Publications by authors named "Zhen-dong Tong"
We report a familial cluster of 2019 novel coronavirus disease (COVID-19) to assess its potential transmission during the incubation period. The first patient in this familial cluster was identified during the presymptomatic period, as a close contact of a confirmed patient. Five family members had close contact with this first patient during his incubation period, with four of them confirmed positive for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in the subsequent sampling tests.
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- A child tested positive for coronavirus through a stool sample, despite showing no symptoms.
- This positive test occurred 17 days after the child’s last exposure to the virus.
- The virus was found in stool samples for at least 9 more days, but respiratory tests came back negative.
Article Synopsis
- In January 2020, two families in Zhoushan, Zhejiang Province, China, were reported to have cases of COVID-19.
- The infections were traced back to contact with a traveler from Wuhan, Hubei Province, who was infected but did not show symptoms at the time.
- This highlights how asymptomatic individuals can contribute to the spread of the virus.
Article Synopsis
- Severe fever with thrombocytopenia syndrome (SFTS) is a new infectious disease caused by a bunyavirus, and a meta-analysis was conducted to clarify inconsistent results regarding its seroprevalence among the general population.
- The study analyzed data from 21 research articles, revealing an overall pooled seroprevalence of 4.3% for SFTSV antibodies in China, with regional variations and higher rates among farmers and individuals living close to SFTS patients.
- The findings indicate that seroprevalence is increasing since 2012, showing no significant differences by age or gender, and the results were confirmed to be robust through sensitivity analysis.
[Study on the relationship between contents of poison in fishes and the levels of ocean pollutants in Zhoushan Fishery].
Zhonghua Liu Xing Bing Xue Za Zhi
January 2005
Article Synopsis
- The study aimed to examine the poison levels in various fish from the Zhoushan Fishery and assess their link to ocean pollution.
- The analysis of nine fish types showed that nickel levels exceeded normal limits, while other poisons remained within acceptable ranges.
- Results indicated a positive correlation between certain poisons in fish and ocean pollution levels, suggesting that as pollution increases, so do the poison contents in fish.