Abstract
We are reporting a casewith hearing loss following krait snake bite.Casewasdiagnosed as snake bite and treated in the emergency department and after stabilising she was referred to the oto-rhinolaryngology department for evaluation of sudden hearing loss. Audiological evaluation was carried out to identify degree, type of hearing loss and site of lesion. Puretone audiometry showed bilateral moderate sensory neural hearing loss. Thediagnosis was confirmed with Transient evokedotoacoustic emissions and Click evoked auditory brainstem response testing. From theaboveaudiologicaltests it is evident that the snake bite victim has cochlear hearing loss. This could be due to the venom carried away from the wound by the lymphatics and then is circulated by the bloodstream throughout the body.
Highlights
On June 9th, 2017 WHO categorized snakebite envenomation into the Category A of the Neglected Tropical Diseases
We are reporting a case with amoderate degree of sensorineural hearing loss caused by cochlear damage due to snake bite
We tried to emphasize that any patients with history of snake bite should undergo hearing evaluation
Summary
On June 9th, 2017 WHO categorized snakebite envenomation into the Category A of the Neglected Tropical Diseases. Rural populationare the major victims of snake bites. Hearing lossis a rare symptom followed by snake bite[1]. Few cases on hearing loss following snake bite are reported in the literature [2]. The venom of Bungaruscaeruleus (krait) contains a mixture of alpha, beta-bungarotoxin and caerulotoxin. Alpha-bungarotoxins cause failure of neuromuscular transmissionby binding to post synaptic nAchR at neuromuscular junction, Beta-bungarotoxins arepresynaptically active neurotoxic phospholipases. Exposureto these toxins causes the failure of neuromuscular transmission and depletion ofsynaptic vesicles from the nerve terminal
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