Impact of the COVID-19 pandemic on norovirus circulation in Germany

Jacobsen, Sonja; Faber, Mirko; Altmann, Britta; Mas Marques, Andreas; Bock, C.-Thomas; Niendorf, Sandra

doi:10.1016/j.ijmm.2024.151600

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…In all groups, from April 2019 to November 2022, the frequency of GII.4[P16] remained lower than that of GII.4[P31] or GII.2[P16] ( Figure 2 ). This trend did not differ from that reported in Japan from July 2018 to June 2021 [ 31 ] but was different from that observed elsewhere, such as in Germany [ 48 ]. However, since December 2022, a higher number of GII.4[P16] cases/outbreaks have been detected in Groups A–C.…”

Section: Discussioncontrasting

confidence: 84%

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Epidemiological Features of Human Norovirus Genotypes before and after COVID-19 Countermeasures in Osaka, Japan

Shirai,

Phadungsombat,

Ushikai

et al. 2024

Viruses

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We investigated the molecular epidemiology of human norovirus (HuNoV) in all age groups using samples from April 2019 to March 2023, before and after the COVID-19 countermeasures were implemented. GII.2[P16] and GII.4[P31], the prevalent strains in Japan before COVID-19 countermeasures, remained prevalent during the COVID-19 pandemic, except from April to November 2020; in 2021, the prevalence of GII.2[P16] increased among children. Furthermore, there was an increase in the prevalence of GII.4[P16] after December 2022. Phylogenetic analysis of GII.P31 RdRp showed that some strains detected in 2022 belonged to a different cluster of other strains obtained during the present study period, suggesting that HuNoV strains will evolve differently even if they have the same type of RdRp. An analysis of the amino acid sequence of VP1 showed that some antigenic sites of GII.4[P16] were different from those of GII.4[P31]. The present study showed high infectivity of HuNoV despite the COVID-19 countermeasures and revealed changes in the prevalent genotypes and mutations of each genotype. In the future, we will investigate whether GII.4[P16] becomes more prevalent, providing new insights by comparing the new data with those analyzed in the present study.

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Section: Discussioncontrasting

confidence: 84%

“…The GII.2[P16] epidemic in children in 2021 was notable for two points. First, the resurgence of GII.2[P16] in Japan was noteworthy, despite the decline in other countries [ 33 , 48 ]. Second, the number of HuNoV detections in March 2021 was highest during the present study period in Groups A and B.…”

Section: Discussionmentioning

confidence: 99%

Epidemiological Features of Human Norovirus Genotypes before and after COVID-19 Countermeasures in Osaka, Japan

Shirai,

Phadungsombat,

Ushikai

et al. 2024

Viruses

View full text Add to dashboard Cite

show abstract

“…Since early 2020, COVID-19 has become a global pandemic and control measures have been taken worldwide, which may indirectly affect the transmissions of other viruses. According to norovirus surveillance in Germany, the incidence of norovirus infections was affected by the introduction and reduction of COVID-19 control measures, while the circulation of genotypes showed relatively less changes during the COVID-19 period ( Jacobsen et al, 2024 ). This study compared the outbreak profiles regarding genetic variations for the genotypes of GII.2[P16] and GII.17[P17] before and during the COVID-19 pandemic.…”

Section: Discussionmentioning

confidence: 99%