The Critical Role of Otolaryngologists in Managing Lassa Fever Sequelae: A Call for Action

To the Editor,

Lassa fever, a viral hemorrhagic fever endemic to West Africa, presents significant challenges in both acute management and long-term care. With an estimated 100,000 to 300,000 cases annually, and a high burden in countries such as Nigeria, Sierra Leone, and Liberia, this disease disproportionately affects underserved regions where health care resources are limited. ¹ While much research has been dedicated to improving the treatment and diagnosis of acute Lassa fever, there remains a critical gap in understanding and addressing the long-term sequelae experienced by survivors, notably auditory impairments, require urgent attention from otolaryngologists. This letter emphasizes the critical role of otolarygologists in managing these sequalae and advocate for their increased involvement in Lassa fever recovery.

Studies indicate that up to one-third (35%) of survivors experience varying degrees of hearing impairment, highlighting the urgent need for specialized otolaryngologic care.^2–4 Lassa fever is known to cause sensorineural hearing loss (SNHL), primarily due to its impact on the cochlea. The virus is thought to directly damage the sensory hair cells of the cochlea, which are responsible for converting sound waves into electrical signals for auditory processing. Inflammatory responses triggered by the virus, such as vascular damage and immune-mediated injury to the inner ear, further exacerbate the damage.^5,6 While cochlear damage is the primary mechanism, retrocochlear or central involvement cannot be completely ruled out in severe cases. ⁷

Unfortunately, these long-term effects are often underdiagnosed and understated, leading to poor quality of life and further marginalization of affected individuals. ³ Although, hearing aids are effective for individuals with mild-to-moderate SNHL, their utility may be limited in cases of profound loss or retrocochlear damage. Cochlear implants could provide better outcomes for severe cases, but these interventions are often inaccessible in Lassa fever-endemic regions due to financial and logistical barriers. Intervention is highly meaningful if provided early. Early screening and identification of SNHL in Lassa fever patients enable timely intervention, such as fitting hearing aids or providing auditory training, which can significantly improve quality of life and social integration. Delayed diagnosis often leads to irreversible hearing loss, reduced communication abilities, and psychosocial impacts. ⁸

Otolaryngologists are essential in addressing this gap. Their expertise in diagnosing and managing auditory complications places them at the forefront of improving the lives of Lassa fever survivors. Without their involvement, survivors remain at risk of experiencing progressive hearing loss, social isolation, and communication difficulties, which can have devastating socioeconomic consequences.

To address this critical gap, the following actions are recommended:

1. Early Detection and Intervention: Otolaryngologists should be involved in the early assessment and ongoing monitoring of Lassa fever survivors. Implementing routine and early auditory screenings and timely interventions, such as hearing aids and cochlear implants, can significantly improve patient outcomes, prevent further deterioration, and enhance communication abilities.

2. Multidisciplinary Collaboration: Lassa fever management requires a collaborative approach, with otolaryngologists working alongside infectious disease specialists, neurologists, and rehabilitation experts. This collaboration ensures that both the acute and long-term needs of survivors are met, and that comprehensive care plans are developed, particularly for those with complex auditory and neurological impairments.

3. Rehabilitation Programs: Auditory rehabilitation, including hearing aids, speech therapy, and auditory training, must be prioritized in regions where Lassa fever is endemic. However, access to these services remains limited in many parts of West Africa. Governments and healthcare organizations should invest in expanding these services. Otolaryngologists can play a key role in designing and implementing these services, ensuring that survivors receive the necessary support to improve their quality of life and reintegrate into society.

4. Advocacy and Funding: Increased awareness and advocacy efforts are critical to securing funding for otolaryngology services in Lassa fever-endemic regions. Governments and international health organizations should allocate resources specifically for auditory care and rehabilitation. Advocacy should also highlight the broader relevance of this issue for global health, given increasing population mobility and the potential for cases in nonendemic regions.

5. Global Relevance: Although Lassa fever is endemic to West Africa, the increasing mobility of populations means that international travellers and healthcare providers in nonendemic regions must also be aware of its sequelae. For instance, a U.S. resident recently died from Lassa fever, likely contracted in West Africa. ⁹ This underscores the importance of global awareness and the need for early screening and intervention for returning travellers. Such efforts could prevent long-term complications and enhance outcomes.

In conclusion, otolaryngologists are indispensable in the long-term care of Lassa fever survivors. By prioritizing their involvement in postrecovery management, we can address the often-overlooked auditory sequelae of this disease, providing survivors with the specialized care they need to regain their quality of life. The global health community must recognize and support the role of otolaryngologists in Lassa fever management and act swiftly to integrate their expertise into survivor care.