The SARS-CoV-2 B.1.351 Variant Can Transmit in Rats But Not in Mice.

The SARS-CoV-2 B.1.351 Variant Can Transmit in Rats But Not in Mice.
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DOI:
10.3389/fimmu.2022.869809
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发表时间:
2022
影响因子:
7.3
通讯作者:
--
中科院分区:
医学2区
文献类型:
--
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先前的研究表明,B.1.351和其他变体已将严重急性呼吸综合征冠状病毒2 (SARS-CoV-2)的宿主范围扩展到小鼠。持续传播是病毒在人群中维持的先决条件。然而,迄今为止,没有证据表明SARS-CoV-2在野生小鼠中自然传播。在这里,我们评估了B.1.351变异在小鼠和大鼠中的复制和接触传播。B.1.351变异体能在小鼠和大鼠气道中高效感染和复制。此外,B.1.351变异不能在BALB/c或C57BL/6小鼠中传播,但可以通过直接接触在大鼠中传播。此外,B.1.351变异体不会从接种的叙利亚仓鼠传播给BALB/c小鼠。此外,小鼠适应的SARS-CoV-2菌株C57MA14没有在小鼠中传播。综上所述,B.1.351变异体在小鼠中的传播风险极低,但在大鼠中的传播风险不容忽视。我们应该更加关注SARS-CoV-2变体在大鼠中的潜在自然传播及其可能溢出到人类的可能性。
Previous studies have shown that B.1.351 and other variants have extended the host range of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) to mice. Sustained transmission is a prerequisite for viral maintenance in a population. However, no evidence of natural transmission of SARS-CoV-2 in wild mice has been documented to date. Here, we evaluated the replication and contact transmission of the B.1.351 variant in mice and rats. The B.1.351 variant could infect and replicate efficiently in the airways of mice and rats. Furthermore, the B.1.351 variant could not be transmitted in BALB/c or C57BL/6 mice but could be transmitted with moderate efficiency in rats by direct contact. Additionally, the B.1.351 variant did not transmit from inoculated Syrian hamsters to BALB/c mice. Moreover, the mouse-adapted SARS-CoV-2 strain C57MA14 did not transmit in mice. In summary, the risk of B.1.351 variant transmission in mice is extremely low, but the transmission risk in rats should not be neglected. We should pay more attention to the potential natural transmission of SARS-CoV-2 variants in rats and their possible spillback to humans.
DOI: 10.3389/fimmu.2022.821664
发表时间: 2022
影响因子: 7.3
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发表时间: 2021-01-08
期刊: Science (New York, N.Y.)
影响因子: --
作者:
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DOI: 10.1007/s00705-022-05385-y
发表时间: 2022-04
影响因子: 2.7
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