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Evans MV, Bhatnagar S, Drake JM, Murdock CC, Rice JL, Mukherjee S. The mismatch of narratives and local ecologies in the everyday governance of water access and mosquito control in an urbanizing community. Health Place 2023; 80:102989. [PMID: 36804681 DOI: 10.1016/j.healthplace.2023.102989] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 01/05/2023] [Accepted: 02/06/2023] [Indexed: 02/18/2023]
Abstract
Mosquito-borne disease presents a significant threat to urban populations, but risk can be uneven across a city due to underlying environmental patterns. Urban residents rely on social and economic processes to control the environment and mediate disease risk, a phenomenon known as everyday governance. We studied how households employed everyday governance of urban infrastructure relevant to mosquito-borne disease in Bengaluru, India to examine if and how inequalities in everyday governance manifest in differences in mosquito control. We found that governance mechanisms differed for water access and mosquitoes. Economic and social capital served different roles for each, influenced by global narratives of water and vector control.
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Affiliation(s)
- M V Evans
- MIVEGEC, Univ. Montpellier, CNRS, IRD, Montpellier, France; Odum School of Ecology, University of Georgia, Athens, GA, USA; Center for Ecology of Infectious Diseases, University of Georgia, Athens, GA, USA.
| | - S Bhatnagar
- Observatoire de Genève, Université de Genève, Sauverny, Switzerland; School of Arts and Sciences, Azim Premji University, Bengaluru, Karnataka, India
| | - J M Drake
- Odum School of Ecology, University of Georgia, Athens, GA, USA; Center for Ecology of Infectious Diseases, University of Georgia, Athens, GA, USA
| | - C C Murdock
- Odum School of Ecology, University of Georgia, Athens, GA, USA; Center for Ecology of Infectious Diseases, University of Georgia, Athens, GA, USA; Department of Entomology, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY, USA; Cornell Institute of Host-Microbe Interactions and Disease, Cornell University, Ithaca, NY, USA; Northeast Regional Center for Excellence in Vector-borne Diseases, Cornell University, Ithaca, NY, USA
| | - J L Rice
- Department of Geography, University of Georgia, Athens, GA, USA
| | - S Mukherjee
- School of Arts and Sciences, Azim Premji University, Bengaluru, Karnataka, India; Biological and Life Sciences Division, School of Arts and Sciences, Ahmedabad University, Ahmedabad, Gujarat, India
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Valentine MJ, Ciraola B, Aliota MT, Vandenplas M, Marchi S, Tenebray B, Leparc-Goffart I, Gallagher CA, Beierschmitt A, Corey T, Dore KM, de Lamballerie X, Wang C, Murdock CC, Kelly PJ. No evidence for sylvatic cycles of chikungunya, dengue and Zika viruses in African green monkeys (Chlorocebus aethiops sabaeus) on St. Kitts, West Indies. Parasit Vectors 2020; 13:540. [PMID: 33126907 PMCID: PMC7598228 DOI: 10.1186/s13071-020-04419-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 07/18/2020] [Accepted: 10/21/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dengue, chikungunya and Zika viruses (DENV, CHIKV and ZIKV) are transmitted in sylvatic transmission cycles between non-human primates and forest (sylvan) mosquitoes in Africa and Asia. It remains unclear if sylvatic cycles exist or could establish themselves elsewhere and contribute to the epidemiology of these diseases. The Caribbean island of St. Kitts has a large African green monkey (AGM) (Chlorocebus aethiops sabaeus) population and is therefore ideally suited to investigate sylvatic cycles. METHODS We tested 858 AGM sera by ELISA and PRNT for virus-specific antibodies and collected and identified 9704 potential arbovirus vector mosquitoes. Mosquitoes were homogenized in 513 pools for testing by viral isolation in cell culture and by multiplex RT-qPCR after RNA extraction to detect the presence of DENV, CHIKV and ZIKVs. DNA was extracted from 122 visibly blood-fed individual mosquitoes and a polymorphic region of the hydroxymethylbilane synthase gene (HMBS) was amplified by PCR to determine if mosquitoes had fed on AGMs or humans. RESULTS All of the AGMs were negative for DENV, CHIKV or ZIKV antibodies. However, one AGM did have evidence of an undifferentiated Flavivirus infection. Similarly, DENV, CHIKV and ZIKV were not detected in any of the mosquito pools by PCR or culture. AGMs were not the source of any of the mosquito blood meals. CONCLUSION Sylvatic cycles involving AGMs and DENV, CHIKV and ZIKV do not currently exist on St. Kitts.
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Affiliation(s)
- Matthew John Valentine
- One Health Centre for Zoonoses and Tropical Veterinary Medicine, Ross University School of Veterinary Medicine, West Farm, Basseterre, St. Kitts and Nevis
| | - Brenda Ciraola
- One Health Centre for Zoonoses and Tropical Veterinary Medicine, Ross University School of Veterinary Medicine, West Farm, Basseterre, St. Kitts and Nevis
| | | | - Michel Vandenplas
- Department of Biomedical Sciences, Ross University School of Veterinary Medicine, West Farm, Basseterre, St. Kitts and Nevis
| | - Silvia Marchi
- Department of Biomedical Sciences, Ross University School of Veterinary Medicine, West Farm, Basseterre, St. Kitts and Nevis
| | - Bernard Tenebray
- National Reference Laboratory for Arboviruses, Institut de Recherche Biomédicale des Armées, Marseille, France
- Unité des Virus Emergents (UVE), Aix Marseille Université, IRD 190, INSERM 1207, IHU Méditerranée Infection, Marseille, France
| | - Isabelle Leparc-Goffart
- National Reference Laboratory for Arboviruses, Institut de Recherche Biomédicale des Armées, Marseille, France
- Unité des Virus Emergents (UVE), Aix Marseille Université, IRD 190, INSERM 1207, IHU Méditerranée Infection, Marseille, France
| | - Christa Ann Gallagher
- Center for Conservation Medicine and Ecosystem Health, Ross University School of Veterinary Medicine, West Farm, Basseterre, St. Kitts and Nevis
| | - Amy Beierschmitt
- Department of Biomedical Sciences, Ross University School of Veterinary Medicine, West Farm, Basseterre, St. Kitts and Nevis
- Behavioral Science Foundation, Estridge Estate, Basseterre, St. Kitts and Nevis
| | - Tatiana Corey
- St. Kitts Biomedical Research Foundation, Bourryeau Estate, Christ Church Nichola Town, St. Kitts and Nevis
- Virscio, Inc, New Haven, CT USA
| | | | - Xavier de Lamballerie
- Unité des Virus Emergents (UVE), Aix Marseille Université, IRD 190, INSERM 1207, IHU Méditerranée Infection, Marseille, France
| | - Chengming Wang
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL USA
| | - Courtney Cuin Murdock
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA USA
- Odum School of Ecology, University of Georgia, Athens, GA USA
- Department of Entomology, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY USA
- Center for Tropical Emerging and Global Diseases, University of Georgia, Athens, GA USA
- Center for Ecology of Infectious Diseases, Odum School of Ecology, University of Georgia, Athens, GA USA
- Center for Vaccines and Immunology, College of Veterinary Medicine, University of Georgia, Athens, GA USA
| | - Patrick John Kelly
- Department of Clinical Sciences, Ross University School of Veterinary Medicine, West Farm, Basseterre, St. Kitts and Nevis
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Miazgowicz KL, Shocket MS, Ryan SJ, Villena OC, Hall RJ, Owen J, Adanlawo T, Balaji K, Johnson LR, Mordecai EA, Murdock CC. Age influences the thermal suitability of Plasmodium falciparum transmission in the Asian malaria vector Anopheles stephensi. Proc Biol Sci 2020; 287:20201093. [PMID: 32693720 PMCID: PMC7423674 DOI: 10.1098/rspb.2020.1093] [Citation(s) in RCA: 12] [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] [Indexed: 12/27/2022] Open
Abstract
Models predicting disease transmission are vital tools for long-term planning of malaria reduction efforts, particularly for mitigating impacts of climate change. We compared temperature-dependent malaria transmission models when mosquito life-history traits were estimated from a truncated portion of the lifespan (a common practice) versus traits measured across the full lifespan. We conducted an experiment on adult female Anopheles stephensi, the Asian urban malaria mosquito, to generate daily per capita values for mortality, egg production and biting rate at six constant temperatures. Both temperature and age significantly affected trait values. Further, we found quantitative and qualitative differences between temperature-trait relationships estimated from truncated data versus observed lifetime values. Incorporating these temperature-trait relationships into an expression governing the thermal suitability of transmission, relative R0(T), resulted in minor differences in the breadth of suitable temperatures for Plasmodium falciparum transmission between the two models constructed from only An. stephensi trait data. However, we found a substantial increase in thermal niche breadth compared with a previously published model consisting of trait data from multiple Anopheles mosquito species. Overall, this work highlights the importance of considering how mosquito trait values vary with mosquito age and mosquito species when generating temperature-based suitability predictions of transmission.
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Affiliation(s)
- K L Miazgowicz
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA.,Center for Tropical and Emerging Global Diseases, University of Georgia, Athens, GA, USA.,Center of Ecology of Infectious Diseases, University of Georgia, Athens, GA, USA
| | - M S Shocket
- Biology Department, Stanford University, Stanford, CA, USA.,Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, USA
| | - S J Ryan
- Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography, University of Florida, Gainesville, FL, USA.,Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA.,School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - O C Villena
- Computational Modeling and Data Analytics, Department of Statistics, Virginia Tech, Blacksburg, VA, USA
| | - R J Hall
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA.,Center of Ecology of Infectious Diseases, University of Georgia, Athens, GA, USA.,Odum School of Ecology, University of Georgia, Athens, GA, USA
| | - J Owen
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - T Adanlawo
- Odum School of Ecology, University of Georgia, Athens, GA, USA
| | - K Balaji
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - L R Johnson
- Computational Modeling and Data Analytics, Department of Statistics, Virginia Tech, Blacksburg, VA, USA
| | - E A Mordecai
- Biology Department, Stanford University, Stanford, CA, USA
| | - C C Murdock
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA.,Center for Tropical and Emerging Global Diseases, University of Georgia, Athens, GA, USA.,Center of Ecology of Infectious Diseases, University of Georgia, Athens, GA, USA.,Odum School of Ecology, University of Georgia, Athens, GA, USA.,Center for Vaccines and Immunology, University of Georgia, Athens, GA, USA.,River Basin Center, University of Georgia, Athens, GA, USA.,Department of Entomology, Cornell University, Ithaca, NY, USA
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Murdock CC, Sternberg ED, Thomas MB. Malaria transmission potential could be reduced with current and future climate change. Sci Rep 2016; 6:27771. [PMID: 27324146 PMCID: PMC4914975 DOI: 10.1038/srep27771] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [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: 11/26/2015] [Accepted: 05/24/2016] [Indexed: 12/30/2022] Open
Abstract
Several studies suggest the potential for climate change to increase malaria incidence in cooler, marginal transmission environments. However, the effect of increasing temperature in warmer regions where conditions currently support endemic transmission has received less attention. We investigate how increases in temperature from optimal conditions (27 °C to 30 °C and 33 °C) interact with realistic diurnal temperature ranges (DTR: ± 0 °C, 3 °C, and 4.5 °C) to affect the ability of key vector species from Africa and Asia (Anopheles gambiae and An. stephensi) to transmit the human malaria parasite, Plasmodium falciparum. The effects of increasing temperature and DTR on parasite prevalence, parasite intensity, and mosquito mortality decreased overall vectorial capacity for both mosquito species. Increases of 3 °C from 27 °C reduced vectorial capacity by 51–89% depending on species and DTR, with increases in DTR alone potentially halving transmission. At 33 °C, transmission potential was further reduced for An. stephensi and blocked completely in An. gambiae. These results suggest that small shifts in temperature could play a substantial role in malaria transmission dynamics, yet few empirical or modeling studies consider such effects. They further suggest that rather than increase risk, current and future warming could reduce transmission potential in existing high transmission settings.
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Affiliation(s)
- C C Murdock
- Department of Infectious Diseases, College of Veterinary Medicine, Odum School of Ecology, University of Georgia, 260 Veterinary Medicine, 501 D.W. Brookes Drive, Athens GA 30602, USA.,Center for Infectious Disease Dynamics, Department of Entomology, Pennsylvania State University, Merkle Lab, Orchard Road, University Park, PA 16802, USA
| | - E D Sternberg
- Center for Infectious Disease Dynamics, Department of Entomology, Pennsylvania State University, Merkle Lab, Orchard Road, University Park, PA 16802, USA
| | - M B Thomas
- Center for Infectious Disease Dynamics, Department of Entomology, Pennsylvania State University, Merkle Lab, Orchard Road, University Park, PA 16802, USA
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Abstract
Over the last 20 years, ecological immunology has provided much insight into how environmental factors shape host immunity and host–parasite interactions. Currently, the application of this thinking to the study of mosquito immunology has been limited. Mechanistic investigations are nearly always conducted under one set of conditions, yet vectors and parasites associate in a variable world. We highlight how environmental temperature shapes cellular and humoral immune responses (melanization, phagocytosis and transcription of immune genes) in the malaria vector, Anopheles stephensi. Nitric oxide synthase expression peaked at 30°C, cecropin expression showed no main effect of temperature and humoral melanization, and phagocytosis and defensin expression peaked around 18°C. Further, immune responses did not simply scale with temperature, but showed complex interactions between temperature, time and nature of immune challenge. Thus, immune patterns observed under one set of conditions provide little basis for predicting patterns under even marginally different conditions. These quantitative and qualitative effects of temperature have largely been overlooked in vector biology but have significant implications for extrapolating natural/transgenic resistance mechanisms from laboratory to field and for the efficacy of various vector control tools.
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Affiliation(s)
- C C Murdock
- Department of Entomology, Center for Infectious Disease Dynamics, Merkle Lab, University Park, PA 16802, USA.
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Murdock CC, Olival KJ, Perkins SL. Molecular identification of host feeding patterns of snow-melt mosquitoes (Diptera: Culicidae): potential implications for the transmission ecology of Jamestown Canyon virus. J Med Entomol 2010; 47:226-229. [PMID: 20380304 DOI: 10.1603/me09137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We collected blood-fed, snow-melt mosquitoes (Culicidae: Culiseta and Aedes) to describe the feeding patterns of potential mosquito vectors of Jamestown Canyon virus (JCV, Bunyaviridae: Orthobunyavirus). JCV is an arthropod-borne, zoonotic virus with deer as the primary amplifying host in western alpine ecosystems. We collected mosquitoes from natural resting areas, fiber pots, and carbon-dioxide baited miniature light traps in the Colorado Rocky Mountains in 2007. We conducted two polymerase chain reactions to amplify and sequence vertebrate DNA extracted from blood-fed mosquitoes, which yielded comparable, but not identical, results. Mammal-specific primers found mule deer (Odocoileus hemionus) and elk (Cervus elaphus canadensis) as the source of all bloodmeals. To determine if unamplified bloodmeals were from nonmammalian sources, we screened all samples with conserved vertebrate primers, which confirmed the initial polymerase chain reaction results, but also found porcupine (Erethizon dorsatum) and human (Homo sapiens) as additional bloodmeal sources. We consistently found that mule deer were the primary hosts for mosquitoes in this system. These results suggest that snow-melt mosquitoes, in particular A. cataphylla, may be important vectors in western JCV alpine systems and may also act as a bridge vector for JCV from cervid virus reservoirs to humans.
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Affiliation(s)
- C C Murdock
- School of Natural Resources and Program in the Environment, University of Michigan, 440 Church Street, Ann Arbor, MI 48109-1041, USA.
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