Risk of Transmission and Viral Shedding From the Time of Infection for Respiratory Syncytial Virus in Households.
Autor: | Otomaru, Hirono, Sornillo, Johanna Beulah T, Kamigaki, Taro, Bado, Samantha Louise P, Okamoto, Michiko, Saito-Obata, Mariko, Inobaya, Marianette T, Segubre-Mercado, Edelwisa, Alday, Portia P, Saito, Mayuko, Tallo, Veronica L, Quiambao, Beatriz P, Oshitani, Hitoshi, Cook, Alex R |
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Předmět: |
PREVENTION of infectious disease transmission
VIRAL physiology HOME environment ACQUISITION of data methodology VIRAL load TIME PREVENTION of communicable diseases AGE distribution RESPIRATORY infections RISK assessment MEDICAL records EPIDEMICS DESCRIPTIVE statistics RESPIRATORY syncytial virus infections STATISTICAL models LONGITUDINAL method ENVIRONMENTAL exposure DISEASE risk factors INFECTIOUS disease transmission |
Zdroj: | American Journal of Epidemiology; Dec2021, Vol. 190 Issue 12, p2536-2543, 8p |
Abstrakt: | Respiratory syncytial virus (RSV) is a leading cause of lower respiratory tract infection worldwide, but reports of temporal changes in the risk of transmission among close contacts has been scarce. This study aimed to examine an association between the viral load trajectory and transmission risk to develop a better control strategy for the disease spread. We conducted a household-based prospective cohort study in Biliran Province, the Philippines, and enrolled 451 participants to observe the development of acute respiratory infection. Including the cases found at the health-care facility, we analyzed the data of viral loads with symptom records obtained from 172 followed participants who had household member positive for RSV with a rapid test during an RSV outbreak in 2018–2019. We developed a model estimating a temporal change in the viral shedding from the infection and evaluated transmission dynamics. We found that most transmission events occurred within approximately 7 days of the household exposure, including potential presymptomatic transmissions. The inferred risk of infection among those younger than 5 years was 3.5 times higher than that of those older than 5 years. This finding suggested that the initial week after the household exposure is particularly important for preventing RSV spread. [ABSTRACT FROM AUTHOR] |
Databáze: | Complementary Index |
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