Journal List > J Bacteriol Virol > v.46(3) > 1034215

Kee, Kim, Kim, Ha, Kim, Jeong, Chung, and Seo: The Genetic Diversity of Norovirus from Children with Diarrhea in Gwangju Metropolitan City, Korea: 2008–2012

Abstract

In order to study the characteristics of norovirus in Gwangju metropolitan city, We examined norovirus in 13,931 fecal specimens collected through five years (2008–2012) from children admitted with a chief complain of acute diarrhea. Among a total of norovirus (NoV) was most frequently detected (3,025 cases, 21.7%). Concerning the frequency of virus detected by month, NoV tended to break out frequently from October to March in the following year. NoV was detected most highly in 0~3 year infants. Through examinations on NoV genotypes, among 3,025 cases that turned out to be positive, the genotypes of 2,652 cases were determined with various results including 13 types of GI and 17 types of GII. The results of analysis on GI genotypes were as follows: GI-4 (21.9%), GI-2 (15.2%), and GI-6 (10.5%). GII genotypes were as follows: GII-4 (63.9%), GII-3 (18.9%), GII-8 (4.2%), GII-2 (3.9%), GII-6 (3.3%), and GII-1 (1.9%). Eight types of variants for GII-4 genotype (427 cases) were identified. The majority of the GII-4 variants was GII-4_Farmington (181 cases, 42.4%), which peaked in 2012, while GII-4_2008b (173 cases, 40.5%) showed a high prevalence in 2011. Concerning the circulation of variants, as many as eight types of GII-4 variants were identified in 2012, showing more varieties than in other years. Therefore, this study can be used as fundamental data for the development of vaccine candidate for the prevention of viral diarrheal diseases with high-incidence.

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Figure 1.
Seasonal distribution of norovirus infection from diarrheal patients in Gwangju metropolitan city during 5 years (2008~2012)
jbv-46-142f1.tif
Figure 2.
Relationship between monthly distribution of norovirus from diarrheal patients and mean monthly temperature in Gwangju metropolitan city during 5 years (2008~2012)
jbv-46-142f2.tif
Table 1.
RT-PCR primers for the detection of diarrheal patients in this study
Virus Primers Sequences (5′ → 3′) Target Size
Norovirus (first) GI-FIM ATGGCCATGTTCCGITGGATG    
GI-RIM CCAACCCARCCATTRTACATYTG    
GII-G1M CCCTCGAGGGCGATCGCAATCT VP1 -
GG-R1M CCRCCIGCATRICCRTTRTACAT    
Norovirus (semi-nested) GI-F1M CGGGCCCGAATTYGTAAATGATG   314
GI-R1M CCAACCCARCCATTRTACATYTG VP1 314
GII-F1M CACAATTGTGAATGAAGATGGCGTCGA VP1 313
GII-R1M CCRCCIGCATRICCRTTRTACAT   313
Table 2.
Prevalence of norovirus infection detected from diarrhe patients in Gwangju metropolitan city during 5 years (20082012)
Year No. of cases No. of detected Detection rate (%)
2008 2,971 626 21.1
2009 3,147 455 14.5
2010 2,844 785 27.6
2011 2,812 619 22.0
2012 2,157 540 25.0
Total 13,931 3,025 21.7
Table 3.
Proportion of norovirus genogroup GI and GII detected in Gwangju metropolitan city during 5 years (2008~2012)
Genogroup p Year Total
2008 2009 2010 2011 2012
GI 27 (4.3) 12 (2.6) 23 (2.9) 16 (2.6) 7 (1.3) 85 (2.8)
GII 593 (94.7) 438 (96.3) 750 (95.6) 591 (95.5) 530(98.1) 2,902(95.9)
GI & GII 6 (1.0) 5 (1.1) 12 (1.5) 12 (1.9) 3 (0.6) 38 (1.3)
Total 626 455 785 619 540 3,025
Table 4.
Annual genotypic distribution of norovirus GI in Gwangju metropolitan city during 5 years (2008~2012)
Year genotype No. of samples (%) Total
2008 2009 2010 2011 2012
GI-1 2 (6.3)   3 (11.1) 4 (16.7) 2 (25.0) 11 (10.5)
GI-2 3 (9.4) 1 (7.1) 8 (29.6) 3 (12.5) 1 (12.5) 16 (15.2)
GI-3 1 (3.1) 3 (21.4) 2 (7.4) 4 (16.7)   10 (9.5)
GI-4 15 (46.9) 3 (21.4)   2 (8.3) 3 (37.5) 23 (21.9)
GI-5 4 (12.5)   1 (3.7)     5 (4.8)
GI-6 3 (9.4)   6 (22.2) 2 (8.3)   11 (10.5)
GI-7   3 (21.4) 1 (3.7) 1 (4.2)   5 (4.8)
GI-8       1 (4.2)   1 (1.0)
GI-9 2 (6.3) 3 (21.4) 1 (3.7) 2 (8.3)   8 (7.6)
GI-10     1 (3.7)     1 (1.7)
GI-12     3 (11.1) 3 (12.5)   6 (5.7)
GI-13         1 (12.5) 1 (1.0)
GI-14 2 (6.3) 1 (7.1) 1 (3.7) 2 (8.3) 1 (12.5) 7 (6.7)
Total 32 14 27 24 8 105
Table 5.
Annual genotypic distribution of norovirus GII in Gwangju metropolitan city during 5 years (2008~2012)
Year genotype No. of samples (%) Total
2008 2009 2010 2011 2012
GII-1   5 (1.3) 23 (3.6) 3 (0.7) 17 (3.4) 48 (1.9)
GII-2 7 (1.2) 30 (8.0) 2 (0.3) 38 (8.4) 23 (4.6) 100 (3.9)
GII-3 101 (17.2) 21 (5.6) 140 (22.1) 93 (20.6) 127 (25.3) 482 (18.9)
GII-4 456 (77.6) 226 (60.4) 405 (64.0) 256 (56.8) 285 (56.9) 1,628 (63.9)
GII-5       5 (1.1) 4 (0.8) 9 (0.4)
GII-6 3 (0.5) 6 (1.6) 25 (3.9) 22 (4.9) 29 (5.8) 85 (3.3)
GII-7 1 1(1.9) 17 (4.5) 10 (1.6) 3 (0.7) 2 (0.4) 43 (1.7)
GII-8 3 (0.5) 61 (16.3) 19 (3.0) 21 (4.7) 2 (0.4) 106 (4.2)
GII-9       1 (0.2)   1 (0.0)
GII-10   1 (0.3)       1 (0.0)
GII-11 1 (0.2)       8 (1.6) 9 (0.4)
GII-12 2 (0.3) 4 (1.1) 5 (0.8) 2 (0.4) 2 (0.4) 15 (0.6)
GII-13 1 (0.2)   1 (0.2) 1 (0.2)   3 (0.1)
GII-15       1 (0.2)   1 (0.0)
GII-16 2 (0.3) 3 (0.8) 1 (0.2) 4 (0.9) 2 (0.4) 12 (0.5)
GII-17 1 (0.2)   2 (0.3)     3 (0.1)
GII-18       1 (0.2)   1 (0.0)
Total 588 374 633 451 501 2,547
Table 6.
Change in relative frequencies of GII-4 variants in Gwangju metropolitan city during 5 years (2008~2012)
Year No. of samples (%) Total
2008 2009 2010 2011 2012
GII-4 456 226 405 256 285 1,628
GII-4 variant (%)   10 (4.4) 5 (1.2) 128 (50.0) 284 (99.7) 427 (26.2)
GII-4_Bristol         4 (1.4) 4 (0.9)
GII-4_Farmington     1 (10) 3 (2.3) 177 (62.3) 181 (42.4)
GII-4_Hunter   1 (10)   1 (0.8) 1 (0.4) 3 (0.7)
GII-4_Sakai       1 (0.8) 1 (0.4) 2 (0.5)
GII-4_2006a       4 (3.1) 2 (0.7) 6 (1.4)
GII-4_2006b       4 (3.1) 50 (17.6) 54 (12.6)
GII-4_2008b   9 (90) 4 (90) 115 (89.8) 45 (15.8) 173 (40.5)
GII-4_Outlier         4 (1.4) 4 (0.9)
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