Table 1. Summary of LF-induced SNHL case studies.

Case No. [Ref.]	Location	Symptoms	Confirmation of LASV	Treatment	Onset of Hearing Loss	Unilateral or Bilateral Hearing Loss	Follow-up of Hearing Loss
1 [28]	Nigeria	Headache, chest pain, diarrhea, vomiting, high fever	LASV detected in serum and serum positive for LASV antibodies	No specific treatment for LF	13 days after onset of fever	Not reported	Present several months later
2 [30]	Liberia	Fever, chills, weakness, diarrhea, cough, lower abdominal and lumbosacral pain, pharyngitis, maculopapular rash on face, headache, lymphadenopathy, periorbital edema, conjunctivitis, vomiting	LASV detected in serum and serum positive for LASV antibodies	No specific treatment for LF	17 days after onset of fever	Unilateral	No follow-up performed
3 [32]	Sierra Leone	Fever, abdominal pain, chills, headache, myalgia, arthralgia, conjunctival injection, lymphadenopathy	Serum positive for LASV antibodies	No specific treatment for LF	Upon entering convalescence phase	Unilateral	Still present upon discharge
4 [33]	Nigeria	High fever, vomiting, abdominal pain, diarrhea, sore throat, difficulty swallowing	rt-PCR	10-day ribavirin	While taking ribavirin	Unilateral	Still present after 4 years; uses hearing aid
5 [33]	Nigeria	High fever	rt-PCR	10-day ribavirin	8 days after onset of fever	Bilateral	Still present after 1 year
6 [34]	Liberia	Fever, nausea, arthralgia, headache, diarrhea, personality changes, encephalitis	LASV detected in serum and CSF	No specific treatment for LF	22 days after onset of symptoms	Bilateral	Still present 2 months later

Abbreviations: CSF, cerebral spinal fluid; LASV, Lassa virus; LF, Lassa fever; rt-PCR, reverse transcriptase polymerase chain reaction; SNHL, sensorineural hearing loss.