Marfan syndrome

Disease Description (Causes and Symptoms)

• Definition/Cause: Marburg hemorrhagic fever is an acute hemorrhagic febrile disease caused by the Marburg virus (an RNA virus in the filovirus family). The natural host is known to be primarily fruit bats (Rousettus spp.).
• Transmission: It is transmitted through direct contact with the blood, body fluids, or secretions of an infected person; contaminated syringes or medical equipment; and close contact with a patient. Laboratory-acquired infection cases have also been reported.
• Incubation period: Generally 5–10 days (2–21 days according to some literature).
• Main symptoms (course): Initially, nonspecific systemic symptoms such as high fever, chills, headache, muscle pain, and malaise → gastrointestinal symptoms such as sore throat, vomiting, and diarrhea develop within 2–3 days → may then progress to bleeding (including in the oral cavity, gastrointestinal tract, and skin and mucous membranes), systemic vascular and coagulation disorders, shock, and multiple organ failure.
• Pathophysiology summary: The virus proliferates in macrophages and dendritic cells, disrupting immune responses and causing vascular endothelial injury and abnormalities in the coagulation system (such as disseminated intravascular coagulation [DIC]), leading to multiple organ damage.

Treatment

• Basic principles: Since there is generally no specific approved antiviral medication, early diagnosis followed by intensive supportive care is the core of treatment.
  • Aggressive fluid and electrolyte replacement (intravenous fluids), hemodynamic monitoring, and, if necessary, vasoactive fluids/vasoactive agents (vasopressors).
  • Oxygen therapy and respiratory support (mechanical ventilation if necessary).
  • Emergency treatment in cases of bleeding, including blood transfusion (arteriovenous system replenishment) and replacement of coagulation factors.
  • Appropriate antibiotics if a secondary bacterial infection is suspected.
  • Intensive care at the level of an intensive care unit may be necessary.
• Experimental and investigational treatments: Some antiviral drugs (e.g., ribavirin and remdesivir) and monoclonal antibodies and vaccine candidates are in the research and clinical trial stages; however, the medications approved as standard treatment are limited. Availability depends on the clinical situation and regulatory authority guidelines.
• Infection control (essential during treatment): Patients must be isolated; medical personnel must use appropriate personal protective equipment (PPE) in preparation for standard, droplet, contact, and possible airborne transmission; and the handling of contaminated materials and hazardous waste must be strictly implemented. Safety guidelines must also be followed when handling bodies.
• Prognosis: The case fatality rate varies depending on the outbreak and access to treatment, but has been reported to be high (the provided material lists it as approximately 25%). Early supportive care affects the prognosis.
• Complications and sequelae: Multiple organ failure, renal failure, and neurological complications may occur; survivors may experience sequelae such as fatigue, psychological effects, and ophthalmic or auditory effects.

Checklist Before an Outpatient Visit (Including Recommended Items and Sample Questions)

• Recommended items to bring
  • A list of medications currently being taken (prescription drugs, over-the-counter drugs, and supplements)
  • Past medical history (chronic diseases, use of immunosuppressants, and whether you are pregnant)
  • Recent test results (blood tests, imaging, etc., if available)
  • Recent travel and exposure history (travel destinations, contact with wild animals or bats, and whether you have been in contact with an infected person)
  • The date and time symptoms began and their progression (temperature records, presence or absence of bleeding, urine output, etc.)
• Key information to tell medical personnel before the consultation
  • Whether you have visited an area where Marburg is endemic, such as Africa, within the past 3 weeks
  • Whether you have had contact with bats or wild animals, or possible exposure through water or blood
  • Current symptoms such as fever, diarrhea, vomiting, or bleeding, and when they began
• What to submit or explain to medical personnel during the visit
  • The date symptoms began and photographs showing changes in symptoms (such as skin rashes or bleeding)
  • A list of contacts (family members and coworkers) and a history of exposure at events or medical facilities

Examples of General Questions to Ask a Doctor

• What tests are used to confirm this disease, and when can I receive the test results?
• What emergency measures or hospitalization are needed for my current symptoms?
• What are the side effects and interactions of the medications being used for treatment?
• What isolation and preventive measures should family members or people living with me take?
• What is the expected course after recovery (prognosis), and will follow-up testing be necessary?

Examples of Disease-Specific Questions

• The area I recently visited (or the person I met) is a Marburg risk area (or an infected person). How are the timing and type of testing (genetic testing/PCR) determined?
• Is there any preventive treatment or vaccine that can be used after exposure (or contact)? If so, how can I access it and when should it be administered?

(Note) If you have suspected symptoms or believe you may have been exposed to Marburg hemorrhagic fever, contact the public health authorities or a medical institution immediately and undergo testing, isolation, and treatment according to their instructions.