An official website of the United States government
Here's how you know
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
As a library, NLM provides access to scientific literature. Inclusion in an NLM database does not imply endorsement of, or agreement with,
the contents by NLM or the National Institutes of Health.
Learn more:
PMC Disclaimer
|
PMC Copyright Notice
Surveillance of rotavirus strains was first established in the United States in 1987, through the analysis of G and P types of isolates obtained in seven sentinel locations, mostly during multiple consecutive rotavirus seasons extending from 1987 to 1993 (4, 14). Subsequently, this initial surveillance was expanded to 37 centers participating in a system of national reporting on year-round rotavirus activity in order to assess geographic and temporal trends, but without monitoring strain types (8, 15).
The composition and distribution of rotavirus types may vary in distinct geographic and socioeconomic regions of the world, as demonstrated in a study that compared data obtained in the United States and in Brazil as models for the epidemiology of rotavirus in temperate, developed and tropical, developing countries, respectively (6). In this context, it was of interest to verify whether the recent data reported by Ramachandran et al. (12) were still in accordance with those obtained by Gouvea et al. (4) and Santos et al. (14) for the United States in the previous decade. Indeed, the major epidemiological characteristics were confirmed: an overwhelming prevalence of conventional strains (83% in the recent season versus 95% in previous seasons) with a predominance of P[8]G1 strains (66 versus 71%) and very low proportions of mixed infections (2.3 versus 3%) were found in the continental United States. Differences in the sensitivities of the assays employed in the two studies might have accounted for the small difference found in the efficiencies of typing rotavirus strains (94.5% in the recent study versus 100% in the old study). Nevertheless, contrary to Ramanchandran et al.’s statement, a few strains bearing the supposedly attenuated P[6] specificity had already been identified in association with infant diarrhea in the United States (14). Some of those isolates had been further sequenced and characterized, including the oldest known and cell culture-adapted American P[6] strain, SC2 (13).
Of interest in Ramachandran et al.’s study was the finding of a small percentage (7.2%) of strains of the G9 type in several Midwestern states. Remarkably, however, G9 strains were not detected in the more populated region of Philadelphia, where it had circulated a decade ago (1, 12). Following the first identification of rotavirus type G9 in the developed world (prototype strain WI61 in Philadelphia, Pa., and strain F45 in Japan), it was also recognized as a cause of infant diarrhea in the developing world (strain Mc323 in Chiang Mai, Thailand, and an unnamed strain in Belém, Brazil) (1, 10, 11, 16). Molecular analysis revealed very high genomic identity between strains WI61 and F45, suggesting that they might represent the same emerging virus that had been successfully introduced into the human population (5, 7). Most recently, genetically distinct G9 strains were identified as common human rotaviruses in India and frequent swine pathogens in Southern Brazil (2, 9), thus supporting the suggestion that G9 strains might have emerged in the human population from animal reservoirs by natural reassortment (3, 16).
REFERENCES
1.Clark H F, Hoshino Y, Bell L M, Groff J, Hess G, Bachman P, Offit P A. Rotavirus isolate WI61 representing a presumptive new human serotype. J Clin Microbiol. 1987;25:1757–1762. doi: 10.1128/jcm.25.9.1757-1762.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
2.Das B K, Gentsch J R, Cicirello H G, Woods P A, Gupta A, Ramachandran M, Kumar R, Bahn M K, Glass R I. Characterization of rotavirus strains from newborns in New Delhi, India. J Clin Microbiol. 1994;32:1820–1822. doi: 10.1128/jcm.32.7.1820-1822.1994. [DOI] [PMC free article] [PubMed] [Google Scholar]
3.Gouvea V, Brantly M. Is rotavirus a population of reassortants? Trends Microbiol. 1995;3:159–162. doi: 10.1016/s0966-842x(00)88908-8. [DOI] [PubMed] [Google Scholar]
4.Gouvea V, Ho M-S, Glass R, Woods P, Forrester B, Robinson C, Ashley R, Riepenhoff-Talty M, Clark H F, Taniguchi K, Meddix E, McKellar B, Pickering L. Serotypes and electropherotypes of human rotavirus in the USA: 1987–1989. J Infect Dis. 1990;162:362–367. doi: 10.1093/infdis/162.2.362. [DOI] [PubMed] [Google Scholar]
5.Gouvea V, Ramirez C, Li B, Santos N, Saif L, Clark H F, Hoshino Y. Restriction endonuclease analysis of the vp7 genes of human and animal rotaviruses. J Clin Microbiol. 1993;31:917–923. doi: 10.1128/jcm.31.4.917-923.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
6.Gouvea V, Santos N. Molecular epidemiology of rotavirus in Brazil: a model for the tropics? Virus Rev Res. 1997;2:15–24. [Google Scholar]
7.Green K Y, Hoshino Y, Ikegami N. Sequence analysis of the gene encoding the serotype-specific glycoprotein (VP7) of two new human rotavirus serotypes. Virology. 1989;168:429–433. doi: 10.1016/0042-6822(89)90289-4. [DOI] [PubMed] [Google Scholar]
8.LeBaron C W, Lew J, Glass R I, Weber J M, Ruiz-Palacios G M The Rotavirus Study Group. Annual rotavirus epidemic patterns in North America: results of a 5-year retrospective survey of 88 centers in Canada, Mexico, and the United States. JAMA. 1990;264:983–988. doi: 10.1001/jama.264.8.983. [DOI] [PubMed] [Google Scholar]
9.Lima R C C, Nosawa C M, Linhares R E C, Gouvea V, Santos N. Diversity of porcine rotavirus in Paraná. Virus Rev Res. 1998;3(Suppl. 1):59. . (Abstract.) [Google Scholar]
10.Linhares A C, Gabbay Y B, Mascarenhas J D P, de Freitas R B, Oliveira C S, Bellesi N, Monteiro T A F, Lins-Lainson Z, Ramos F L P, Valente S A. Immunogenicity, safety and efficiency of tetravalent rhesus-human, reassortant rotavirus vaccine in Belem, Brazil. Bull W H O. 1996;74:491–500. [PMC free article] [PubMed] [Google Scholar]
11.Nakagomi T, Oshima A, Akatami K, Ikagami N, Katsushima N, Nakagomi O. Isolation and characterization of a serotype 9 human rotavirus strain. Microbiol Immunol. 1990;34:77–82. doi: 10.1111/j.1348-0421.1990.tb00994.x. [DOI] [PubMed] [Google Scholar]
12.Ramachandran M, Gentsch J R, Parashar U D, Jin S, Woods P A, Bishop R F, Greenberg H B, Urasawa S, Gerne G, Coulson B S, Tanaguchi K, Bresee J S, Glass R I The National Rotavirus Strain Surveillance System Collaborating Laboratories. Detection and characterization of novel rotavirus strains in the United States. J Clin Microbiol. 1998;36:3223–3229. doi: 10.1128/jcm.36.11.3223-3229.1998. [DOI] [PMC free article] [PubMed] [Google Scholar]
13.Santos N, Gouvea V, Timenetsky M C, Clark H F, Riepenhoff-Talty M, Garbarg-Chenon A. Comparative analysis of VP8* sequences from rotaviruses possessing M37-like VP4 recovered from children with and without diarrhoea. J Gen Virol. 1994;75:1775–1780. doi: 10.1099/0022-1317-75-7-1775. [DOI] [PubMed] [Google Scholar]
14.Santos N, Ripenhoff-Talty M, Clark H F, Offit P, Gouvea V. VP4 genotyping of human rotavirus in the United States. J Clin Microbiol. 1994;32:205–208. doi: 10.1128/jcm.32.1.205-208.1994. [DOI] [PMC free article] [PubMed] [Google Scholar]
15.Torok T J, Kilgore P E, Clarke M J, Holman R C, Bresee J S, Glass R I. Visualizing geographic and temporal trends in rotavirus activity in the United States, 1991 to 1996. Pediatr Infect Dis J. 1997;16:941–946. doi: 10.1097/00006454-199710000-00007. [DOI] [PubMed] [Google Scholar]
16.Urasawa S, Hasegawa A, Urasawa T, Taniguchi K, Wakasugi F, Susuki H, Inouye S, Pongprot B, Supawadee J, Suprasert S, Rangsiyanond J, Tonusin S, Yamazi Y. Antigenic and genetic analyses of human rotavirus in Chiang Mai, Thailand: evidence for a close relationship between human and animal rotaviruses. J Infect Dis. 1992;166:227–234. doi: 10.1093/infdis/166.2.227. [DOI] [PubMed] [Google Scholar]
Our study on rotavirus strain surveillance was designed to obtain data on rotavirus strains currently circulating in the United States, in anticipation of assessing the impact of a national rotavirus vaccination program on strain diversity. One of our main conclusions was that a strain believed to be uncommon globally, serotype G9, was present in multiple U.S. cities and was one of two predominant strains in one city, Indianapolis, in 1996. One hypothesis to explain these results was that in the United States, these strains had been previously underdetected because of inadequate strain surveillance or lack of routine detection methods for G9 strains. Alternatively, since these strains have been detected in humans from a number of countries, including Japan (1-6, 1-10, 1-11), India (1-12), Bangladesh (1-15), Malawi (1-3), and Thailand (1-16), and only once before in the United States (1-2), the new finding that this strain was prevalent in multiple U.S. cities could represent either the introduction of a new strain or the emergence of that earlier isolate. The data presented by Ramachandran et al. (1-13) were consistent with the emergence of a distinct strain closely related to subgroup I human rotavirus strains with short electropherotypes, and consequently, we did not discuss a potential animal origin for these strains, a possibility that was raised in a study of G9 strains from Thailand (1-16). A more recent study on the antigenic and genetic properties of several of these strains supports the hypothesis that the recent U.S. P[6],G9 isolates are closest genetically to human rotaviruses of the DS-1 genogroup (1-8). Although we did not exhaustively cite all the studies documenting the global importance of serotypes G1 to G4, we did cite representative papers from the United States (1-9, 1-18), Japan (1-17), and Italy (1-5).
A second conclusion of our study was that strains bearing the P[6] genotype had been detected relatively frequently in multiple U.S. cities for the first time. Previously, this genotype had been detected frequently among infants with diarrhea only in developing countries, for which we cited references from Timenetsky and coworkers from a study in Brazil and from Ramachandran and coworkers in studies from India (1-12, 1-14).
Regarding the failure to detect G9 strains in Philadelphia, where the first U.S. isolates were identified (1-2), we are currently involved in targeted studies in Philadelphia examining strains from both an earlier period (1995 to 1996) and a later period (1997 to 1998). G9 strains have been detected during both periods (1-1, 1-7), and many of the strains appear to be related to the predominant strain from 1996 to 1997 (1-13). We anticipate that both of these studies will be submitted for publication in 1999.
REFERENCES
1-1.Clark, H. F. 1999. Personal communication.
1-2.Clark H F, Hoshino Y, Bell L M, Groff J, Hess G, Bachman P, Offit P A. Rotavirus isolate W161 representing a presumptive new human serotype. J Clin Microbiol. 1987;25:1757–1762. doi: 10.1128/jcm.25.9.1757-1762.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
1-3.Cunliffe N A, Gondwe J S, Graham S M, Broadhead R L, Molyneux M E, Woods P A, Bresee R I, Gentsch J R, Hart C A. Rotavirus G and P types in children with acute diarrhea in Blantyre, Malawi, from 1997 to 1998: predominance of novel P[6]G8 strains. J Med Virol. 1999;57:308–312. [PubMed] [Google Scholar]
1-4.Gentsch J R, Woods P A, Ramachandran M, Das B K, Leite J P, Alfieri A, Kumar R, Bhan M K, Glass R I. Review of G and P typing results from a global collection of strains: implications for vaccine development. J Infect Dis. 1996;174(Suppl. 1):S30–S36. doi: 10.1093/infdis/174.supplement_1.s30. [DOI] [PubMed] [Google Scholar]
1-5.Gerna G, Sarasini A, Arista S, Di Mateo A, Giovanelli L, Parea M, Halonen P. Prevalence of human rotavirus serotypes in some European countries 1981–1988. Scand J Infect Dis. 1990;22:5–10. doi: 10.3109/00365549009023112. [DOI] [PubMed] [Google Scholar]
1-6.Green K Y, Hoshino Y, Ikegami N. Sequence analysis of the gene encoding the serotype-specific glycoprotein (VP7) of two new human rotavirus serotypes. Virology. 1989;168:429–433. doi: 10.1016/0042-6822(89)90289-4. [DOI] [PubMed] [Google Scholar]
1-7.Griffin, D. D., C. Kirkwood, U. D. Parashar, J. S. Bresee, R. I. Glass, and J. R. Gentsch. Unpublished data.
1-8.Kirkwood C D, Gentsch J R, Hoshino Y, Clark H F, Glass R I. Genetic and antigenic characterization of a serotype P[6], G9 human rotavirus strain isolated in the U.S. Virology. 1999;256:45–53. doi: 10.1006/viro.1998.9591. [DOI] [PubMed] [Google Scholar]
1-9.Matson D O, Estes M K, Burns J W, Greenberg H B, Taniguchi K, Urasawa S. Serotype variation of human group A rotaviruses in two regions of the USA. J Infect Dis. 1990;162:605–614. doi: 10.1093/infdis/162.3.605. [DOI] [PubMed] [Google Scholar]
1-10.Nakagomi O, Nakagomi T, Akatani K, Ikegami N, Katsushima N. Relative frequency of rotavirus serotypes in Yamagata, Japan, over four consecutive rotavirus seasons. Res Virol. 1990;141:459–463. doi: 10.1016/0923-2516(90)90047-m. [DOI] [PubMed] [Google Scholar]
1-11.Nakagomi T, Ohshima A, Akatani K, Ikegami N, Katsushima N, Nakagomi O. Isolation and molecular characterization of a serotype 9 human rotavirus strain. Microbiol Immunol. 1990;34:77–82. doi: 10.1111/j.1348-0421.1990.tb00994.x. [DOI] [PubMed] [Google Scholar]
1-12.Ramachandran M, Das B K, Vij A, Kumar R, Bhambal S S, Kesari N, Rawat H, Bahl L, Thakur S, Woods P A, Glass R I, Bhan M K, Gentsch J R. Unusual diversity of human rotavirus G and P genotypes in India. J Clin Microbiol. 1996;34:436–439. doi: 10.1128/jcm.34.2.436-439.1996. [DOI] [PMC free article] [PubMed] [Google Scholar]
1-13.Ramachandran M, Gentsch J R, Parashar U D, Jin S, Woods P A, Holmes J L, Kirkwood C D, Bishop R F, Greenberg H B, Urasawa S, Gerna G, Coulson B S, Taniguchi K, Bresee J S, Glass R I The National Rotavirus Strain Surveillance System Collaborating Laboratories. Detection and characterization of novel rotavirus strains in the United States. J Clin Microbiol. 1998;36:3223–3229. doi: 10.1128/jcm.36.11.3223-3229.1998. [DOI] [PMC free article] [PubMed] [Google Scholar]
1-14.Timenetsky M C, Santos N, Gouvea V. Survey of rotavirus G and P types associated with human gastroenteritis in Sao Paulo, Brazil, from 1986 to 1992. J Clin Microbiol. 1994;32:2622–2624. doi: 10.1128/jcm.32.10.2622-2624.1994. [DOI] [PMC free article] [PubMed] [Google Scholar]
1-15.Unicomb L E, Podder G, Gentsch J R, Woods P, Hasan K Z, Faruque A S G, Albert M J, Glass R I. Evidence of high-frequency genomic reassortment of group A rotavirus strains in Bangladesh: emergence of type G9 in 1995. J Clin Microbiol. 1999;37:1885–1891. doi: 10.1128/jcm.37.6.1885-1891.1999. [DOI] [PMC free article] [PubMed] [Google Scholar]
1-16.Urasawa S, Hasegawa A, Urasawa T, Taniguchi K, Wakasugi F, Suzuki H, Inouye S, Pongprot B, Supawadee J, Suprasert S, Rangsiyanond P, Tonusin S, Yamazi Y. Antigenic and genetic analyses of human rotaviruses in Chiang Mai, Thailand: evidence for a close relationship between human and animal rotaviruses. J Infect Dis. 1992;166:227–234. doi: 10.1093/infdis/166.2.227. [DOI] [PubMed] [Google Scholar]
1-17.Urasawa S, Urasawa T, Taniguchi K, Wakasugi F, Kobayashi N, Chiba S, Sakurada N, Morita M, Morita O, Tokieda M, Kawamoto H, Minekawa Y, Obseto M. Survey of human rotavirus serotypes in different locales in Japan by enzyme-linked immunosorbent assay with monoclonal antibodies. J Infect Dis. 1989;160:44–51. doi: 10.1093/infdis/160.1.44. [DOI] [PubMed] [Google Scholar]
1-18.Woods P A, Gentsch J, Gouvea V, Mata L, Simhon A, Santosham M, Bai Z-S, Urasawa S, Glass R I. Distribution of serotypes of human rotavirus in different populations. J Clin Microbiol. 1992;30:781–785. doi: 10.1128/jcm.30.4.781-785.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]