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Perinet LC, Mutebi JP, Powers AM, Lutwama JJ, Mossel EC. Yata Virus (Family Rhabdoviridae, Genus Ephemerovirus) Isolation from Mosquitoes from Uganda, the First Reported Isolation since 1969. Diseases 2023; 11:diseases11010021. [PMID: 36810535 PMCID: PMC9944095 DOI: 10.3390/diseases11010021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/16/2023] [Accepted: 01/19/2023] [Indexed: 01/31/2023] Open
Abstract
As a part of a systematic study of mosquitoes and associated viruses in Uganda, a virus was isolated from a pool of Mansonia uniformis collected in July 2017, in the Kitgum District of northern Uganda. Sequence analysis determined that the virus is Yata virus (YATAV; Ephemerovirus yata; family Rhabdoviridae). The only previous reported isolation of YATAV was in 1969 in Birao, Central African Republic, also from Ma. uniformis mosquitoes. The current sequence is over 99% identical at the nucleotide level to the original isolate, indicating a high level of YATAV genomic stability.
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Affiliation(s)
- Lara C. Perinet
- Division of Vector-Borne Diseases, US Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
| | - John-Paul Mutebi
- Division of Vector-Borne Diseases, US Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
| | - Ann M. Powers
- Division of Vector-Borne Diseases, US Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
| | - Julius J. Lutwama
- Department of Arbovirology, Emerging, and Re-emerging Diseases, Uganda Virus Research Institute, Entebbe, Uganda
| | - Eric C. Mossel
- Division of Vector-Borne Diseases, US Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
- Correspondence:
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Kayiwa JT, Mayanja MN, Nakayiki TM, Senfuka F, Mugga J, Koehler JW, Mossel EC, Lutwama JJ. Phylogenetic Analysis of Wesselsbron Virus Isolated from Field-Captured Mosquitoes during a Rift Valley Fever Outbreak in Kabale District, Uganda-2016. Am J Trop Med Hyg 2023; 108:161-164. [PMID: 36410326 PMCID: PMC9833084 DOI: 10.4269/ajtmh.22-0481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 09/06/2022] [Indexed: 11/23/2022] Open
Abstract
After confirmation of two human cases of Rift Valley fever (RVF) in March 2016 in the Kabale district of Uganda, an entomological investigation was conducted with a focus on mosquito species composition and abundance of known and potential mosquito vector species, and virus testing to identify species most likely involved in Rift Valley fever virus transmission. This information could be used to forecast risk and facilitate improvement of prevention and response tools for use in preventing or controlling future outbreaks. From these collections, two virus isolates were obtained, one each from a pool of Aedes tricholabis and Ae. gibbinsi. Next-generation sequencing identified both isolates as Wesselsbron virus, family Flaviviridae, a neglected arbovirus of economic importance. These are the first reported Wesselsbron virus isolates from Uganda since 1966.
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Affiliation(s)
- John T. Kayiwa
- Department of Arbovirology, Emerging, and Re-emerging Diseases, Uganda Virus Research Institute, Entebbe, Uganda;,Address correspondence to John T. Kayiwa, Department of Arbovirology, Emerging, and Re-emerging Diseases, Uganda Virus Research Institute, P.O. Box 49, Plot 51-59 Nakiwogo Road, Entebbe, Uganda. E-mail:
| | - Martin N. Mayanja
- Department of Arbovirology, Emerging, and Re-emerging Diseases, Uganda Virus Research Institute, Entebbe, Uganda
| | - Teddy Muwawu Nakayiki
- Department of Arbovirology, Emerging, and Re-emerging Diseases, Uganda Virus Research Institute, Entebbe, Uganda
| | - Fred Senfuka
- Department of Arbovirology, Emerging, and Re-emerging Diseases, Uganda Virus Research Institute, Entebbe, Uganda
| | - Julius Mugga
- Department of Arbovirology, Emerging, and Re-emerging Diseases, Uganda Virus Research Institute, Entebbe, Uganda
| | - Jeffrey W. Koehler
- U.S. Army Medical Research Institute of Infectious Diseases, Frederick, Maryland
| | - Eric C. Mossel
- Division of Vector-Borne Diseases, U.S. Centers for Disease Control and Prevention, Fort Collins, Colorado
| | - Julius J. Lutwama
- Department of Arbovirology, Emerging, and Re-emerging Diseases, Uganda Virus Research Institute, Entebbe, Uganda
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Kading RC, Borland EM, Mossel EC, Nakayiki T, Nalikka B, Ledermann JP, Crabtree MB, Panella NA, Nyakarahuka L, Gilbert AT, Kerbis-Peterhans JC, Towner JS, Amman BR, Sealy TK, Miller BR, Lutwama JJ, Kityo RM, Powers AM. Exposure of Egyptian Rousette Bats ( Rousettus aegyptiacus) and a Little Free-Tailed Bat ( Chaerephon pumilus) to Alphaviruses in Uganda. Diseases 2022; 10:diseases10040121. [PMID: 36547207 PMCID: PMC9777265 DOI: 10.3390/diseases10040121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 11/18/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
The reservoir for zoonotic o'nyong-nyong virus (ONNV) has remained unknown since this virus was first recognized in Uganda in 1959. Building on existing evidence for mosquito blood-feeding on various frugivorous bat species in Uganda, and seroprevalence for arboviruses among bats in Uganda, we sought to assess if serum samples collected from bats in Uganda demonstrated evidence of exposure to ONNV or the closely related zoonotic chikungunya virus (CHIKV). In total, 652 serum samples collected from six bat species were tested by plaque reduction neutralization test (PRNT) for neutralizing antibodies against ONNV and CHIKV. Forty out of 303 (13.2%) Egyptian rousettes from Maramagambo Forest and 1/13 (8%) little free-tailed bats from Banga Nakiwogo, Entebbe contained neutralizing antibodies against ONNV. In addition, 2/303 (0.7%) of these Egyptian rousettes contained neutralizing antibodies to CHIKV, and 8/303 (2.6%) contained neutralizing antibodies that were nonspecifically reactive to alphaviruses. These data support the interepidemic circulation of ONNV and CHIKV in Uganda, although Egyptian rousette bats are unlikely to serve as reservoirs for these viruses given the inconsistent occurrence of antibody-positive bats.
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Affiliation(s)
- Rebekah C. Kading
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA
- Arbovirus Diseases Branch, Division of Vector-Borne Diseases, U.S. Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
- Correspondence: ; Tel.: +1-970-491-7833
| | - Erin M. Borland
- Arbovirus Diseases Branch, Division of Vector-Borne Diseases, U.S. Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
| | - Eric C. Mossel
- Arbovirus Diseases Branch, Division of Vector-Borne Diseases, U.S. Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
| | - Teddy Nakayiki
- Department of Arbovirology, Emerging, and Re-Emerging Infections, Uganda Virus Research Institute, Entebbe, Uganda
| | - Betty Nalikka
- Department of Zoology, Entomology, and Fisheries Science, Makerere University, Kampala, Uganda
| | - Jeremy P. Ledermann
- Arbovirus Diseases Branch, Division of Vector-Borne Diseases, U.S. Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
| | - Mary B. Crabtree
- Arbovirus Diseases Branch, Division of Vector-Borne Diseases, U.S. Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
| | - Nicholas A. Panella
- Arbovirus Diseases Branch, Division of Vector-Borne Diseases, U.S. Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
| | - Luke Nyakarahuka
- Department of Arbovirology, Emerging, and Re-Emerging Infections, Uganda Virus Research Institute, Entebbe, Uganda
| | - Amy T. Gilbert
- Animal Plant Health Inspection Service, National Wildlife Research Center, United States Department of Agriculture, Fort Collins, CO 80521, USA
- Poxvirus and Rabies Branch, Division of High-Consequence Pathogens, United States Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - Julian C. Kerbis-Peterhans
- Negaunee Integrative Research Center, Field Museum of Natural History, College of Arts & Sciences, Roosevelt University, Chicago, IL 60605, USA
| | - Jonathan S. Towner
- Viral Special Pathogens Branch, Division of High-Consequence Pathogens, United States Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - Brian R. Amman
- Viral Special Pathogens Branch, Division of High-Consequence Pathogens, United States Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - Tara K. Sealy
- Viral Special Pathogens Branch, Division of High-Consequence Pathogens, United States Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - Barry R. Miller
- Arbovirus Diseases Branch, Division of Vector-Borne Diseases, U.S. Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
| | - Julius J. Lutwama
- Department of Arbovirology, Emerging, and Re-Emerging Infections, Uganda Virus Research Institute, Entebbe, Uganda
| | - Robert M. Kityo
- Department of Zoology, Entomology, and Fisheries Science, Makerere University, Kampala, Uganda
| | - Ann M. Powers
- Arbovirus Diseases Branch, Division of Vector-Borne Diseases, U.S. Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
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Basile AJ, Niedrig M, Lambert AJ, Meurant R, Brault AC, Domingo C, Goodman CH, Johnson BW, Mossel EC, Mulders MN, Velez JO, Hughes HR. Laboratory evaluation of RealStar Yellow Fever Virus RT-PCR kit 1.0 for potential use in the global yellow fever laboratory network. PLoS Negl Trop Dis 2022; 16:e0010770. [PMID: 36067233 PMCID: PMC9481164 DOI: 10.1371/journal.pntd.0010770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 09/16/2022] [Accepted: 08/26/2022] [Indexed: 11/19/2022] Open
Abstract
Background
Early detection of human yellow fever (YF) infection in YF-endemic regions is critical to timely outbreak mitigation. African National Laboratories chiefly rely on serological assays that require confirmation at Regional Reference Laboratories, thus delaying results, which themselves are not always definitive often due to antibody cross-reactivity. A positive molecular test result is confirmatory for YF; therefore, a standardized YF molecular assay would facilitate immediate confirmation at National Laboratories. The WHO-coordinated global Eliminate Yellow Fever Epidemics Laboratory Technical Working Group sought to independently evaluate the quality and performance of commercial YF molecular assays relevant to use in countries with endemic YF, in the absence of stringent premarket assessments. This report details a limited laboratory WHO-coordinated evaluation of the altona Diagnostics RealStar Yellow Fever Virus RT-PCR kit 1.0.
Methodology and principal findings
Specific objectives were to assess the assay’s ability to detect YF virus strains in human serum from YF-endemic regions, determine the potential for interference and cross-reactions, verify the performance claims as stated by the manufacturer, and assess usability. RNA extracted from normal human serum spiked with YF virus showed the assay to be precise with minimal lot-to-lot variation. The 95% limit of detection calculated was approximately 1,245 RNA copies/ml [95% confidence interval 497 to 1,640 copies/ml]. Positive results were obtained with spatially and temporally diverse YF strains. The assay was specific for YF virus, was not subject to endogenous or exogenous interferents, and was clinically sensitive and specific. A review of operational characteristics revealed that a positivity cutoff was not defined in the instructions for use, but otherwise the assay was user-friendly.
Conclusions and significance
The RealStar Yellow Fever Virus RT-PCR kit 1.0 has performance characteristics consistent with the manufacturer’s claims and is suitable for use in YF-endemic regions. Its use is expected to decrease YF outbreak detection times and be instrumental in saving lives.
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Affiliation(s)
- Alison J. Basile
- Arboviral Diseases Branch, Division of Vector-Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
- * E-mail: (AJB); (HRH)
| | | | - Amy J. Lambert
- Arboviral Diseases Branch, Division of Vector-Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | | | - Aaron C. Brault
- Arboviral Diseases Branch, Division of Vector-Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Cristina Domingo
- Public Health Laboratory Support Unit, Centre for International Health Protection, Robert Koch Institute, Berlin, Germany
| | - Christin H. Goodman
- Arboviral Diseases Branch, Division of Vector-Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Barbara W. Johnson
- Scientific Laboratory Consulting, Laporte, Colorado, United States of America
| | - Eric C. Mossel
- Arboviral Diseases Branch, Division of Vector-Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | | | - Jason O. Velez
- Arboviral Diseases Branch, Division of Vector-Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Holly R. Hughes
- Arboviral Diseases Branch, Division of Vector-Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
- * E-mail: (AJB); (HRH)
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Fagre AC, Lewis J, Miller MR, Mossel EC, Lutwama JJ, Nyakarahuka L, Nakayiki T, Kityo R, Nalikka B, Towner JS, Amman BR, Sealy TK, Foy B, Schountz T, Anderson J, Kading RC. Subgenomic flavivirus RNA (sfRNA) associated with Asian lineage Zika virus identified in three species of Ugandan bats (family Pteropodidae). Sci Rep 2021; 11:8370. [PMID: 33863991 PMCID: PMC8052318 DOI: 10.1038/s41598-021-87816-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 04/05/2021] [Indexed: 11/09/2022] Open
Abstract
Serological cross-reactivity among flaviviruses makes determining the prior arbovirus exposure of animals challenging in areas where multiple flavivirus strains are circulating. We hypothesized that prior infection with ZIKV could be confirmed through the presence of subgenomic flavivirus RNA (sfRNA) of the 3' untranslated region (UTR), which persists in tissues due to XRN-1 stalling during RNA decay. We amplified ZIKV sfRNA but not NS5 from three experimentally-infected Jamaican fruit bats, supporting the hypothesis of sfRNA tissue persistence. Applying this approach to 198 field samples from Uganda, we confirmed presence of ZIKV sfRNA, but not NS5, in four bats representing three species: Eidolon helvum (n = 2), Epomophorus labiatus (n = 1), and Rousettus aegyptiacus (n = 1). Amplified sequence was most closely related to Asian lineage ZIKV. Our results support the use of sfRNA as a means of identifying previous flavivirus infection and describe the first detection of ZIKV RNA in East African bats.
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Affiliation(s)
- Anna C Fagre
- Colorado State University, Fort Collins, CO, USA
| | | | | | - Eric C Mossel
- Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | | | | | | | | | | | | | - Brian R Amman
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Tara K Sealy
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Brian Foy
- Colorado State University, Fort Collins, CO, USA
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Kuchinsky SC, Hawks SA, Mossel EC, Coutermarsh-Ott S, Duggal NK. Differential pathogenesis of Usutu virus isolates in mice. PLoS Negl Trop Dis 2020; 14:e0008765. [PMID: 33044987 PMCID: PMC7580916 DOI: 10.1371/journal.pntd.0008765] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 10/22/2020] [Accepted: 09/01/2020] [Indexed: 11/19/2022] Open
Abstract
Usutu virus (USUV; Flavivirus), a close phylogenetic and ecological relative of West Nile virus, is a zoonotic virus that can cause neuroinvasive disease in humans. USUV is maintained in an enzootic cycle between Culex mosquitoes and birds. Since the first isolation in 1959 in South Africa, USUV has spread throughout Africa and Europe. Reported human cases have increased over the last few decades, primarily in Europe, with symptoms ranging from mild febrile illness to severe neurological effects. In this study, we investigated whether USUV has become more pathogenic during emergence in Europe. Interferon α/β receptor knockout (Ifnar1-/-) mice were inoculated with recent USUV isolates from Africa and Europe, as well as the historic 1959 South African strain. The three tested African strains and one European strain from Spain caused 100% mortality in inoculated mice, with similar survival times and histopathology in tissues. Unexpectedly, a European strain from the Netherlands caused only 12% mortality and significantly less histopathology in tissues from mice compared to mice inoculated with the other strains. Viremia was highest in mice inoculated with the recent African strains and lowest in mice inoculated with the Netherlands strain. Based on phylogenetics, the USUV isolates from Spain and the Netherlands were derived from separate introductions into Europe, suggesting that disease outcomes may differ for USUV strains circulating in Europe. These results also suggest that while more human USUV disease cases have been reported in Europe recently, circulating African USUV strains are still a potential major health concern.
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Affiliation(s)
- Sarah C. Kuchinsky
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States of America
| | - Seth A. Hawks
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States of America
| | - Eric C. Mossel
- Division of Vector-borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, United States of America
| | - Sheryl Coutermarsh-Ott
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States of America
- * E-mail: (SCO); (NKD)
| | - Nisha K. Duggal
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States of America
- * E-mail: (SCO); (NKD)
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Kayiwa JT, Nankya AM, Ataliba I, Nassuna CA, Omara IE, Koehler JW, Dye JM, Mossel EC, Lutwama JJ. Dengue fever and chikungunya virus infections: identification in travelers in Uganda - 2017. Trop Dis Travel Med Vaccines 2019; 5:21. [PMID: 31798935 PMCID: PMC6884810 DOI: 10.1186/s40794-019-0099-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 11/21/2019] [Indexed: 02/07/2023]
Abstract
Arboviruses are (re-) emerging viruses that cause significant morbidity globally. Clinical manifestations usually consist of a non-specific febrile illness that may be accompanied by rash, arthralgia and arthritis and/or with neurological or hemorrhagic syndromes. The broad range of differential diagnoses of other infectious and non-infectious etiologies presents a challenge for clinicians. While knowledge of the geographic distribution of pathogens and the current epidemiological situation, incubation periods, exposure risk factors and vaccination history can help guide the diagnostic approach, the non-specific and variable clinical presentation can delay final diagnosis. This case report summarizes the laboratory-based findings of three travel-related cases of arbovirus infections in Uganda. These include a patient from Bangladesh with chikungunya virus infection and two cases of dengue fever from Ethiopia. Early detection of travel-imported cases by public health laboratories is important to reduce the risk of localized outbreaks of arboviruses such as dengue virus and chikungunya virus. Because of the global public health importance and the continued risk of (re-) emerging arbovirus infections, specific recommendations following diagnosis by clinicians should include obtaining travel histories from persons with arbovirus-compatible illness and include differential diagnoses when appropriate.
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Affiliation(s)
- John T Kayiwa
- 1Department of Arbovirology, Emerging and Re-emerging Infectious Diseases, Uganda Virus Research Institute, Entebbe, Uganda
| | - Annet M Nankya
- 1Department of Arbovirology, Emerging and Re-emerging Infectious Diseases, Uganda Virus Research Institute, Entebbe, Uganda
| | - Irene Ataliba
- 1Department of Arbovirology, Emerging and Re-emerging Infectious Diseases, Uganda Virus Research Institute, Entebbe, Uganda
| | - Charity A Nassuna
- 1Department of Arbovirology, Emerging and Re-emerging Infectious Diseases, Uganda Virus Research Institute, Entebbe, Uganda
| | - Isaac E Omara
- 1Department of Arbovirology, Emerging and Re-emerging Infectious Diseases, Uganda Virus Research Institute, Entebbe, Uganda
| | - Jeffrey W Koehler
- 2US Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD USA
| | - John M Dye
- 2US Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD USA
| | - Eric C Mossel
- 3Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO USA
| | - Julius J Lutwama
- 1Department of Arbovirology, Emerging and Re-emerging Infectious Diseases, Uganda Virus Research Institute, Entebbe, Uganda
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Lamorde M, Mpimbaza A, Walwema R, Kamya M, Kapisi J, Kajumbula H, Sserwanga A, Namuganga JF, Kusemererwa A, Tasimwa H, Makumbi I, Kayiwa J, Lutwama J, Behumbiize P, Tagoola A, Nanteza JF, Aniku G, Workneh M, Manabe Y, Borchert JN, Brown V, Appiah GD, Mintz ED, Homsy J, Odongo GS, Ransom RL, Freeman MM, Stoddard RA, Galloway R, Mikoleit M, Kato C, Rosenberg R, Mossel EC, Mead PS, Kugeler KJ. A Cross-Cutting Approach to Surveillance and Laboratory Capacity as a Platform to Improve Health Security in Uganda. Health Secur 2019; 16:S76-S86. [PMID: 30480504 DOI: 10.1089/hs.2018.0051] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Global health security depends on effective surveillance for infectious diseases. In Uganda, resources are inadequate to support collection and reporting of data necessary for an effective and responsive surveillance system. We used a cross-cutting approach to improve surveillance and laboratory capacity in Uganda by leveraging an existing pediatric inpatient malaria sentinel surveillance system to collect data on expanded causes of illness, facilitate development of real-time surveillance, and provide data on antimicrobial resistance. Capacity for blood culture collection was established, along with options for serologic testing for select zoonotic conditions, including arboviral infection, brucellosis, and leptospirosis. Detailed demographic, clinical, and laboratory data for all admissions were captured through a web-based system accessible at participating hospitals, laboratories, and the Uganda Public Health Emergency Operations Center. Between July 2016 and December 2017, the expanded system was activated in pediatric wards of 6 regional government hospitals. During that time, patient data were collected from 30,500 pediatric admissions, half of whom were febrile but lacked evidence of malaria. More than 5,000 blood cultures were performed; 4% yielded bacterial pathogens, and another 4% yielded likely contaminants. Several WHO antimicrobial resistance priority pathogens were identified, some with multidrug-resistant phenotypes, including Acinetobacter spp., Citrobacter spp., Escherichia coli, Staphylococcus aureus, and typhoidal and nontyphoidal Salmonella spp. Leptospirosis and arboviral infections (alphaviruses and flaviviruses) were documented. The lessons learned and early results from the development of this multisectoral surveillance system provide the knowledge, infrastructure, and workforce capacity to serve as a foundation to enhance the capacity to detect, report, and rapidly respond to wide-ranging public health concerns in Uganda.
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Affiliation(s)
- Mohammed Lamorde
- Mohammed Lamorde, PhD, FRCP, is Head of the Department of Prevention, Care and Treatment, Infectious Diseases Institute, Kampala, Uganda. Co-senior author
| | - Arthur Mpimbaza
- Arthur Mpimbaza, MBChB, MMed, MSc, is Project Coordinator, Infectious Diseases Research Collaboration, Kampala, and Lecturer, Child Health and Development Centre, College of Health Sciences, Makerere University, Kampala. Co-senior author
| | - Richard Walwema
- Richard Walwema, MBA, is with the Infectious Diseases Institute, Kampala
| | - Moses Kamya
- Moses Kamya, MBChB, MMed, MPH, PhD, is Professor and Chair, Makerere University School of Medicine, Kampala. Dr. Kamya is also with the Infectious Diseases Research Collaboration, Kampala
| | - James Kapisi
- James Kapisi, MBChB, MMed, MSc Epid, Infectious Diseases Research Collaboration, Kampala
| | - Henry Kajumbula
- Henry Kajumbula, MBChB, MMed, Department of Medical Microbiology, Makerere University School of Medicine, Kampala
| | - Asadu Sserwanga
- Asadu Sserwanga, MBChB, MPH, Infectious Diseases Research Collaboration, Kampala
| | | | - Abel Kusemererwa
- Abel Kusemererwa, Infectious Diseases Research Collaboration, Kampala
| | - Hannington Tasimwa
- Hannington Tasimwa, Department of Medical Microbiology, Makerere University School of Medicine, Kampala
| | - Issa Makumbi
- Issa Makumbi, MBChB, is with the Uganda Ministry of Health Public Health Emergency Operations Centre, Kampala
| | - John Kayiwa
- John Kayiwa, Uganda Virus Research Institute, Entebbe, Wakiso, Uganda
| | - Julius Lutwama
- Julius Lutwama, PhD, Uganda Virus Research Institute, Entebbe, Wakiso, Uganda
| | - Prosper Behumbiize
- Prosper Behumbiize is with the Health Information Systems Program, Kampala
| | - Abner Tagoola
- Abner Tagoola, MBChB, MMed, MSc, is with the Jinja Regional Referral Hospital Republic of Uganda Ministry of Health, Jinja, Uganda
| | - Jane Frances Nanteza
- Jane Frances Nanteza, MBChB, MMed, is with the Mubende Regional Referral Hospital, Republic of Uganda Ministry of Health, Mubende, Uganda
| | - Gilbert Aniku
- Gilbert Aniku, MBChB, MMed, is with Arua Regional Referral Hospital, Republic of Uganda Ministry of Health, Arua, Uganda
| | - Meklit Workneh
- Meklit Workneh, MD, MPH, is a Medical Microbiology Fellow, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Yukari Manabe
- Yukari Manabe, MD, is Associate Director of Global Health Research and Innovation, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Jeff N Borchert
- Jeff N. Borchert, MS, is a Public Health Analyst, Centers for Disease Control and Prevention, Division of Vector-Borne Diseases, Fort Collins, Colorado
| | - Vance Brown
- Vance Brown, MA, is Deputy Program Director, Centers for Disease Control and Prevention, Division of Global Health Protection, Kampala, Uganda
| | - Grace D Appiah
- Grace D. Appiah, MD, MS, is a Medical Epidemiologist, Division of Foodborne, Waterborne, and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Eric D Mintz
- Eric D. Mintz, MD, MPH, is a Medical Epidemiologist, Division of Foodborne, Waterborne, and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Jaco Homsy
- Jaco Homsy, MD, MPH, is Program Director, Centers for Disease Control and Prevention, Division of Global Health Protection, Kampala, Uganda
| | - George S Odongo
- George S. Odongo, MPH, is a Public Health Informatics Fellow, Division of Global Health Protection, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Raymond L Ransom
- Raymond L. Ransom is Associate Director for Informatics, Division of Global Health Protection, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Molly M Freeman
- Molly M. Freeman, PhD, is a Microbiologist, Division of Foodborne, Waterborne, and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Robyn A Stoddard
- Robyn A. Stoddard, DVM, PhD, Microbiologists, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Renee Galloway
- Renee Galloway, MLS, MPH, Microbiologists, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Matthew Mikoleit
- Matthew Mikoleit, MS, is a Microbiologist, Division of Global Health Protection, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Cecilia Kato
- Cecilia Kato, PhD, is a Biologist, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Ronald Rosenberg
- Ronald Rosenberg, ScD, is Associate Director for Science, Centers for Disease Control and Prevention, Division of Vector-Borne Diseases, Fort Collins, Colorado
| | - Eric C Mossel
- Eric C. Mossel, PhD, is a Microbiologist, Centers for Disease Control and Prevention, Division of Vector-Borne Diseases, Fort Collins, Colorado
| | - Paul S Mead
- Paul S. Mead, MD, MPH, is a Medical Officer, Centers for Disease Control and Prevention, Division of Vector-Borne Diseases, Fort Collins, Colorado
| | - Kiersten J Kugeler
- Kiersten Kugeler, PhD, MPH, is an Epidemiologist, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO
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9
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Fagre AC, Lee JS, Kityo RM, Bergren NA, Mossel EC, Nakayiki T, Nalikka B, Nyakarahuka L, Gilbert AT, Peterhans JK, Crabtree MB, Towner JS, Amman BR, Sealy TK, Schuh AJ, Nichol ST, Lutwama JJ, Miller BR, Kading RC. Discovery and Characterization of Bukakata orbivirus ( Reoviridae:Orbivirus), a Novel Virus from a Ugandan Bat. Viruses 2019; 11:E209. [PMID: 30832334 PMCID: PMC6466370 DOI: 10.3390/v11030209] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 02/26/2019] [Accepted: 02/26/2019] [Indexed: 12/19/2022] Open
Abstract
While serological and virological evidence documents the exposure of bats to medically-important arboviruses, their role as reservoirs or amplifying hosts is less well-characterized. We describe a novel orbivirus (Reoviridae:Orbivirus) isolated from an Egyptian fruit bat (Rousettus aegyptiacus leachii) trapped in 2013 in Uganda and named Bukakata orbivirus. This is the fifth orbivirus isolated from a bat, however genetic information had previously only been available for one bat-associated orbivirus. We performed whole-genome sequencing on Bukakata orbivirus and three other bat-associated orbiviruses (Fomede, Ife, and Japanaut) to assess their phylogenetic relationship within the genus Orbivirus and develop hypotheses regarding potential arthropod vectors. Replication kinetics were assessed for Bukakata orbivirus in three different vertebrate cell lines. Lastly, qRT-PCR and nested PCR were used to determine the prevalence of Bukakata orbivirus RNA in archived samples from three populations of Egyptian fruit bats and one population of cave-associated soft ticks in Uganda. Complete coding sequences were obtained for all ten segments of Fomede, Ife, and Japanaut orbiviruses and for nine of the ten segments for Bukakata orbivirus. Phylogenetic analysis placed Bukakata and Fomede in the tick-borne orbivirus clade and Ife and Japanaut within the Culicoides/phlebotomine sandfly orbivirus clade. Further, Bukakata and Fomede appear to be serotypes of the Chobar Gorge virus species. Bukakata orbivirus replicated to high titers (10⁶⁻10⁷ PFU/mL) in Vero, BHK-21 [C-13], and R06E (Egyptian fruit bat) cells. Preliminary screening of archived bat and tick samples do not support Bukakata orbivirus presence in these collections, however additional testing is warranted given the phylogenetic associations observed. This study provided complete coding sequence for several bat-associated orbiviruses and in vitro characterization of a bat-associated orbivirus. Our results indicate that bats may play an important role in the epidemiology of viruses in the genus Orbivirus and further investigation is warranted into vector-host associations and ongoing surveillance efforts.
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Affiliation(s)
- Anna C Fagre
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
| | - Justin S Lee
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
| | - Robert M Kityo
- Department of Zoology, Entomology and Fisheries Sciences, Makerere University, Kampala, Uganda.
| | - Nicholas A Bergren
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
| | - Eric C Mossel
- Arboviral Diseases Branch, Division of Vector-borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO 80523, USA.
| | - Teddy Nakayiki
- Department of Arbovirology, Emerging, and Re-emerging Viral Infections, Uganda Virus Research Institute, Entebbe, Uganda.
| | - Betty Nalikka
- Department of Zoology, Entomology and Fisheries Sciences, Makerere University, Kampala, Uganda.
| | - Luke Nyakarahuka
- Department of Arbovirology, Emerging, and Re-emerging Viral Infections, Uganda Virus Research Institute, Entebbe, Uganda.
- Department of Biosecurity, Ecosystems and Veterinary Public Health, Makerere University, Kampala, Uganda.
| | - Amy T Gilbert
- National Wildlife Research Center, US Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, Fort Collins, CO 80521, USA.
| | - Julian Kerbis Peterhans
- College of Arts and Sciences, Roosevelt University, Collections & Research, The Field Museum of Natural History, Chicago, IL 60605, USA.
| | - Mary B Crabtree
- Arboviral Diseases Branch, Division of Vector-borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO 80523, USA.
| | - Jonathan S Towner
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
| | - Brian R Amman
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
| | - Tara K Sealy
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
| | - Amy J Schuh
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
- United States Public Health Service, Commissioned Corps, Rockville, MD 20852, USA.
| | - Stuart T Nichol
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
| | - Julius J Lutwama
- Department of Arbovirology, Emerging, and Re-emerging Viral Infections, Uganda Virus Research Institute, Entebbe, Uganda.
| | - Barry R Miller
- Arboviral Diseases Branch, Division of Vector-borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO 80523, USA.
| | - Rebekah C Kading
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
- Arboviral Diseases Branch, Division of Vector-borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO 80523, USA.
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10
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Abstract
In April 2016, a yellow fever outbreak was detected in Uganda. Removal of contaminating ribosomal RNA in a clinical sample improved the sensitivity of next-generation sequencing. Molecular analyses determined the Uganda yellow fever outbreak was distinct from the concurrent yellow fever outbreak in Angola, improving our understanding of yellow fever epidemiology.
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11
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Kayiwa JT, Nankya AM, Ataliba IJ, Mossel EC, Crabtree MB, Lutwama JJ. Confirmation of Zika virus infection through hospital-based sentinel surveillance of acute febrile illness in Uganda, 2014-2017. J Gen Virol 2018; 99:1248-1252. [PMID: 29975185 DOI: 10.1099/jgv.0.001113] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Zika virus (ZIKV), transmitted by Aedes species mosquitoes, was first isolated in Uganda in 1947. From February 2014 to October 2017, the Uganda Virus Research Institute, in collaboration with the US Centers for Diseases Control and Prevention, conducted arbovirus surveillance in acute febrile illness (AFI) patients at St Francis hospital in Nkonkonjeru. Three hundred and eighty-four serum samples were collected and tested for IgM antibodies to yellow fever virus (YFV), West Nile virus (WNV), dengue virus (DENV), chikungunya virus (CHIKV) and ZIKV. Of the 384 samples, 5 were positive for ZIKV IgM. Of these five, three were confirmed by plaque reduction neutralization test (PRNT) to be ZIKV infections. Of the remaining two, one was determined to be a non-specific flavivirus infection and one was confirmed to be alphavirus-positive by reverse transcriptase polymerase chain reaction (RT-PCR). This study provides the first evidence of laboratory-confirmed ZIKV infection in Uganda in five decades, and emphasizes the need to enhance sentinel surveillance.
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Affiliation(s)
| | | | | | - Eric C Mossel
- 2Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Mary B Crabtree
- 2Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, USA
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12
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Blitvich BJ, Beaty BJ, Blair CD, Brault AC, Dobler G, Drebot MA, Haddow AD, Kramer LD, LaBeaud AD, Monath TP, Mossel EC, Plante K, Powers AM, Tesh RB, Turell MJ, Vasilakis N, Weaver SC. Bunyavirus Taxonomy: Limitations and Misconceptions Associated with the Current ICTV Criteria Used for Species Demarcation. Am J Trop Med Hyg 2018; 99:11-16. [PMID: 29692303 PMCID: PMC6085805 DOI: 10.4269/ajtmh.18-0038] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 02/27/2018] [Indexed: 01/31/2023] Open
Abstract
The International Committee on Taxonomy of Viruses (ICTV) has implemented numerous changes to the taxonomic classification of bunyaviruses over the years. Whereas most changes have been justified and necessary because of the need to accommodate newly discovered and unclassified viruses, other changes are a cause of concern, especially the decision to demote scores of formerly recognized species to essentially strains of newly designated species. This practice was first described in the seventh taxonomy report of the ICTV and has continued in all subsequent reports. In some instances, viruses that share less than 75% nucleotide sequence identity across their genomes, produce vastly different clinical presentations, possess distinct vector and host associations, have different biosafety recommendations, and occur in nonoverlapping geographic regions are classified as strains of the same species. Complicating the matter is the fact that virus strains have been completely eliminated from ICTV reports; thus, critically important information on virus identities and their associated biological and epidemiological features cannot be readily related to the ICTV classification. Here, we summarize the current status of bunyavirus taxonomy and discuss the adverse consequences associated with the reclassification and resulting omission of numerous viruses of public health importance from ICTV reports. As members of the American Committee on Arthropod-borne Viruses, we encourage the ICTV Bunyavirus Study Group to reconsider their stance on bunyavirus taxonomy, to revise the criteria currently used for species demarcation, and to list additional strains of public and veterinary importance.
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Affiliation(s)
- Bradley J. Blitvich
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa
| | - Barry J. Beaty
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado
| | - Carol D. Blair
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado
| | - Aaron C. Brault
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado
| | | | - Michael A. Drebot
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Canada
| | - Andrew D. Haddow
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Maryland
| | - Laura D. Kramer
- Arbovirus Laboratory, Wadsworth Center, New York State Department of Health and School of Public Health, State University of New York, Albany, New York
| | - Angelle Desiree LaBeaud
- Division of Infectious Diseases, Department of Pediatrics, Stanford University School of Medicine, Stanford, California
| | | | - Eric C. Mossel
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado
| | - Kenneth Plante
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, Texas
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas
| | - Ann M. Powers
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado
| | - Robert B. Tesh
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, Texas
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas
- Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas
| | | | - Nikos Vasilakis
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, Texas
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas
- Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas
- Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Scott C. Weaver
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, Texas
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas
- Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas
- Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
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13
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Mutebi JP, Crabtree MB, Kading RC, Powers AM, Ledermann JP, Mossel EC, Zeidner N, Lutwama JJ, Miller BR. Mosquitoes of Northwestern Uganda. J Med Entomol 2018; 55:587-599. [PMID: 29444287 PMCID: PMC9422952 DOI: 10.1093/jme/tjx220] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Indexed: 06/08/2023]
Abstract
Despite evidence of arbovirus activity in northwestern Uganda (West Nile Sub-region), there is very limited information on the mosquito fauna of this region. The only published study reported 52 mosquito species in northwestern Uganda but this study took place in 1950 and the information has not been updated for more than 60 yr. In January and June 2011, CO2 baited-light traps were used to collect 49,231 mosquitoes from four different locations, Paraa (9,487), Chobe (20,025), Sunguru (759), and Rhino Camp (18,960). Overall, 72 mosquito species representing 11 genera were collected. The largest number of distinct species was collected at Chobe (43 species), followed by Paraa (40), Sunguru (34), and Rhino Camp (25). Only eight of the 72 species (11.1%) were collected from all four sites: Aedes (Stegomyia) aegypti formosus (Walker), Anopheles (Cellia) funestus group, Culex (Culex) decens group, Cx. (Culex) neavei Theobald, Cx. (Culex) univittatus Theobald, Cx. (Culiciomyia) cinereus Theobald, Cx. (Oculeomyia) poicilipes (Theobald), and Mansonia (Mansonoides) uniformis (Theobald). Fifty-four species were detected in northwestern Uganda for the first time; however, these species have been detected elsewhere in Uganda and do not represent new introductions to the country. Thirty-three species collected during this study have previously been implicated in the transmission of arboviruses of public health importance.
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Affiliation(s)
- J-P Mutebi
- Centers for Disease Control and Prevention (CDC), Fort Collins, CO
| | - M B Crabtree
- Centers for Disease Control and Prevention (CDC), Fort Collins, CO
| | - R C Kading
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO
| | - A M Powers
- Centers for Disease Control and Prevention (CDC), Fort Collins, CO
| | - J P Ledermann
- Centers for Disease Control and Prevention (CDC), Fort Collins, CO
| | - E C Mossel
- Centers for Disease Control and Prevention (CDC), Fort Collins, CO
| | - N Zeidner
- Centers for Disease Control and Prevention (CDC), Fort Collins, CO
| | - J J Lutwama
- Department of Arbovirology, Uganda Virus Research Institute (UVRI), Entebbe, Uganda
| | - B R Miller
- Centers for Disease Control and Prevention (CDC), Fort Collins, CO
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14
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Kading RC, Kityo RM, Mossel EC, Borland EM, Nakayiki T, Nalikka B, Nyakarahuka L, Ledermann JP, Panella NA, Gilbert AT, Crabtree MB, Peterhans JK, Towner JS, Amman BR, Sealy TK, Nichol ST, Powers AM, Lutwama JJ, Miller BR. Neutralizing antibodies against flaviviruses, Babanki virus, and Rift Valley fever virus in Ugandan bats. Infect Ecol Epidemiol 2018; 8:1439215. [PMID: 29511459 PMCID: PMC5827769 DOI: 10.1080/20008686.2018.1439215] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 02/02/2018] [Indexed: 11/24/2022] Open
Abstract
Introduction: A number of arboviruses have previously been isolated from naturally-infected East African bats, however the role of bats in arbovirus maintenance is poorly understood. The aim of this study was to investigate the exposure history of Ugandan bats to a panel of arboviruses. Materials and methods: Insectivorous and fruit bats were captured from multiple locations throughout Uganda during 2009 and 2011–2013. All serum samples were tested for neutralizing antibodies against West Nile virus (WNV), yellow fever virus (YFV), dengue 2 virus (DENV-2), Zika virus (ZIKV), Babanki virus (BBKV), and Rift Valley fever virus (RVFV) by plaque reduction neutralization test (PRNT). Sera from up to 626 bats were screened for antibodies against each virus. Results and Discussion: Key findings include the presence of neutralizing antibodies against RVFV in 5/52 (9.6%) of little epauletted fruit bats (Epomophorus labiatus) captured from Kawuku and 3/54 (5.6%) Egyptian rousette bats from Kasokero cave. Antibodies reactive to flaviviruses were widespread across bat taxa and sampling locations. Conclusion: The data presented demonstrate the widespread exposure of bats in Uganda to arboviruses, and highlight particular virus-bat associations that warrant further investigation.
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Affiliation(s)
- Rebekah C Kading
- Division of Vector-borne Diseases, Arbovirus Diseases Branch, Centers for Disease Control and Prevention, Fort Collins, CO, USA.,Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO, USA
| | - Robert M Kityo
- Department of Biological Sciences, Makerere University, Kampala, Uganda
| | - Eric C Mossel
- Division of Vector-borne Diseases, Arbovirus Diseases Branch, Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Erin M Borland
- Division of Vector-borne Diseases, Arbovirus Diseases Branch, Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Teddie Nakayiki
- Department of Arbovirology, Emerging, and Re-emerging Viral Infections, Uganda Virus Research Institute, Entebbe, Uganda
| | - Betty Nalikka
- Department of Biological Sciences, Makerere University, Kampala, Uganda
| | - Luke Nyakarahuka
- Department of Arbovirology, Emerging, and Re-emerging Viral Infections, Uganda Virus Research Institute, Entebbe, Uganda
| | - Jeremy P Ledermann
- Division of Vector-borne Diseases, Arbovirus Diseases Branch, Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Nicholas A Panella
- Division of Vector-borne Diseases, Arbovirus Diseases Branch, Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Amy T Gilbert
- Division of High Consequence Pathogens, Rabies and Poxvirus Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA.,USA Department of Agriculture, Animal and Plant Health Inspection Service, Fort Collins, CO, USA
| | - Mary B Crabtree
- Division of Vector-borne Diseases, Arbovirus Diseases Branch, Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Julian Kerbis Peterhans
- College of Professional Studies, Roosevelt University & Collections & Research, The Field Museum of Natural History, Chicago, IL, USA
| | - Jonathan S Towner
- Division of High Consequence Pathogens, Viral Special Pathogens Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Brian R Amman
- Division of High Consequence Pathogens, Viral Special Pathogens Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Tara K Sealy
- Division of High Consequence Pathogens, Viral Special Pathogens Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Stuart T Nichol
- Division of High Consequence Pathogens, Viral Special Pathogens Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Ann M Powers
- Division of Vector-borne Diseases, Arbovirus Diseases Branch, Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Julius J Lutwama
- Department of Arbovirology, Emerging, and Re-emerging Viral Infections, Uganda Virus Research Institute, Entebbe, Uganda
| | - Barry R Miller
- Division of Vector-borne Diseases, Arbovirus Diseases Branch, Centers for Disease Control and Prevention, Fort Collins, CO, USA
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15
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Mossel EC, Crabtree MB, Mutebi JP, Lutwama JJ, Borland EM, Powers AM, Miller BR. Arboviruses Isolated From Mosquitoes Collected in Uganda, 2008-2012. J Med Entomol 2017; 54:1403-1409. [PMID: 28874015 PMCID: PMC5968633 DOI: 10.1093/jme/tjx120] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Indexed: 06/07/2023]
Abstract
A large number of arthropod-borne viruses are endemic to East Africa. As a part of the process of undertaking a systematic characterization of the mosquito fauna of Uganda, we examined mosquitoes collected from 2008 through early 2012 for known and novel viruses. In all, 8,288 mosquito pools containing 157,554 mosquitoes were tested. Twenty-nine isolations of 11 different viruses were made from mosquitoes of nine distinct species and from pools identified only to genus Culex. Identified viruses were from family Togaviridae, alphaviruses Sindbis and Babanki viruses; family Rhabdoviridae, hapaviruses Mossuril and Kamese viruses; family Flaviviridae, flaviviruses West Nile and Usutu viruses; family Phenuiviridae, phlebovirus Arumowot virus; and family Peribunyaviridae, orthobunyaviruses Witwatersrand, Pongola, and Germiston viruses. In addition, a novel orthobunyavirus, provisionally named Mburo virus, was isolated from Coquillettidia metallica (Theobald). This is the first report of Babanki, Arumowot, and Mossuril virus isolation from Uganda.
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Affiliation(s)
- Eric C. Mossel
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Rd., Fort Collins, CO 80521 (; ; ; ; ; )
- Corresponding author, e-mail:
| | - Mary B. Crabtree
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Rd., Fort Collins, CO 80521 (; ; ; ; ; )
| | - John-Paul Mutebi
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Rd., Fort Collins, CO 80521 (; ; ; ; ; )
| | - Julius J. Lutwama
- Department of Arbovirology, Uganda Virus Research Institute (UVRI), PO Box 49, Entebbe, Uganda ()
| | - Erin M. Borland
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Rd., Fort Collins, CO 80521 (; ; ; ; ; )
| | - Ann M. Powers
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Rd., Fort Collins, CO 80521 (; ; ; ; ; )
| | - Barry R. Miller
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Rd., Fort Collins, CO 80521 (; ; ; ; ; )
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16
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Styczynski AR, Malta JMAS, Krow-Lucal ER, Percio J, Nóbrega ME, Vargas A, Lanzieri TM, Leite PL, Staples JE, Fischer MX, Powers AM, Chang GJJ, Burns PL, Borland EM, Ledermann JP, Mossel EC, Schonberger LB, Belay EB, Salinas JL, Badaro RD, Sejvar JJ, Coelho GE. Increased rates of Guillain-Barré syndrome associated with Zika virus outbreak in the Salvador metropolitan area, Brazil. PLoS Negl Trop Dis 2017; 11:e0005869. [PMID: 28854206 PMCID: PMC5595339 DOI: 10.1371/journal.pntd.0005869] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 09/12/2017] [Accepted: 08/12/2017] [Indexed: 01/02/2023] Open
Abstract
In mid-2015, Salvador, Brazil, reported an outbreak of Guillain-Barré syndrome (GBS), coinciding with the introduction and spread of Zika virus (ZIKV). We found that GBS incidence during April–July 2015 among those ≥12 years of age was 5.6 cases/100,000 population/year and increased markedly with increasing age to 14.7 among those ≥60 years of age. We conducted interviews with 41 case-patients and 85 neighborhood controls and found no differences in demographics or exposures prior to GBS-symptom onset. A higher proportion of case-patients (83%) compared to controls (21%) reported an antecedent illness (OR 18.1, CI 6.9–47.5), most commonly characterized by rash, headache, fever, and myalgias, within a median of 8 days prior to GBS onset. Our investigation confirmed an outbreak of GBS, particularly in older adults, that was strongly associated with Zika-like illness and geo-temporally associated with ZIKV transmission, suggesting that ZIKV may result in severe neurologic complications. Shortly following the introduction of Zika virus (ZIKV), a type of flavivirus transmitted by mosquitoes, into Brazil in early 2015, the Brazil Ministry of Health began receiving increased reports of a paralyzing condition known as Guillain-Barré syndrome (GBS). The areas with the greatest number of GBS cases appeared to correlate geographically and temporally with the areas reporting the highest rate of ZIKV infections. This association had been previously observed during a ZIKV outbreak in French Polynesia, however, this had not been systematically examined in a case-control investigation for the ZIKV outbreak in South America. In this investigation, the authors found that the occurrence of GBS in the affected population was nearly four times higher than would be expected, and the risk for GBS was particularly elevated among older adults. GBS was associated with ZIKV-like symptoms and with a combination of ZIKV-like symptoms plus laboratory evidence of a recent flavivirus infection. Taken together, these findings provide strong support for and greater understanding of the link between ZIKV and GBS.
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Affiliation(s)
- Ashley R. Styczynski
- National Center for Emerging Zoonotic and Infectious Diseases, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
- * E-mail: ,
| | - Juliane M. A. S. Malta
- Program for Control and Prevention of Malaria and Diseases Transmitted by Aedes, Brazil Ministry of Health, Brasília, Federal District, Brazil
| | - Elisabeth R. Krow-Lucal
- National Center for Emerging Zoonotic and Infectious Diseases, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Jadher Percio
- Department of Communicable Disease Surveillance, Brazil Ministry of Health, Brasília, Federal District, Brazil
| | - Martha E. Nóbrega
- Department of Communicable Disease Surveillance, Brazil Ministry of Health, Brasília, Federal District, Brazil
| | - Alexander Vargas
- Department of Communicable Disease Surveillance, Brazil Ministry of Health, Brasília, Federal District, Brazil
| | - Tatiana M. Lanzieri
- National Center for Immunization and Respiratory Diseases, Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Priscila L. Leite
- Program for Control and Prevention of Malaria and Diseases Transmitted by Aedes, Brazil Ministry of Health, Brasília, Federal District, Brazil
| | - J. Erin Staples
- National Center for Emerging Zoonotic and Infectious Diseases, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Marc X. Fischer
- National Center for Emerging Zoonotic and Infectious Diseases, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Ann M. Powers
- National Center for Emerging Zoonotic and Infectious Diseases, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Gwong-Jen J. Chang
- National Center for Emerging Zoonotic and Infectious Diseases, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - P. L. Burns
- National Center for Emerging Zoonotic and Infectious Diseases, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Erin M. Borland
- National Center for Emerging Zoonotic and Infectious Diseases, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Jeremy P. Ledermann
- National Center for Emerging Zoonotic and Infectious Diseases, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Eric C. Mossel
- National Center for Emerging Zoonotic and Infectious Diseases, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Lawrence B. Schonberger
- National Center for Emerging Zoonotic and Infectious Diseases, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Ermias B. Belay
- National Center for Emerging Zoonotic and Infectious Diseases, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Jorge L. Salinas
- National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Division of Tuberculosis Elimination, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Roberto D. Badaro
- Federal University of Bahia, Complexo Hospitalar Edgard Santos, Salvador, Bahia, Brazil
| | - James J. Sejvar
- National Center for Emerging Zoonotic and Infectious Diseases, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Giovanini E. Coelho
- Department of Communicable Disease Surveillance, Brazil Ministry of Health, Brasília, Federal District, Brazil
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Thompson KR, Mossel EC, Federman B, Claborn DM. Does Reducing Time to Identification of Infectious Agents Reduce Incidence Rates of Norovirus in a Population Deployed to Southwest Asia? US Army Med Dep J 2016:42-51. [PMID: 27613209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
During its deployment to Kuwait from 2011-2012, the 983rd Medical Detachment (Preventive Medicine) was augmented with a 4-person laboratory section which provided polymerase chain reaction capabilities not normally associated with an Army Level III preventive medicine detachment. Although common in many civilian laboratories, this was the first time this equipment was used by a deployed Level III Army preventive medicine detachment to identify an outbreak in this theater. It allowed rapid identification and description of a gastrointestinal disease outbreak caused by norovirus in Kuwait. The technology contributed to a decreased time required to identification of the causative agent (hours vs days) and thus the implementation of appropriate preventive measures. Based on this event, the authors suggest the addition of a modified laboratory section to the modified table of organization equipment for deployable preventive medicine detachments.
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Affiliation(s)
- Kip R Thompson
- Master of Public Health Program, Missouri State University, Springfield, Missouri
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18
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Honnold SP, Mossel EC, Bakken RR, Lind CM, Cohen JW, Eccleston LT, Spurgers KB, Erwin-Cohen R, Glass PJ, Maheshwari RK. Eastern equine encephalitis virus in mice II: pathogenesis is dependent on route of exposure. Virol J 2015; 12:154. [PMID: 26423229 PMCID: PMC4589026 DOI: 10.1186/s12985-015-0385-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 09/16/2015] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Eastern equine encephalitis virus (EEEV) is an alphavirus with a case fatality rate estimated to be as high as 75 % in humans and 90 % in horses. Surviving patients often have long-lasting and severe neurological sequelae. At present, there is no licensed vaccine or therapeutic for EEEV infection. This study completes the clinical and pathological analysis of mice infected with a North American strain of EEEV by three different routes: aerosol, intranasal, and subcutaneous. Such an understanding is imperative for use of the mouse model in vaccine and antiviral drug development. METHODS Twelve-week-old female BALB/c mice were infected with EEEV strain FL93-939 by the intranasal, aerosol, or subcutaneous route. Mice were euthanized 6 hpi through 8 dpi and tissues were harvested for histopathological and immunohistochemical analysis. RESULTS Viral antigen was detected in the olfactory bulb as early as 1-2 dpi in aerosol and intranasal infected mice. However, histologic lesions in the brain were evident about 24 hours earlier (3 dpi vs 4 dpi), and were more pronounced following aerosol infection relative to intranasal infection. Following subcutaneous infection, viral antigen was also detected in the olfactory bulb, though not as routinely or as early. Significant histologic lesions were not observed until 6 dpi. CONCLUSION These pathologic studies suggest EEEV enters the brain through the olfactory system when mice are exposed via the intranasal and aerosol routes. In contrast, the histopathologic lesions were delayed in the subcutaneous group and it appears the virus may utilize both the vascular and olfactory routes to enter the brain when mice are exposed to EEEV subcutaneously.
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Affiliation(s)
- Shelley P Honnold
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, 21702, USA. .,Department of Pathology, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD, 20814, USA.
| | - Eric C Mossel
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, 21702, USA.
| | - Russell R Bakken
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, 21702, USA.
| | - Cathleen M Lind
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, 21702, USA.
| | - Jeffrey W Cohen
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, 21702, USA.
| | - Lori T Eccleston
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, 21702, USA.
| | - Kevin B Spurgers
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, 21702, USA.
| | - Rebecca Erwin-Cohen
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, 21702, USA.
| | - Pamela J Glass
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, 21702, USA.
| | - Radha K Maheshwari
- Department of Pathology, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD, 20814, USA.
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Rajasingham R, Rhein J, Klammer K, Musubire A, Nabeta H, Akampurira A, Mossel EC, Williams DA, Boxrud DJ, Crabtree MB, Miller BR, Rolfes MA, Tengsupakul S, Andama AO, Meya DB, Boulware DR. Epidemiology of meningitis in an HIV-infected Ugandan cohort. Am J Trop Med Hyg 2014; 92:274-9. [PMID: 25385864 DOI: 10.4269/ajtmh.14-0452] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
There is limited understanding of the epidemiology of meningitis among human immunodeficiency virus (HIV)-infected populations in sub-Saharan Africa. We conducted a prospective cohort study of HIV-infected adults with suspected meningitis in Uganda, to comprehensively evaluate the etiologies of meningitis. Intensive cerebrospiral fluid (CSF) testing was performed to evaluate for bacterial, viral, fungal, and mycobacterial etiologies, including neurosyphilis,16s ribosomal DNA (rDNA) polymerase chain reaction (PCR) for bacteria, Plex-ID broad viral assay, quantitative-PCR for HSV-1/2, cytomegalovirus (CMV), Epstein-Barr virus (EBV), and Toxoplasma gondii; reverse transcription-PCR (RT-PCR) for Enteroviruses and arboviruses, and Xpert MTB/RIF assay. Cryptococcal meningitis accounted for 60% (188 of 314) of all causes of meningitis. Of 117 samples sent for viral PCR, 36% were EBV positive. Among cryptococcal antigen negative patients, the yield of Xpert MTB/RIF assay was 22% (8 of 36). After exclusion of cryptococcosis and bacterial meningitis, 61% (43 of 71) with an abnormal CSF profile had no definitive diagnosis. Exploration of new TB diagnostics and diagnostic algorithms for evaluation of meningitis in resource-limited settings remains needed, and implementation of cryptococcal diagnostics is critical.
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Affiliation(s)
- Radha Rajasingham
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Joshua Rhein
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Kate Klammer
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Abdu Musubire
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Henry Nabeta
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Andrew Akampurira
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Eric C Mossel
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Darlisha A Williams
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Dave J Boxrud
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Mary B Crabtree
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Barry R Miller
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Melissa A Rolfes
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Supatida Tengsupakul
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Alfred O Andama
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - David B Meya
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - David R Boulware
- University of Minnesota, Minneapolis, Minnesota; Infectious Disease Institute, Makerere University, Kampala, Uganda; Minnesota Department of Health, St. Paul, Minnesota; Centers for Disease Control and Prevention, Fort Collins, Colorado; Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
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Kading RC, Gilbert AT, Mossel EC, Crabtree MB, Kuzmin IV, Niezgoda M, Agwanda B, Markotter W, Weil MR, Montgomery JM, Rupprecht CE, Miller BR. Isolation and molecular characterization of Fikirini rhabdovirus, a novel virus from a Kenyan bat. J Gen Virol 2013; 94:2393-2398. [PMID: 23939976 DOI: 10.1099/vir.0.053983-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Zoonotic and vector-borne pathogens have comprised a significant component of emerging human infections in recent decades, and bats are increasingly recognized as reservoirs for many of these disease agents. To identify novel pathogens associated with bats, we screened tissues of bats collected in Kenya. Virus isolates were identified by next generation sequencing of viral nucleic acid preparations from the infected cell culture supernatant and characterized. Here we report the identification of Fikirini rhabdovirus, a novel rhabdovirus isolated from a bat, Hipposideros vittatus, captured along the Kenyan coast.
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Affiliation(s)
- Rebekah C Kading
- Centers for Disease Control and Prevention, Division of Vector-borne Diseases, Arbovirus Diseases Branch, Fort Collins, CO, USA
| | - Amy T Gilbert
- Centers for Disease Control and Prevention, Division of High Consequence Pathogens and Pathology, Poxvirus and Rabies Branch, Atlanta, GA, USA
| | - Eric C Mossel
- Centers for Disease Control and Prevention, Division of Vector-borne Diseases, Arbovirus Diseases Branch, Fort Collins, CO, USA
| | - Mary B Crabtree
- Centers for Disease Control and Prevention, Division of Vector-borne Diseases, Arbovirus Diseases Branch, Fort Collins, CO, USA
| | - Ivan V Kuzmin
- Centers for Disease Control and Prevention, Division of High Consequence Pathogens and Pathology, Poxvirus and Rabies Branch, Atlanta, GA, USA
| | - Michael Niezgoda
- Centers for Disease Control and Prevention, Division of High Consequence Pathogens and Pathology, Poxvirus and Rabies Branch, Atlanta, GA, USA
| | | | - Wanda Markotter
- University of Pretoria, Department of Microbiology and Plant Pathology, Pretoria, South Africa
| | - M Ryan Weil
- Centers for Disease Control and Prevention, Office of Infectious Disease, National Center for Emerging and Zoonotic Infectious Diseases, Atlanta, GA, USA.,SRA International, Atlanta, GA, USA
| | - Joel M Montgomery
- Centers for Disease Control and Prevention, Global Disease Detection Program, Nairobi, Kenya
| | - Charles E Rupprecht
- Centers for Disease Control and Prevention, Division of High Consequence Pathogens and Pathology, Poxvirus and Rabies Branch, Atlanta, GA, USA
| | - Barry R Miller
- Centers for Disease Control and Prevention, Division of Vector-borne Diseases, Arbovirus Diseases Branch, Fort Collins, CO, USA
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21
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Mossel EC, Ledermann JP, Phillips AT, Borland EM, Powers AM, Olson KE. Molecular determinants of mouse neurovirulence and mosquito infection for Western equine encephalitis virus. PLoS One 2013; 8:e60427. [PMID: 23544138 PMCID: PMC3609757 DOI: 10.1371/journal.pone.0060427] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 02/25/2013] [Indexed: 11/26/2022] Open
Abstract
Western equine encephalitis virus (WEEV) is a naturally occurring recombinant virus derived from ancestral Sindbis and Eastern equine encephalitis viruses. We previously showed that infection by WEEV isolates McMillan (McM) and IMP-181 (IMP) results in high (∼90–100%) and low (0%) mortality, respectively, in outbred CD-1 mice when virus is delivered by either subcutaneous or aerosol routes. However, relatively little is known about specific virulence determinants of WEEV. We previously observed that IMP infected Culex tarsalis mosquitoes at a high rate (app. 80%) following ingestion of an infected bloodmeal but these mosquitoes were infected by McM at a much lower rate (10%). To understand the viral role in these phenotypic differences, we characterized the pathogenic phenotypes of McM/IMP chimeras. Chimeras encoding the E2 of McM on an IMP backbone (or the reciprocal) had the most significant effect on infection phenotypes in mice or mosquitoes. Furthermore, exchanging the arginine, present on IMP E2 glycoprotein at position 214, for the glutamine present at the same position on McM, ablated mouse mortality. Curiously, the reciprocal exchange did not confer mouse virulence to the IMP virus. Mosquito infectivity was also determined and significantly, one of the important loci was the same as the mouse virulence determinant identified above. Replacing either IMP E2 amino acid 181 or 214 with the corresponding McM amino acid lowered mosquito infection rates to McM-like levels. As with the mouse neurovirulence, reciprocal exchange of amino acids did not confer mosquito infectivity. The identification of WEEV E2 amino acid 214 as necessary for both IMP mosquito infectivity and McM mouse virulence indicates that they are mutually exclusive phenotypes and suggests an explanation for the lack of human or equine WEE cases even in the presence of active transmission.
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Affiliation(s)
- Eric C. Mossel
- Arthropod-borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
- Division of Vector-Borne Infectious Diseases, Centers for Disease Control, Fort Collins, Colorado, United States of America
| | - Jeremy P. Ledermann
- Division of Vector-Borne Infectious Diseases, Centers for Disease Control, Fort Collins, Colorado, United States of America
| | - Aaron T. Phillips
- Arthropod-borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Erin M. Borland
- Division of Vector-Borne Infectious Diseases, Centers for Disease Control, Fort Collins, Colorado, United States of America
| | - Ann M. Powers
- Division of Vector-Borne Infectious Diseases, Centers for Disease Control, Fort Collins, Colorado, United States of America
| | - Ken E. Olson
- Arthropod-borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
- * E-mail:
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22
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Saxton-Shaw KD, Ledermann JP, Borland EM, Stovall JL, Mossel EC, Singh AJ, Wilusz J, Powers AM. O'nyong nyong virus molecular determinants of unique vector specificity reside in non-structural protein 3. PLoS Negl Trop Dis 2013; 7:e1931. [PMID: 23359824 PMCID: PMC3554527 DOI: 10.1371/journal.pntd.0001931] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 10/16/2012] [Indexed: 11/18/2022] Open
Abstract
O'nyong nyong virus (ONNV) and Chikungunya virus (CHIKV) are two closely related alphaviruses with very different infection patterns in the mosquito, Anopheles gambiae. ONNV is the only alphavirus transmitted by anopheline mosquitoes, but specific molecular determinants of infection of this unique vector specificity remain unidentified. Fifteen distinct chimeric viruses were constructed to evaluate both structural and non-structural regions of the genome and infection patterns were determined through artificial infectious feeds in An. gambiae with each of these chimeras. Only one region, non-structural protein 3 (nsP3), was sufficient to up-regulate infection to rates similar to those seen with parental ONNV. When ONNV non-structural protein 3 (nsP3) replaced nsP3 from CHIKV virus in one of the chimeric viruses, infection rates in An. gambiae went from 0% to 63.5%. No other single gene or viral region addition was able to restore infection rates. Thus, we have shown that a non-structural genome element involved in viral replication is a major element involved in ONNV's unique vector specificity.
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Affiliation(s)
- Kali D. Saxton-Shaw
- Division of Vector Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Jeremy P. Ledermann
- Division of Vector Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Erin M. Borland
- Division of Vector Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Janae L. Stovall
- Division of Vector Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Eric C. Mossel
- Division of Vector Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Amber J. Singh
- Division of Vector Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Jeffrey Wilusz
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Ann M. Powers
- Division of Vector Borne Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
- * E-mail:
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23
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Logue CH, Phillips AT, Mossel EC, Ledermann JP, Welte T, Dow SW, Olson KE, Powers AM. Treatment with cationic liposome-DNA complexes (CLDCs) protects mice from lethal Western equine encephalitis virus (WEEV) challenge. Antiviral Res 2010; 87:195-203. [PMID: 20452378 PMCID: PMC3568752 DOI: 10.1016/j.antiviral.2010.04.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Revised: 04/23/2010] [Accepted: 04/30/2010] [Indexed: 12/28/2022]
Abstract
Having recently characterized a CD-1 outbred mouse model of pathogenesis for Western equine encephalitis virus, we examined the possible protective effects of cationic liposome-DNA complexes (CLDCs) against encephalitic arboviral infection. In this investigation, mice were pre-treated, co-treated, or post-treated with CLDC then challenged with a subcutaneous or aerosol dose of the highly virulent WEEV-McMillan strain, lethal in mice 4-5 days after inoculation. Pre-treatment with CLDCs provided a significant protective effect in mice, which was reflected in significantly increased survival rates. Further, in some instances a therapeutic effect of CLDC administration up to 12h after WEEV challenge was observed. Mice treated with CLDC had significantly increased serum IFN-gamma, TNF-alpha, and IL-12, suggesting a strong Th1-biased antiviral activation of the innate immune system. In virus-infected animals, large increases in production of IFN-gamma, TNF-alpha, MCP-1, IL-12, and IL-10 in the brain were observed by 72h after infection, consistent with neuroinvasion and viral replication in the CNS. These results indicate that strong non-specific activation of innate immunity with an immune therapeutic such as CLDC is capable of eliciting significant protective immunity against a rapidly lethal strain of WEEV and suggest a possible prophylactic option for exposed individuals.
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Affiliation(s)
- Christopher H. Logue
- Division of Vector-Borne Infectious Diseases, Centers for Disease Control, Fort Collins, CO 80521, USA
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA
| | - Aaron T. Phillips
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA
| | - Eric C. Mossel
- Division of Vector-Borne Infectious Diseases, Centers for Disease Control, Fort Collins, CO 80521, USA
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA
| | - Jeremy P. Ledermann
- Division of Vector-Borne Infectious Diseases, Centers for Disease Control, Fort Collins, CO 80521, USA
| | - Thomas Welte
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA
| | - Steve W. Dow
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA
| | - Ken E. Olson
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA
| | - Ann M. Powers
- Division of Vector-Borne Infectious Diseases, Centers for Disease Control, Fort Collins, CO 80521, USA
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Mossel EC, Wang J, Jeffers S, Edeen KE, Wang S, Cosgrove GP, Funk CJ, Manzer R, Miura TA, Pearson LD, Holmes KV, Mason RJ. SARS-CoV replicates in primary human alveolar type II cell cultures but not in type I-like cells. Virology 2007; 372:127-35. [PMID: 18022664 PMCID: PMC2312501 DOI: 10.1016/j.virol.2007.09.045] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2007] [Revised: 08/03/2007] [Accepted: 09/28/2007] [Indexed: 02/07/2023]
Abstract
Severe acute respiratory syndrome (SARS) is a disease characterized by diffuse alveolar damage. We isolated human alveolar type II cells and maintained them in a highly differentiated state. Type II cell cultures supported SARS-CoV replication as evidenced by RT-PCR detection of viral subgenomic RNA and an increase in virus titer. Virus titers were maximal by 24 h and peaked at approximately 105 pfu/mL. Two cell types within the cultures were infected. One cell type was type II cells, which were positive for SP-A, SP-C, cytokeratin, a type II cell-specific monoclonal antibody, and Ep-CAM. The other cell type was composed of spindle-shaped cells that were positive for vimentin and collagen III and likely fibroblasts. Viral replication was not detected in type I-like cells or macrophages. Hence, differentiated adult human alveolar type II cells were infectible but alveolar type I-like cells and alveolar macrophages did not support productive infection.
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Affiliation(s)
- Eric C Mossel
- Colorado State University, Fort Collins, CO 80523, USA.
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Sainz B, Mossel EC, Gallaher WR, Wimley WC, Peters CJ, Wilson RB, Garry RF. Inhibition of severe acute respiratory syndrome-associated coronavirus (SARS-CoV) infectivity by peptides analogous to the viral spike protein. Virus Res 2006; 120:146-55. [PMID: 16616792 PMCID: PMC2582734 DOI: 10.1016/j.virusres.2006.03.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2005] [Revised: 02/09/2006] [Accepted: 03/01/2006] [Indexed: 11/22/2022]
Abstract
Severe acute respiratory syndrome-associated coronavirus (SARS-CoV) is the cause of an atypical pneumonia that affected Asia, North America and Europe in 2002-2003. The viral spike (S) glycoprotein is responsible for mediating receptor binding and membrane fusion. Recent studies have proposed that the carboxyl terminal portion (S2 subunit) of the S protein is a class I viral fusion protein. The Wimley and White interfacial hydrophobicity scale was used to identify regions within the CoV S2 subunit that may preferentially associate with lipid membranes with the premise that peptides analogous to these regions may function as inhibitors of viral infectivity. Five regions of high interfacial hydrophobicity spanning the length of the S2 subunit of SARS-CoV and murine hepatitis virus (MHV) were identified. Peptides analogous to regions of the N-terminus or the pre-transmembrane domain of the S2 subunit inhibited SARS-CoV plaque formation by 40-70% at concentrations of 15-30 microM. Interestingly, peptides analogous to the SARS-CoV or MHV loop region inhibited viral plaque formation by >80% at similar concentrations. The observed effects were dose-dependent (IC50 values of 2-4 microM) and not a result of peptide-mediated cell cytotoxicity. The antiviral activity of the CoV peptides tested provides an attractive basis for the development of new fusion peptide inhibitors corresponding to regions outside the fusion protein heptad repeat regions.
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Affiliation(s)
- Bruno Sainz
- Department of Microbiology and Immunology, Tulane University Health Sciences Center, New Orleans, LA 70112, USA.
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Mossel EC, Huang C, Narayanan K, Makino S, Tesh RB, Peters CJ. Exogenous ACE2 expression allows refractory cell lines to support severe acute respiratory syndrome coronavirus replication. J Virol 2005; 79:3846-50. [PMID: 15731278 PMCID: PMC1075706 DOI: 10.1128/jvi.79.6.3846-3850.2005] [Citation(s) in RCA: 119] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Of 30 cell lines and primary cells examined, productive severe acute respiratory syndrome coronavirus (Urbani strain) (SARS-CoV) infection after low-multiplicity inoculation was detected in only six: three African green monkey kidney epithelial cell lines (Vero, Vero E6, and MA104), a human colon epithelial line (CaCo-2), a porcine kidney epithelial line [PK(15)], and mink lung epithelial cells (Mv 1 Lu). SARS-CoV produced a lytic infection in Vero, Vero E6, and MA104 cells, but there was no visible cytopathic effect in Caco-2, Mv 1 Lu, or PK(15) cells. Multistep growth kinetics were identical in Vero E6 and MA104 cells, with maximum titer reached 24 h postinoculation (hpi). Virus titer was maximal 96 hpi in CaCo-2 cells, and virus was continually produced from infected CaCo-2 cells for at least 6 weeks after infection. CaCo-2 was the only human cell type of 13 tested that supported efficient SARS-CoV replication. Expression of the SARS-CoV receptor, angiotensin-converting enzyme 2 (ACE2), resulted in SARS-CoV replication in all refractory cell lines examined. Titers achieved were variable and dependent upon the method of ACE2 expression.
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Affiliation(s)
- Eric C Mossel
- Department of Microbiology, Immunology, and Pathology, Colorado State University, 1619 Campus Delivery, Fort Collins, CO 80523-1619, USA.
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Ito N, Mossel EC, Narayanan K, Popov VL, Huang C, Inoue T, Peters CJ, Makino S. Severe acute respiratory syndrome coronavirus 3a protein is a viral structural protein. J Virol 2005; 79:3182-6. [PMID: 15709039 PMCID: PMC548460 DOI: 10.1128/jvi.79.5.3182-3186.2005] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The present study showed the association of a severe acute respiratory syndrome coronavirus (SCoV) accessory protein, 3a, with plasma membrane and intracellular SCoV particles in infected cells. 3a protein appeared to undergo posttranslational modifications in infected cells and was incorporated into SCoV particles, establishing that 3a protein was a SCoV structural protein.
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Affiliation(s)
- Naoto Ito
- Department of Microbiology and Immunology, The University of Texas Medical Branch at Galveston, Galveston, TX 77555-1019, USA
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Sainz B, Mossel EC, Peters CJ, Garry RF. Interferon-beta and interferon-gamma synergistically inhibit the replication of severe acute respiratory syndrome-associated coronavirus (SARS-CoV). Virology 2004; 329:11-7. [PMID: 15476870 PMCID: PMC7111895 DOI: 10.1016/j.virol.2004.08.011] [Citation(s) in RCA: 141] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2004] [Revised: 08/04/2004] [Accepted: 08/13/2004] [Indexed: 01/11/2023]
Abstract
Recent studies have shown that interferon-gamma (IFN-γ) synergizes with IFN-α/β to inhibit the replication of both RNA and DNA viruses. We investigated the effects of IFNs on the replication of two strains of severe acute respiratory syndrome-associated coronavirus (SARS-CoV). While treatment of Vero E6 cells with 100 U/ml of either IFN-β or IFN-γ marginally reduced viral replication, treatment with both IFN-β and IFN-γ inhibited SARS-CoV plaque formation by 30-fold and replication by 3000-fold at 24 h and by > 1 × 105-fold at 48 and 72 h post-infection. These studies suggest that combination IFN treatment warrants further investigation as a treatment for SARS.
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Affiliation(s)
- Bruno Sainz
- Department of Microbiology and Immunology, Program in Molecular Pathogenesis and Immunity, Tulane University Health Sciences Center, New Orleans, LA 70112, USA
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Abstract
We used the neonatal mouse model of rotavirus infection and virus strains SA11-clone 4 (SA11-Cl4) and Rhesus rotavirus (RRV) to examine the mechanism of the extraintestinal spread of viruses following oral inoculation. The spread-competent viruses, RRV and reassortant R7, demonstrated a temporal progression from the intestine, to the terminal ileum, to the mesenteric lymph nodes (MLN), and to the peripheral tissues. SA11-Cl4 was not found outside the intestine. Reassortant virus S7, which was unable to reach the liver in previous studies (E. C. Mossel and R. F. Ramig, J. Virol. 76:6502-6509, 2002), was recovered from 60% of the MLN, suggesting that there are multiple determinants for the spread of virus from the intestine to the MLN. Phenotypic segregation analysis identified RRV genome segment 6 (VP6) as a secondary determinant of the spread of virus to the MLN (P = 0.02) in reassortant viruses containing segment 7 from the spread-incompetent parent. These data suggest that in the orally infected neonatal mouse, the extraintestinal spread of rotavirus occurs via a lymphatic pathway, and the spread phenotype is primarily determined by NSP3 and can be modified by VP6.
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Affiliation(s)
- Eric C Mossel
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas 77030, USA
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Mossel EC, Ramig RF. Rotavirus genome segment 7 (NSP3) is a determinant of extraintestinal spread in the neonatal mouse. J Virol 2002; 76:6502-9. [PMID: 12050363 PMCID: PMC136252 DOI: 10.1128/jvi.76.13.6502-6509.2002] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2002] [Accepted: 04/09/2002] [Indexed: 12/12/2022] Open
Abstract
We used the neonatal mouse model of rotavirus infection to study extraintestinal spread following oral inoculation. Five-day-old pups were inoculated with either SA11-Cl3, SA11-Cl4, SA11-4F, RRV, or B223. By using virus detection in the liver as a proxy determination for extraintestinal spread, rotavirus strains capable of extraintestinal spread at high frequency (rhesus rotavirus [RRV]) and very low frequency (SA11-Cl4) were identified. Both strains productively infected the gastrointestinal tract. Oral inoculation of mice with RRV/ SA11-Cl4 reassortants and determination of virus titers in the gut and liver revealed that the extraintestinal spread phenotype segregated with RRV genome segment 7 to a high level of significance (P = 10(-3)). RRV segment 7 also segregated with the growth of virus in the gut (P = 10(-5)). Although infection of the gut was clearly required for tropism to the liver, there was no correlation between virus titers in the gut and detection of virus in the liver. Five days after intraperitoneal administration to bypass the gut barrier to virus spread, RRV and SA11-Cl4 both were recovered in the liver. However, only RRV was found in the liver following subcutaneous inoculation, suggesting that this peripheral site presented a similar barrier to virus spread as the gut. Sequence analysis of segment 7 from parental RRV and SA11-Cl4 and selected reassortants showed that (i) amino acid differences were distributed throughout the coding sequences and not concentrated in any particular functional motif and (ii) parental sequence was preserved in reassortants. These data support the hypothesis that NSP3, coded for by genome segment 7, plays a significant role in viral growth in the gut and spread to peripheral sites. The mechanism of NSP3-mediated tropism is under investigation.
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Affiliation(s)
- Eric C Mossel
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
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