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A Systematic Review of Evidence That Enteroviruses May Be Zoonotic Jane K

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A Systematic Review of Evidence That Enteroviruses May Be Zoonotic Jane K Fieldhouse et al. Emerging Microbes & Infections (2018) 7:164 Emerging Microbes & Infections DOI 10.1038/s41426-018-0159-1 www.nature.com/emi REVIEW ARTICLE Open Access A systematic review of evidence that enteroviruses may be zoonotic Jane K. Fieldhouse 1,XinyeWang2, Kerry A. Mallinson1,RickW.Tsao1 and Gregory C. Gray 1,2,3 Abstract Enteroviruses infect millions of humans annually worldwide, primarily infants and children. With a high mutation rate and frequent recombination, enteroviruses are noted to evolve and change over time. Given the evidence that human enteroviruses are commonly found in other mammalian species and that some human and animal enteroviruses are genetically similar, it is possible that enzootic enteroviruses may also be infecting human populations. We conducted a systematic review of the English and Chinese literature published between 2007 and 2017 to examine evidence that enteroviruses may be zoonotic. Of the 2704 articles screened for inclusion, 16 articles were included in the final review. The review of these articles yielded considerable molecular evidence of zooanthroponosis transmission, particularly among non-human primates. While there were more limited instances of anthropozoonosis transmission, the available data support the biological plausibility of cross-species transmission and the need to conduct periodic surveillance at the human–animal interface. Introduction Enterovirus D68 (EV-D68) is a type that has caused 1234567890():,; 1234567890():,; 1234567890():,; 1234567890():,; Enteroviruses (EVs) are positive-sense, single-stranded sporadic but severe respiratory disease outbreaks across RNA viruses in the family Picornaviridae that infect the United States, Asia, Africa, and Europe in recent millions of people worldwide on an annual basis, espe- years3,4. cially infants and children under the age of one1. More In 2012, a comparative analysis of phylogenic and than 300 serotypes of EV have been identified and genetic classification demonstrated a close relationship demonstrated to cause a variety of diseases and morbid- between animal and human picornaviruses5. In February ity2. Among the most notable EVs known to infect 2013, the International Committee on Taxonomy of humans are coxsackie-, echo-, polio-, and rhinoviruses. Viruses (ICTV) approved changes to EV and rhinovirus While a majority of non-polio EV infections are asymp- species names to remove all reference to the host species tomatic or cause mild respiratory disease, more severe names. Former species names had been selected based disease outcomes such as aseptic meningitis, acute flaccid upon the host species from which the virus was originally paralysis (AFP), and acute hemorrhagic conjunctivitis are isolated; however, after many of the human EV species associated with certain EV types. Enterovirus 71 (EV-71), were identified and isolated in non-human hosts, the for example, is a type most commonly associated with proposal was made to drop the designation of the viruses severe hand, foot, and mouth (HFMD) disease. as human, bovine, porcine, and simian. Today, EVs are classified into 12 species, including enterovirus A–L (EV- A, B, C, D, E, F, G, H, J, K, and L) and rhinovirus A–C Correspondence: Jane K. Fieldhouse (jane.fi[email protected]) – fl 1 (RV-A, B, and C) (Table 1). EVs E G chie y cause disease Division of Infectious Disease and Global Health Institute, Duke University, 6 7 Durham, NC 27710, USA in livestock, such as cattle and pigs , while several simian 2Global Health Research Center, Duke Kunshan University, Kunshan 215316 EVs (e.g., EV-H and EV-J) have been isolated from Jiangsu, China both captive and wild non-human primates (NHPs)2,8. Full list of author information is available at the end of the article. These authors contributed equally: Jane K. Fieldhouse, Xinye Wang, Kerry A. Mallinson, Rick W. Tsao © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a linktotheCreativeCommons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. Fieldhouse et al. Emerging Microbes & Infections (2018) 7:164 Page 2 of 9 Table 1 Species within the Enterovirus genus Methods In August 2017, we searched the English literature Current species Former species Number of unique published between 2007 and 2017 on ProQuest, PubMed, name name viruses recognized Scopus, and Web of Science databases. The systematic Enterovirus A Human enterovirus A25 review of Chinese literature published between 2007 and 2017 was conducted in September 2017 on the Chinese Enterovirus B Human enterovirus B63 National Knowledge Infrastructure (CNKI), Wanfang Enterovirus C Human enterovirus C23 Data and Weipu Data databases. Both reviews followed Enterovirus D Human enterovirus D5 the standard systematic review procedures established by Enterovirus E Bovine enterovirus 4 the Preferred Reporting Items for Systematic Reviews and (group A) Meta-Analyses (PRISMA). In each of these databases, we empirically chose to search for citations during the last 10 Enterovirus F Bovine enterovirus 6 years as molecular methods for virus detections have (group B) markedly increased during the last decade as compared to Enterovirus G Porcine enterovirus B20 older diagnostic methods such as cell culture and Enterovirus H Simian enterovirus A1 immunoassays. The search was additionally limited to Enterovirus I – 1 include the following publication categories: review, arti- cle, dissertation, thesis, or journal. Articles were included fi Enterovirus J Unclassi ed simian 6 in the search if they mentioned “enterovirus”, “rhino- viruses virus”, a virus that belongs to the EV genus (“coxsackie”, Enterovirus K – 1 “echovirus”, “poliovirus”, “pleurodynia”, “simian virus 6”, Enterovirus L – 1 “SV6”, and “unclassified simian virus”), or a disease caused “ ” “ Rhinovirus A Human rhinovirus A80 by an EV ( Hand, foot, and mouth disease , Bornholm disease”, and “Swine vesicular disease”) as well as a term Rhinovirus B Human rhinovirus B32 of interest (“human infection”, “transmiss*”, “transfer”, Rhinovirus C Human rhinovirus C56 “cross-species”, “interspecies”, “zoono*”, “anthropono*”, “ ” Derived from: refs. 51,52 or zooanthropono* ) in either the title, abstract, or key- words. The search methods were designed to capture any documentation of zoonotic transmission, regardless of the Enterovirus I has historically been excluded for fear of terms used to describe the type of transmission. confusion with enterovirus 1; however, a dromedary The following search string was used for the English camel enterovirus was proposed as a new species of EV I databases: (enterovirus* OR rhinovirus* OR coxsackie* to the ICTV in June 20169. OR echovirus* OR poliovirus* OR “Hand, foot, and mouth Given the evidence that human EVs may be commonly disease” OR “Bornholm disease” OR pleurodynia OR found in other mammalian species, it is possible EVs that “Simian virus 6” OR SV6 OR “unclassified simian virus*” naturally circulate in animal populations may also be OR “Swine vesicular disease”) AND (“human infection” infecting human populations. With multiple genotypes, a OR transmiss* OR transfer OR cross-species OR inter- high mutation rate, and frequent recombination10, EVs species OR zoono* OR anthropono* OR zooanthropono*). have considerable potential for cross-species infection. Articles published in languages other than English were Recognizing that the term “zoonoses” can be confusing11, not considered during the English literature review. for the purposes of this review, we defined the generic Concurrently with the English literature review, we term “zoonoses” as a “two-way street” where a pathogen conducted a systematic review of the Chinese literature causing disease might move from either animals to due to the high annual disease burden of EVs in China. humans or from humans to animals12,13. Where we Between 2008 and 2013 alone, China experienced epi- sought to be directionally more specific, we employed the demic outbreaks and saw over 9 million reported cases of term “anthropozoonosis”, which we embraced as “a HFMD caused predominantly by EV serotypes A71 (EV- disease causing pathogen that is transmitted from animals A71) and Coxsackievirus A16 (CV-A16)14,15. From a One to humans”, and “zooanthroponosis”, sometimes referred Health perspective, China is also seeing increasingly fre- to as “reverse zoonoses”,as“a disease causing pathogen quent and intense contact between humans and domestic that is transmitted from humans to animals.” Therefore, livestock largely due to the rapid increase in demand for in this report, we sought to review the English and Chi- meat, poultry, and dairy products. Furthermore, habitat nese scientific literature for evidence that EVs may be loss and illegal wildlife trade have recently increased zoonotic. human exposure to wild animals16. Conceivably, Chinese Fieldhouse
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