is the temporal pattern of Influenza virus transmission?
October to April in the northern hemisphere, April to September in the southern hemisphere, and year-round in tropical climates.
What is the recommended treatment for Japanese Encephalitis Virus infection?
Paracetamol, increase fluid intake, bed rest, eat nutritious food.
What are the preventive measures for Influenza virus?
Getting vaccinated, practicing proper hygiene, and adopting good health habits.
What is the purpose of active immunization against Rabies virus?
To include antibody and T-cell production in order to neutralize the virus in the body.
Where was the SARS-CoV-2 virus first reported?
Wuhan, China in December 2019.
What are the characteristics of the abnormal folding in the protein caused by prions?
The PrPsc form is heat-resistant, protease resistant, insoluble, and forms aggregates in neural cells, leading to destruction of neural tissues and neurological symptoms.
What is the gold standard for confirming Dengue infection?
Polymerase Chain Reaction (PCR).
What is the recommended treatment for Dengue?
Supportive treatment including paracetamol, increased fluid intake, and bed rest.
What is the global impact of HIV?
It is known to be a global concern.
What are the clinical manifestations of Japanese Encephalitis Virus infection?
May be asymptomatic to life threatening, high grade fever, headache, neck stiffness, nausea & vomiting, disorientation, coma, seizures, spastic paralysis, death.
What is the main component of the HIV capsid?
P24.
What is the main treatment for HIV?
Chemotherapy.
What is the probable function of glycosylphosphatidylinositol-Anchored lipid on neuron plasma membrane lipid rafts?
Cell signaling, homeostatic regulation, influencing synaptic function, and protecting neurons against cell damage.
What is the primary method for diagnosing COVID-19?
RT-PCR through nasopharyngeal swab, oropharyngeal swab, or saliva.
How is Japanese Encephalitis (JE) virus transmitted?
Through a mosquito bite (vector: Culex sp.).
What is the amplification cycle of Japanese Encephalitis Virus during summer time?
Culex bites infected pig or commonly birds, viremia in mosquito, goes to the brain, neuron, salivary gland, bite another pig and/or birds, bite humans (dead end host).
How is Japanese Encephalitis Virus diagnosed?
JEV-specific IgM antibody present in the CSF or serum via IgM-capture ELISA, MRI for brain lesions.
What are the signs and symptoms of acute HIV infection?
Fever, chills, muscle aches, sore throat, fatigue, swollen lymph nodes, and mouth ulcers.
What is the family of the SARS-CoV-2 virus?
Coronaviridae family.
What are the three phases of Dengue Virus infection?
Febrile, Critical, Recovery.
How do mosquitoes get infected with Japanese Encephalitis Virus?
By biting infected pigs (sometimes birds).
What are the types of vaccines available for SARS-CoV-2?
mRNA vaccine, viral vector vaccine, subunit vaccine.
What is the main effect of HIV on the human body?
It weakens the immune system and causes AIDS.
How is the Influenza virus transmitted?
Person to person via large droplets, aerosol transmission of small droplets, exposure to fomites.
What is the function of the viral envelope in HIV?
It is the envelope through which the virus binds.
What are the stages of HIV infection?
Stage 1: Acute HIV infection, Stage 2: Chronic HIV infection, Stage 3: Acquired Immunodeficiency Syndrome (AIDS).
What is the purpose of RT-qPCR in HIV diagnosis?
To monitor the progression of an HIV infection and the effectiveness of chemotherapy by detecting the increase or decrease of the viral load.
What is Reye’s Syndrome and its association with Influenza virus?
An acute encephalopathy of children and adolescents, with swelling in the liver and brain. It is a recognized rare complication of Influenza B, Influenza A, and herpesvirus varicella-zoster infections.
What are the opportunistic infections that occur in the most severe phase of HIV infection?
Pneumocystis pneumonia, esophageal candidiasis, Kaposi’s sarcoma, lymphoma, toxoplasmosis, herpes simplex, cryptococcosis, cryptosporidiosis, tuberculosis, and recurrent bacterial pneumonia.