This study aimed to assess the central auditory functions of endemic disease control agents. This cross-sectional cohort study comprised two groups: the exposed group, with 38 male endemic disease control agents with simultaneous occupational noise and pesticide exposure; and the control group, with 18 age- and sex-matched workers without occupational noise and/or pesticide exposure. All participants underwent pure-tone audiometry, brainstem auditory evoked potentials, dichotic digits test, and transient-evoked otoacoustic emissions suppression effect. There was a significant inter-group difference in waves III and V absolute latencies, and interpeak I–III and I–V latencies bilaterally, with worse results found in the exposed group. Abnormal dichotic digits test results occurred more often in the exposed group, with a significant association between pesticide- and noise-exposure and the abnormal results (p = 0.0099). The transient-evoked otoacoustic emissions with suppression effect did not yield significant inter-group differences. It was concluded that pesticide and noise exposure induce harmful effects on the central auditory functions, particularly on the brainstem and figure-ground speech-sound auditory skills.

RESUMO A COVID-19 é uma infecção viral que afeta, principalmente, a via respiratória inferior e, com a afinidade da proteína Spike com a Enzima Conversora de Angiotensina 2, gerando estado protrombótico, pode haver comprometimento dos sistemas cardiovasculares, nervoso central e renal. As infecções virais são capazes, também, de causar alterações nos sistemas auditivo e vestibular. O presente estudo teve por finalidade apresentar os achados auditivos e vestibulares de uma mulher sem queixas otoneurológicas, previamente à infecção pela SARS-CoV-2. Trata-se de um relato de caso longitudinal, com apresentação da evolução do quadro clínico otoneurológico acompanhado de uma bateria de exames. Os resultados evidenciaram o aparecimento de uma perda auditiva neurossensorial unilateral prevista por emissões otoacústicas alteradas na presença limiares tonais normais. Com a sequência de exames, observou-se piora dos limiares auditivos e alteração da função vestibular, de maneira permanente, sem qualquer outro histórico que pudesse justificar a instalação do quadro. Em quadros infecciosos faz-se importante a longitudinalidade de avaliação com uso de protocolo completo de exames para melhor compreensão dos efeitos tardios.

COVID-19 is a viral infection that mainly affects the lower respiratory tract and with the affinity of the Spike protein to the Angiotensin 2 converter enzyme, inducing a prothrombotic state which may lead to compromising of the cardiovascular, central nervous, auditory, and vestibular systems. Viral infections knowingly affect vestibular and auditory systems. This study aimed to present the auditory and vestibular findings of a woman without otoneurological complaints, before the infection with SARS-CoV-2. This is a longitudinal case report, presenting the evolution of the otoneurological clinical picture accompanied by the results of a battery of tests. The results evidenced a unilateral, permanent, cochlear sensorineural hearing loss through altered otoacoustic emissions albeit with normal tonal thresholds, accompanied by peripheral vestibular hypofunction which worsened with time, without any other factor that could justify these findings. This study shows the importance of the complete protocol of tests performed over time for a better understanding of long-time implications of the SARS-CoV-2 infection.