Viral Hemorrhagic Fevers in South America: Key Takeaways from a NETEC Webinar

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Hemorrhagic fevers – viral diseases characterized by their ability to cause severe bleeding – are a serious public health concern in some parts of South America. NETEC’s webinar, “Bolivian and Argentine Hemorrhagic Fevers” (originally presented on December 8, 2023), explored the unique challenges these diseases present and highlighted the importance of preparedness to safeguard global and national health security.

Here are some key takeaways from the webinar:

1. Understanding the Arenavirus Family

Bolivian Hemorrhagic Fever (BHF) and Argentine Hemorrhagic Fever (AHF) are both caused by viruses belonging to the Arenaviridae family. These viruses are typically carried by rodents and can cause severe illness in humans. Recognizing the similarities and differences between these viruses is crucial for effective prevention, diagnosis, and treatment.

2. Bolivian Hemorrhagic Fever (BHF): A Shifting Landscape

• At least Two identified Viral Causes: BHF can be caused by different arenaviruses, including the Machupo and Chapare, making diagnosis and treatment more complex. Traditionally the name Bolivian Hemorrhagic Fever refers to disease caused by Machupo virus, while Chapare Hemorrhagic Fever is caused by the homonymous virus.
• Chapare Virus Concerns: The emergence of the Chapare virus, with its high fatality rate, documented person-to-person transmission, and potential for long-term viral persistence, raises significant public health concerns.
• Environmental Factors: Deforestation and agricultural expansion are increasing human-rodent contact, contributing to the spread of BHF.

3. Argentine Hemorrhagic Fever (AHF): Successes and Ongoing Challenges

• Vaccine Success: Argentina’s AHF control program has achieved remarkable success through the development and widespread implementation of a highly effective vaccine.
• Diagnostic Hurdles: The reintroduction of dengue fever and a shift to symptom-based surveillance have complicated AHF diagnosis, highlighting the need for ongoing vigilance and accurate laboratory testing.
• Maintaining Awareness: Even with a vaccine and declining case numbers, healthcare professionals should remain vigilant and keep AHF in their differential diagnosis.

4. Priorities for Prevention and Control

• Rodent Control: Rodent control remains a cornerstone of prevention for both BHF and AHF. Strategies to reduce rodent populations and minimize human exposure are essential.
• Public Health Education: Educating the public about the risks of these diseases, how they are transmitted, and how to prevent them is important for effective disease control.
• Healthcare Training: Training healthcare professionals to recognize and manage these diseases, including providing supportive care and utilizing available treatments like immune plasma, can improve patient outcomes.

5. The Role of Research and Collaboration

• Advancing Scientific Research: Ongoing research is needed to better understand the pathogenesis of these viruses, develop more effective treatments, and explore the long-term consequences of infection.
• International Collaboration: Sharing knowledge and resources between countries and institutions is crucial for advancing research, improving surveillance, and coordinating response efforts.

6. NETEC’s Role in National Health Security

The webinar showcased NETEC’s role in enhancing national health security. As BHF and AHF demonstrate, emerging infectious diseases require strong surveillance, rapid diagnostics, and coordinated responses. NETEC’s training, collaboration, research, and resource development empower healthcare professionals to manage these threats. Its international partnerships further strengthen national and global preparedness. This webinar exemplifies NETEC’s commitment to protecting public health.

NETEC’s Bolivian and Argentine Hemorrhagic Fevers webinar provided valuable insights into the challenges and successes of managing hemorrhagic fevers in South America. By prioritizing prevention, surveillance, and research, healthcare professionals and public health officials can work together to mitigate the risks. NETEC’s contributions to training, education, collaboration, and research continue to play a role in bolstering national health security against high-consequence infectious disease threats.

Resources for Healthcare Professionals

• Course: Bolivian and Argentine Hemorrhagic Fevers
• Webinar: Bolivian and Argentine Hemorrhagic Fevers
• South American Hemorrhagic Fevers: A summary for clinicians
• FAQ: South American Hemorrhagic Fever (SAHF)
• SBAR: South American Hemorrhagic Fever (SAHF)