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Khwanket N, Tainchum K, Chareonviriyaphap T, Ngoen-Klan R, Noosidum A. Preferences for livestock bedding as a development substrate of the stable fly, Stomoxys calcitrans L. (Diptera: Muscidae), and potential application of entomopathogenic nematodes for controlling stable fly larvae. MEDICAL AND VETERINARY ENTOMOLOGY 2024. [PMID: 38783532 DOI: 10.1111/mve.12731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 05/12/2024] [Indexed: 05/25/2024]
Abstract
The stable fly, Stomoxys calcitrans L. (Diptera: Muscidae), is a significant insect pest with global veterinary implications due to its capacity to both cause nuisance and transmit disease-causing pathogens to livestock. This study aimed to determine the livestock bedding preferred for use as a development substrate by S. calcitrans larvae and field-collected adults. The result showed that S. calcitrans larvae exhibited a preference (26.7%) for 7-day-old cow manure. Gravid females displayed a pronounced preference (55.0%) for fresh cow manure. As there were eight choices, indifference would result in 12.5% for each bedding substrate. Furthermore, the efficacy of four entomopathogenic nematodes (EPNs), namely Heterorhabditis bacteriophora (Poinar), Heterorhabditis indica Poinar, Karunakar & David (Rhabditida: Heterorhabditidae), Steinernema siamkayai Poinar, Karunakar & David and Steinernema carpocapsae (Weiser) (Rhabditida: Steinernematidae), against S. calcitrans larvae and the persistence after application to livestock bedding substrates were evaluated under laboratory conditions. In filter paper bioassays, all four EPNs caused 76.7%-100.0% mortality in the second instar larvae of S. calcitrans when applied at 50 and 100 infective juveniles (IJs)/cm2 within 5 days after exposure. For the third instar larvae of S. calcitrans, only H. indica induced high mortalities of 86.6% when applied at 100 IJs/cm2 within 5 days after exposure, while the other EPNs resulted in mortalities of less than 70%. The data further demonstrated that H. bacteriophora, H. indica and S. siamkayai remained present in the substrates linked to S. calcitrans larvae for as long as 7 days after the application of EPNs. This study demonstrates the potential of EPNs as a biologically based control agent against larvae of S. calcitrans, a serious pest and significant vector for various livestock animals.
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Affiliation(s)
- Niyaporn Khwanket
- Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand
- Agricultural Innovation and Management Division, Faculty of Natural Resources, Prince of Songkla University, Songkhla, Thailand
| | - Krajana Tainchum
- Agricultural Innovation and Management Division, Faculty of Natural Resources, Prince of Songkla University, Songkhla, Thailand
| | | | - Ratchadawan Ngoen-Klan
- Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand
| | - Atirach Noosidum
- Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand
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Heller LM, Bastos TDSA, Zapa DMB, de Morais IML, Salvador VF, Leal LLLL, Couto LFM, Neves LC, de Freitas Paula WV, Ferreira LL, de Barros ATM, Cançado PHD, Machado RZ, Soares VE, Cadioli FA, da Silva Krawczak F, Zanetti Lopes WD. Evaluation of mechanical transmission of Trypanosoma vivax by Stomoxys calcitrans in a region without a cyclic vector. Parasitol Res 2024; 123:96. [PMID: 38224369 DOI: 10.1007/s00436-023-08102-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 12/19/2023] [Indexed: 01/16/2024]
Abstract
This work investigated the mechanical transmission of Trypanosoma vivax by Stomoxys calcitrans to cattle in a region without a cyclic vector. The study involved two experiments, one with calves experimentally infected with T. vivax, in the acute phase of trypanosomosis (Experiment 1) and the other in the chronic phase (Experiment 2). In both experiments, two transmission methods were used with flies that had not fed for 24 h or had never fed: (i) Method 1: flies released freely in cattle pens (≈3,300 flies/pen for 10 days); and (ii) Method 2: flies placed in a feeding chamber (12 flies/animal). To develop Method 1 in the two experiments (acute and chronic phases), T. vivax-positive animals were kept with T. vivax-negative animals. Periodically, the Brener method, Woo method, blood smears, cPCR, ELISA, IFAT, and Imunoteste® were performed to detect T. vivax in the animals. We also recorded the animals' head tossing and hoof stomping and the number of flies near the pens' inner walls. Subsequently, biological testing was performed using lambs. For Method 2 in both experiments, flies inside the feeding chamber first fed on T. vivax-positive animals and later on negative animals. In both experiments and methods, we examined the flies for the presence of T. vivax through blood smears and cPCR of the proboscis and abdomen. In Experiment 2 (chronic phase), a test was conducted to determine how long trypomastigotes forms could survive on the blood of animals with different levels of parasitemia. None of the animals (calves and lambs) became infected with T. vivax or showed antibodies against it. During the evaluation period, the animals in the presence of the flies exhibited more hoof stomping and head tossing compared to those without flies (control). Additionally, there was an increase in the number of flies in the pens during the experiment. Only in Experiment 1 (acute phase) were T. vivax trypomastigotes and DNA found in the abdomen of the flies but not in the proboscis. In Experiment 2 (chronic phase), higher concentrations of trypomastigotes per milliliter of blood were associated with a shorter the lifespan of this stage of the parasite. In conclusion, under the variable conditions of the experiments (hosts, number of flies, and level of parasitemia), S. calcitrans was unable to mechanically transmit T. vivax to cattle.
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Affiliation(s)
- Luciana Maffini Heller
- Centro de Parasitologia Veterinária, Escola de Veterinária E Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Thiago de Souza Azeredo Bastos
- Centro de Parasitologia Veterinária, Escola de Veterinária E Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
- Faculdade Anhanguera, Anápolis, Goiás, Brasil
| | - Dina María Beltrán Zapa
- Centro de Parasitologia Veterinária, Escola de Veterinária E Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Igor Maciel Lopes de Morais
- Centro de Parasitologia Veterinária, Escola de Veterinária E Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Vanessa Ferreira Salvador
- Centro de Parasitologia Veterinária, Escola de Veterinária E Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Luccas Lourenzzo Lima Lins Leal
- Centro de Parasitologia Veterinária, Escola de Veterinária E Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Luiz Fellipe Monteiro Couto
- Centro de Parasitologia Veterinária, Escola de Veterinária E Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Lucianne Cardoso Neves
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária E Zootecnia, Universidade Federal de Goiás, Goiânia, Brazil
| | - Warley Vieira de Freitas Paula
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária E Zootecnia, Universidade Federal de Goiás, Goiânia, Brazil
| | - Lorena Lopes Ferreira
- Departamento de Medicina Veterinária, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | | | - Rosangela Zacarias Machado
- Departamento de Patologia Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, São Paulo, Brazil
| | | | - Fabiano Antonio Cadioli
- Departamento de Clínica, Cirurgia E Reprodução Animal, Faculdade de Medicina Veterinária, Universidade Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Felipe da Silva Krawczak
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária E Zootecnia, Universidade Federal de Goiás, Goiânia, Brazil
| | - Welber Daniel Zanetti Lopes
- Centro de Parasitologia Veterinária, Escola de Veterinária E Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
- Departamento de Biociências E Tecnologia, Instituto de Patologia Tropical E Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
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Schwarz L, Hamar F, Bernreiter-Hofer T, Loncaric I, Arnold M, Voglmayr T, Ladinig A. Bleeding skin lesions in gestating sows of a piglet producing farm in Austria. Porcine Health Manag 2023; 9:52. [PMID: 37964382 PMCID: PMC10647148 DOI: 10.1186/s40813-023-00348-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 11/04/2023] [Indexed: 11/16/2023] Open
Abstract
BACKGROUND Stomoxys calcitrans, the stable fly, occurs in pig producing countries worldwide. While in cattle the impact of this blood sucking insect is quite well described, its role in pig production is poorly investigated. Here we describe a case of a massive stable fly overpopulation in the gestation unit of a piglet producing farm in Austria that resulted in bleeding skin lesions in bitten sows. CASE PRESENTATION In October 2021, the responsible herd veterinarian of the case farm reported of sows in the gestation area presenting with bloody crusts on the whole skin surface of the body and of bleeding skin lesions. 33/55 sows were affected by moderate to severe skin lesions. Reproductive performance decreased during the time of massive stable fly overpopulation. Sows in the gestation unit showed defensive behaviour and at a certain time point resigned and accepted being bitten by stable flies. After controlling the fly population, reproductive performance improved and even exceeded the performance before the massive overgrowth of the stable fly population. CONCLUSIONS Stable flies are a serious harm to pigs and should be kept in mind for improved animal health and welfare. Knowledge about the determination of Stomoxys calcitrans and early recognition of an increasing stable fly population in pig farming systems followed by proper insect control measures have to be performed to reduce losses caused by this harming insect.
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Affiliation(s)
- Lukas Schwarz
- University Clinic for Swine, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, Vienna, Austria.
| | - Flora Hamar
- University Clinic for Swine, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Tanja Bernreiter-Hofer
- University Clinic for Swine, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, Vienna, Austria
- Tierarztpraxis an der Nordbahn, Strasshof, Austria
| | - Igor Loncaric
- Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Mirjam Arnold
- Clinic for Swine, Department for Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Institute for Animal Health I, Bavarian Health and Food Safety Authority, Oberschleißheim, Germany
| | | | - Andrea Ladinig
- University Clinic for Swine, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, Vienna, Austria
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Pascacio-Villafán C, Cohen AC. How Rearing Systems for Various Species of Flies Benefit Humanity. INSECTS 2023; 14:553. [PMID: 37367369 DOI: 10.3390/insects14060553] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/02/2023] [Accepted: 06/09/2023] [Indexed: 06/28/2023]
Abstract
Flies (Diptera) have played a prominent role in human history, and several fly species are reared at different scales and for different beneficial purposes worldwide. Here, we review the historical importance of fly rearing as a foundation for insect rearing science and technology and synthesize information on the uses and rearing diets of more than 50 fly species in the families Asilidae, Calliphoridae, Coelopidae, Drosophilidae, Ephydridae, Muscidae, Sarcophagidae, Stratiomyidae, Syrphidae, Tachinidae, Tephritidae, and Tipulidae. We report more than 10 uses and applications of reared flies to the well-being and progress of humanity. We focus on the fields of animal feed and human food products, pest control and pollination services, medical wound therapy treatments, criminal investigations, and on the development of several branches of biology using flies as model organisms. We highlight the relevance of laboratory-reared Drosophila melanogaster Meigen as a vehicle of great scientific discoveries that have shaped our understanding of many biological systems, including the genetic basis of heredity and of terrible diseases such as cancer. We point out key areas of fly-rearing research such as nutrition, physiology, anatomy/morphology, genetics, genetic pest management, cryopreservation, and ecology. We conclude that fly rearing is an activity with great benefits for human well-being and should be promoted for future advancement in diverse and innovative methods of improving existing and emerging problems to humanity.
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Affiliation(s)
- Carlos Pascacio-Villafán
- Red de Manejo Biorracional de Plagas y Vectores, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Xalapa 91073, Veracruz, Mexico
| | - Allen Carson Cohen
- Insect Rearing Education and Research, Department of Entomology & Plant Pathology, NC State University, Raleigh, NC 27695, USA
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Weluwanarak T, Changbunjong T, Leesombun A, Boonmasawai S, Sungpradit S. Effects of Piper nigrum L. Fruit Essential Oil Toxicity against Stable Fly (Diptera: Muscidae). PLANTS (BASEL, SWITZERLAND) 2023; 12:1043. [PMID: 36903904 PMCID: PMC10005248 DOI: 10.3390/plants12051043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/15/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
The efficacy of Piper nigrum L. fruit essential oil (EO) against Stomoxys calcitrans (stable fly), a blood-feeding fly distributed worldwide, was investigated. This study aimed to evaluate the insecticidal activity of EO based on contact and fumigant toxicity tests. Chemical analysis of the EO using gas chromatography-mass spectrometry revealed that sabinene (24.41%), limonene (23.80%), β-caryophyllene (18.52%), and α-pinene (10.59%) were the major components. The results demonstrated that fly mortality increased with increasing EO concentration and time during the first 24 h of exposure. The median lethal dose was 78.37 µg/fly for contact toxicity, while the 90% lethal dose was 556.28 µg/fly. The median lethal concentration during fumigant toxicity testing was 13.72 mg/L air, and the 90% lethal concentration was 45.63 mg/L air. Our findings suggested that essential oil extracted from P. nigrum fruit could be a potential natural insecticidal agent for control of stable fly. To examine the insecticidal properties of P. nigrum fruit EO, further field trials and investigation into the efficacy of nano-formulations are required.
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Affiliation(s)
- Thekhawet Weluwanarak
- The Monitoring and Surveillance Center for Zoonotic Diseases in Wildlife and Exotic Animals (MoZWE), Faculty of Veterinary Science, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Tanasak Changbunjong
- The Monitoring and Surveillance Center for Zoonotic Diseases in Wildlife and Exotic Animals (MoZWE), Faculty of Veterinary Science, Mahidol University, Nakhon Pathom 73170, Thailand
- Department of Pre-Clinic and Applied Animal Science, Faculty of Veterinary Science, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Arpron Leesombun
- Department of Pre-Clinic and Applied Animal Science, Faculty of Veterinary Science, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Sookruetai Boonmasawai
- Department of Pre-Clinic and Applied Animal Science, Faculty of Veterinary Science, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Sivapong Sungpradit
- Department of Pre-Clinic and Applied Animal Science, Faculty of Veterinary Science, Mahidol University, Nakhon Pathom 73170, Thailand
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Desquesnes M, Thaisungnoen K, Chalermwong P, Nevot A, Fossaert C, Lucas A, Onju S, Boonsaen P, Jittapalapong S. The Use of “Tail-Pedometers” to Evaluate the Impact of Dipterans in Feeder Cattle. INSECTS 2022; 13:insects13070616. [PMID: 35886792 PMCID: PMC9320480 DOI: 10.3390/insects13070616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 11/05/2022]
Abstract
Simple Summary Hematophagous flies are a pest for livestock due to their bites, annoyance and the diseases they transmit. Cattle exposed to biting flies exhibit defence movements such as tail flicks. The evaluation of biting fly density and annoyance by counting tail flicks of cattle has been validated in the past, but it is highly time consuming. In this study, we evaluated the use of sport pedometers attached to the tails of feeder cattle, in order to evaluate tails flick frequency in two groups of six feeder cattle: Group A was protected by a mosquito net, and Group B was in open-air. Tail flicks were also recorded visually. In addition, insect density was evaluated using three fly traps in the surrounding of Group B. A strong correlation was observed between fly density and visual records of tail flicks; a stronger correlation was found between fly density and tail pedometer records. The reports of tail flicks at night were even able to draw attention to a huge infestation by mosquitoes. Finally, in these experimental conditions, tail pedometers proved to be useful tools in evaluating density and the impact of dipterans on cattle behaviour. They will be useful tools to evaluate new biting fly control methods. Abstract Hematophagous flies are a pest for livestock; their direct impact reduces productivity, and they are vectors of parasites, bacteria and viruses. Their control using insecticides is inefficient and highly polluting. The validation of new control tools requires efficacy and cost-effectiveness evaluation. The quantification of hematophagous insects’ impact in livestock is a challenging prerequisite. Tail flicks counts can reliably evaluate fly-burden; however, visual records are tedious and time-consuming. In the present study, automation of tail flick counts was made through the use of pedometers attached to the tail, in two groups of feeder cattle. Group A was kept in a pen under the protection of a mosquito net, and Group B was kept in an open-air pen. The fly density of Group B was evaluated using fly traps. The apparent density per trap ranged from 130 to 1700 in the study. The mean pedometer records per 24 h ranged from 957+/−58 bits in Group A to 11,138+/−705 bits in Group B. The night/day records observed in Group A (200/800 bits) were drastically increased in Group B (1000–4000/4000–14,000 bits) and variable along seasons. A very high correlation was observed between fly density and visual records or pedometer records (PR). Two-hour PRs proved to be a reliable predictive tool for fly density. Moreover, the pedometers revealed an unsuspected but significant nuisance of mosquitoes, which should be thoroughly investigated.
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Affiliation(s)
- Marc Desquesnes
- CIRAD, UMR InterTryp, ENVT, 23 Chemin des Capelles, 31300 Toulouse, France
- InterTryp, Univ Montpellier, CIRAD, IRD, F-34398 Montpellier, France; (A.N.); (C.F.); (A.L.)
- Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand; (K.T.); (P.C.)
- Correspondence:
| | - Kornkanok Thaisungnoen
- Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand; (K.T.); (P.C.)
| | - Piangjai Chalermwong
- Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand; (K.T.); (P.C.)
| | - Adèle Nevot
- InterTryp, Univ Montpellier, CIRAD, IRD, F-34398 Montpellier, France; (A.N.); (C.F.); (A.L.)
- Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand; (K.T.); (P.C.)
| | - Clément Fossaert
- InterTryp, Univ Montpellier, CIRAD, IRD, F-34398 Montpellier, France; (A.N.); (C.F.); (A.L.)
- Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand; (K.T.); (P.C.)
| | - Antoine Lucas
- InterTryp, Univ Montpellier, CIRAD, IRD, F-34398 Montpellier, France; (A.N.); (C.F.); (A.L.)
- Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand; (K.T.); (P.C.)
| | - Sathaporn Onju
- Department of Entomology, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen 73140, Thailand;
| | - Phoompong Boonsaen
- Department of Animal Sciences, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen 73140, Thailand;
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Makhahlela NB, Liebenberg D, Van Hamburg H, Taioe MO, Onyiche T, Ramatla T, Thekisoe OM. Detection of pathogens of veterinary importance harboured by Stomoxys calcitrans in South African feedlots. SCIENTIFIC AFRICAN 2022. [DOI: 10.1016/j.sciaf.2022.e01112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Paliy AP, Mashkey AN, Faly LI, Kysterna OS, Rebenko HI, Palii AP. Ecology of zoophilic flies in livestock biocenoses of Ukraine. BIOSYSTEMS DIVERSITY 2021. [DOI: 10.15421/012132] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
In modern animal husbandry of Ukraine, there are still some unresolved issues related to the high number of zoophilic flies in the territories of facilities and the spread of animal infectious and parasitic diseases. A detailed study of bioecological peculiarities of the dominant zoophilic fly species contributes to improving the effectiveness of measures to control ectoparasites. 27 zoophilic fly species have been found in animal breeding complexes. The maximum number of parasitic Diptera species was recorded on cattle-keeping premises. The biological properties of Neomyia cornicina (Fabricius, 1781) (size, shape, colour, duration of preimaginal phase development) were studied. Also, we studied the dynamics of the number and daily activity of dominant fly species (Musca domestica Linnaeus, 1758, M. autumnalis De Geer, 1776, Stomoxys calcitrans (Linnaeus, 1758)). When studying the intraspecies competition, a high-degree survival of M. domestica and M. autumnalis was determined in the conditions of critical nutritional deficiency (0.5 g of nutrient medium per larva) and increased density of individuals (the imago emergence was 38.6% and 34.0%, respectively). In similar maintenance conditions, the emergence of N. cornicina imago was low (14.6%). With a two-fold increase in the insectarium volume and in the amount of nutrient medium (1 g per larva), the imago emergence of M. domestica, M. autumnalis and N. cornicina increased to 64.0%, 39.2%, and 24.0%, respectively. With an even greater increase in the amount of nutrient medium (2 g per larva), the maximum emergence of imagoes of all the studied fly species was observed (M. domestica, M. autumnalis, and N. cornicina: 96.6%, 91.2% and 72.6%, respectively). In the conditions of interspecific competition, M. autumnalis suppressed N. cornicina even in conditions of a sufficient amount of nutrient substrate. In the competition between M. domestica and M. autumnalis, house fly dominated. Increasing the nutrient medium volume narrowed the gap between the competing species.
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Tielemans E, Aouiche N, Saunders A, Besselaar J, Beugnet F. Insecticidal efficacy of afoxolaner against Stomoxys calcitrans (Diptera: Muscidae) in dogs. CURRENT RESEARCH IN PARASITOLOGY & VECTOR-BORNE DISEASES 2021; 1:100043. [PMID: 35284852 PMCID: PMC8906105 DOI: 10.1016/j.crpvbd.2021.100043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/12/2021] [Accepted: 07/15/2021] [Indexed: 06/14/2023]
Abstract
The insecticidal activity of oral afoxolaner (NexGard®) against stable flies Stomoxys calcitrans (Diptera: Muscidae) that had fed on dogs was evaluated in a blinded, randomised, and negative controlled efficacy study. The efficacy assessments were based on survival rates of fed flies after challenges to treated dogs. For a challenge, each dog was exposed to 50 unfed S. calcitrans for 30 minutes, after which time live fed flies were collected and incubated in an insectarium for viability assessment after 48, 72 and 96 hours. Fourteen dogs were randomly allocated to an untreated control group and an afoxolaner-treated group of seven dogs each. NexGard® was administered on Day 0 per label instructions to the treated group. All dogs were challenged on Days 1, 7, 14, 21 and 28. Efficacy was calculated by comparison of the proportion of incubated live fed flies for each individual after their related 30-min challenges in the control and treated groups after 48, 72 and 96 hours of incubation. A significant afoxolaner activity against S. calcitrans was demonstrated, with efficacy at 96 hours after blood-feeding ranging from 76.4 to 98.5% through Day 28.
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Affiliation(s)
- Eric Tielemans
- Boehringer Ingelheim Animal Health, 29 Avenue Tony Garnier, 69007 Lyon, France
| | - Nesrine Aouiche
- Boehringer Ingelheim Animal Health, 29 Avenue Tony Garnier, 69007 Lyon, France
| | - Adriaan Saunders
- Clinvet International (Pty) Ltd, PO Box 11186, 9321 Universitas, South Africa
| | - J.F. Besselaar
- Clindata International (Pty) Ltd, PO Box 11186, 9321 Universitas, South Africa
| | - Frédéric Beugnet
- Boehringer Ingelheim Animal Health, 29 Avenue Tony Garnier, 69007 Lyon, France
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Quantifying and Modeling the Acquisition and Retention of Lumpy Skin Disease Virus by Hematophagus Insects Reveals Clinically but Not Subclinically Affected Cattle Are Promoters of Viral Transmission and Key Targets for Control of Disease Outbreaks. J Virol 2021; 95:JVI.02239-20. [PMID: 33568514 PMCID: PMC8104101 DOI: 10.1128/jvi.02239-20] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 02/02/2021] [Indexed: 12/21/2022] Open
Abstract
Lumpy skin disease virus (LSDV) causes a severe systemic disease characterized by cutaneous nodules in cattle. LSDV is a rapidly emerging pathogen, having spread since 2012 into Europe and Russia and across Asia. Lumpy skin disease virus (LSDV) is a vector-transmitted poxvirus that causes disease in cattle. Vector species involved in LSDV transmission and their ability to acquire and transmit the virus are poorly characterized. Using a highly representative bovine experimental model of lumpy skin disease, we fed four model vector species (Aedes aegypti, Culex quinquefasciatus, Stomoxys calcitrans, and Culicoides nubeculosus) on LSDV-inoculated cattle in order to examine their acquisition and retention of LSDV. Subclinical disease was a more common outcome than clinical disease in the inoculated cattle. Importantly, the probability of vectors acquiring LSDV from a subclinical animal (0.006) was very low compared with that from a clinical animal (0.23), meaning an insect feeding on a subclinical animal was 97% less likely to acquire LSDV than one feeding on a clinical animal. All four potential vector species studied acquired LSDV from the host at a similar rate, but Aedes aegypti and Stomoxys calcitrans retained the virus for a longer time, up to 8 days. There was no evidence of virus replication in the vector, consistent with mechanical rather than biological transmission. The parameters obtained in this study were combined with data from studies of LSDV transmission and vector life history parameters to determine the basic reproduction number of LSDV in cattle mediated by each of the model species. This reproduction number was highest for Stomoxys calcitrans (19.1), followed by C. nubeculosus (7.1) and Ae. aegypti (2.4), indicating that these three species are potentially efficient transmitters of LSDV; this information can be used to inform LSD control programs. IMPORTANCE Lumpy skin disease virus (LSDV) causes a severe systemic disease characterized by cutaneous nodules in cattle. LSDV is a rapidly emerging pathogen, having spread since 2012 into Europe and Russia and across Asia. The vector-borne nature of LSDV transmission is believed to have promoted this rapid geographic spread of the virus; however, a lack of quantitative evidence about LSDV transmission has hampered effective control of the disease during the current epidemic. Our research shows subclinical cattle play little part in virus transmission relative to clinical cattle and reveals a low probability of virus acquisition by insects at the preclinical stage. We have also calculated the reproductive number of different insect species, therefore identifying efficient transmitters of LSDV. This information is of utmost importance, as it will help to define epidemiological control measures during LSDV epidemics and of particular consequence in resource-poor regions where LSD vaccination may be less than adequate.
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The Stable Fly ( Stomoxys calcitrans) as a Possible Vector Transmitting Pathogens in Austrian Pig Farms. Microorganisms 2020; 8:microorganisms8101476. [PMID: 32993009 PMCID: PMC7601539 DOI: 10.3390/microorganisms8101476] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/17/2020] [Accepted: 09/24/2020] [Indexed: 12/19/2022] Open
Abstract
This pilot study aimed to investigate stable flies from Austrian pig farms for the presence of defined swine pathogens, such as porcine reproductive and respiratory syndrome virus (PRRSV), porcine circovirus 2 (PCV2), hemotrophic mycoplasmas in ingested blood and/or body parts and bacteria on the surface of the flies. Furthermore, the use of stable flies as a diagnostic matrix for the detection of pathogens in the ingested pig blood should be investigated. In total, 69 different microorganisms could be found on the surface of tested S. calcitrans from 20 different pig farms. Escherichia coli was the most common bacterium and could be found on flies from seven farms. In seven farms, hemotrophic mycoplasmas were detected in stable flies. PRRSV could not be found in any of the samples of these 20 farms but PCV2 was detected in six farms. Whether the stable fly can be used as a matrix to monitor the health status cannot be accurately determined through this study, especially in regard to PRRSV. Nevertheless, it might be possible to use the stable fly as diagnostic material for defined pathogens like Mycoplasma suis and PCV2.
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Vergne T, Andraud M, Bonnet S, De Regge N, Desquesnes M, Fite J, Etore F, Garigliany MM, Jori F, Lempereur L, Le Potier MF, Quillery E, Saegerman C, Vial L, Bouhsira E. Mechanical transmission of African swine fever virus by Stomoxys calcitrans: Insights from a mechanistic model. Transbound Emerg Dis 2020; 68:1541-1549. [PMID: 32910533 DOI: 10.1111/tbed.13824] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/18/2020] [Accepted: 09/03/2020] [Indexed: 11/30/2022]
Abstract
African swine fever (ASF) represents a global threat with huge economic consequences for the swine industry. Even though direct contact is likely to be the main transmission route from infected to susceptible hosts, recent epidemiological investigations have raised questions regarding the role of haematophagous arthropods, in particular the stable fly (Stomoxys calcitrans). In this study, we developed a mechanistic vector-borne transmission model for ASF virus (ASFV) within an outdoor domestic pig farm in order to assess the relative contribution of stable flies to the spread of the virus. The model was fitted to the ecology of the vector, its blood-feeding behaviour and pig-to-pig transmission dynamic. Model outputs suggested that in a context of low abundance (<5 flies per pig), stable flies would play a minor role in the spread of ASFV, as they are expected to be responsible for around 10% of transmission events. However, with abundances of 20 and 50 stable flies per pig, the vector-borne transmission would likely be responsible for almost 30% and 50% of transmission events, respectively. In these situations, time to reach a pig mortality of 10% would be reduced by around 26% and 40%, respectively. The sensitivity analysis emphasized that the expected relative contribution of stable flies was strongly dependent on the volume of blood they regurgitated and the infectious dose for pigs. This study identified crucial knowledge gaps that need to be filled in order to assess more precisely the potential contribution of stable flies to the spread of ASFV, including a quantitative description of the populations of haematophagous arthropods that could be found in pig farms, a better understanding of blood-feeding behaviours of stable flies and the quantification of the probability that stable flies partially fed with infectious blood transmit the virus to a susceptible pig during a subsequent blood-feeding attempt.
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Affiliation(s)
- Timothée Vergne
- UMR ENVT-INRAE IHAP, National Veterinary School of Toulouse, France
| | - Mathieu Andraud
- Unité d'Epidémiologie et de Bien-être Animal, Laboratoire de Ploufragan/Plouzané/Niort, Anses, France
| | - Sarah Bonnet
- UMR BIPAR, Animal Health Laboratory, INRAE, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, Maisons-Alfort Cedex, France
| | - Nick De Regge
- Sciensano, Scientific Direction Infectious Diseases in Animals, Brussels, Belgium
| | - Marc Desquesnes
- InterTryp, University of Montpellier, CIRAD, IRD, Montpellier, France
| | - Johanna Fite
- French Agency for Food, Environmental and Occupational Health & Safety, Maisons-Alfort Cedex, France
| | - Florence Etore
- French Agency for Food, Environmental and Occupational Health & Safety, Maisons-Alfort Cedex, France
| | - Mutien-Marie Garigliany
- Fundamental and Applied Research for Animal and Health (FARAH) Center, University of Liège, Liège
| | - Ferran Jori
- UMR Animal, Santé, Territoires, Risque et Ecosystèmes (ASTRE), CIRAD-INRAE Montpellier, Montpellier, France
| | | | | | - Elsa Quillery
- UMR Animal, Santé, Territoires, Risque et Ecosystèmes (ASTRE), CIRAD-INRAE Montpellier, Montpellier, France
| | - Claude Saegerman
- Fundamental and Applied Research for Animal and Health (FARAH) Center, University of Liège, Liège
| | - Laurence Vial
- UMR Animal, Santé, Territoires, Risque et Ecosystèmes (ASTRE), CIRAD-INRAE Montpellier, Montpellier, France
| | - Emilie Bouhsira
- UMR ENVT-INRAE InTheRes, National Veterinary School of Toulouse, Toulouse, France
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Sharif S, Liénard E, Duvallet G, Etienne L, Mongellaz C, Grisez C, Franc M, Bouhsira E, Jacquiet P. Attractiveness and Specificity of Different Polyethylene Blue Screens on Stomoxys calcitrans (Diptera: Muscidae). INSECTS 2020; 11:E575. [PMID: 32867238 PMCID: PMC7563190 DOI: 10.3390/insects11090575] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/24/2020] [Accepted: 08/25/2020] [Indexed: 11/16/2022]
Abstract
Stomoxys calcitrans is considered as a major pest of livestock worldwide. Insecticides have been extensively used to control this pest but resistance to these chemical compounds is now reported in many countries. Therefore, a more sustainable and efficient control is needed. Seven different types of blue screens, with reflectances around 460 nm, were tested during summer 2016 in southwestern France to evaluate their attractiveness and their specificity for stable flies. Height of the screen and orientation (east or west) of a blue screen were also considered. High levels of S. calcitrans captures were recorded during this study (from 141 to 7301 individuals per blue screen and per day) whereas the numbers of tabanids and pollinator insects remained extremely low (less than 10 individuals per screen and per day). No significant difference in attractiveness has been shown between the different types of blue screens. The lower half of the blue screens caught significantly more stable flies (70%) than the higher half (30%). The "east" side of the screen attracted 60% of stable flies but this was not significantly different from the west side. These results are highlighting the interest in these blue polyethylene screens for controlling stable flies in cattle farms, in comparison with more expensive blue fabrics.
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Affiliation(s)
- Shukri Sharif
- UMR INRAE ENVT 1225, Interactions Hôtes Agents Pathogènes, Université de Toulouse, 31076 Toulouse, France; (S.S.); (E.L.); (C.M.); (C.G.); (E.B.)
| | - Emmanuel Liénard
- UMR INRAE ENVT 1225, Interactions Hôtes Agents Pathogènes, Université de Toulouse, 31076 Toulouse, France; (S.S.); (E.L.); (C.M.); (C.G.); (E.B.)
| | - Gérard Duvallet
- CEFE, Université de Montpellier, CNRS, EPHE, IRD, Université Paul Valéry Montpellier 3, 34000 Montpellier, France; (G.D.); (L.E.)
| | - Lucas Etienne
- CEFE, Université de Montpellier, CNRS, EPHE, IRD, Université Paul Valéry Montpellier 3, 34000 Montpellier, France; (G.D.); (L.E.)
| | - Clément Mongellaz
- UMR INRAE ENVT 1225, Interactions Hôtes Agents Pathogènes, Université de Toulouse, 31076 Toulouse, France; (S.S.); (E.L.); (C.M.); (C.G.); (E.B.)
| | - Christelle Grisez
- UMR INRAE ENVT 1225, Interactions Hôtes Agents Pathogènes, Université de Toulouse, 31076 Toulouse, France; (S.S.); (E.L.); (C.M.); (C.G.); (E.B.)
| | - Michel Franc
- Laboratoire de Parasitologie, École Nationale Vétérinaire de Toulouse, 31076 Toulouse, France;
| | - Emilie Bouhsira
- UMR INRAE ENVT 1225, Interactions Hôtes Agents Pathogènes, Université de Toulouse, 31076 Toulouse, France; (S.S.); (E.L.); (C.M.); (C.G.); (E.B.)
| | - Philippe Jacquiet
- UMR INRAE ENVT 1225, Interactions Hôtes Agents Pathogènes, Université de Toulouse, 31076 Toulouse, France; (S.S.); (E.L.); (C.M.); (C.G.); (E.B.)
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Establishment and quantitative measure of Stomoxys calcitrans (Linnaeus, 1758) colony production in Rio de Janeiro, Brazil. VETERINARY PARASITOLOGY- REGIONAL STUDIES AND REPORTS 2020; 21:100434. [PMID: 32862900 DOI: 10.1016/j.vprsr.2020.100434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 06/22/2020] [Accepted: 06/27/2020] [Indexed: 11/21/2022]
Abstract
Functional insect vector colonies are essential for the study of their biology, evolution, behavior as well as control strategies of these organisms that transmit pathogens of medical and veterinary importance. In addition to the establishment, improvement and adaptation of pre-established protocols in the maintenance of a colony is important, as it may result in higher production of insects. Stomoxys calcitrans or stable fly causes important economic losses in production of beef and milk, besides mechanically transmitting a great variety of pathogens to cattle. In order to generate flies under laboratory conditions, a colony of S. calcitrans was established at our laboratory considering local environment geographical characteristics. Adults collected in UFRRJ campus were kept in the laboratory and maintained with daily feeding on anticoagulant-containing bovine blood offered in disposable sanitary napkins. Immature forms were maintained on diets rich in organic matter. The colony temperature and relative humidity were daily monitored as well as the development of insects. The monthly measured biological parameters included the development of eggs into pupae, of pupae into F1 adults and the comparison of the number of flies collected in the field with the number of F1 flies emerged in the laboratory. The data presented here was obtained from March to November 2019. In that period, the average per month of flies collected in the field was 604.2, of generated eggs was 2694.3, of generated pupae was 349.5 and of generated F1 flies in the laboratory was 205.9. Fluctuations of abiotic and biological factors contributed to an uneven production of flies in the colony throughout the months. This is the first report with numerical quantification of S. calcitrans flies production in a laboratory in Brazil. Some methodologies used in the colony shall be reevaluated and modified with the goal of obtaining higher numbers of flies generated in the laboratory over time.
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DNA of Theileria orientalis, T. equi and T. capreoli in stable flies (Stomoxys calcitrans). Parasit Vectors 2020; 13:186. [PMID: 32272968 PMCID: PMC7144340 DOI: 10.1186/s13071-020-04041-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 03/26/2020] [Indexed: 12/11/2022] Open
Abstract
Background From a veterinary-medical point of view, the stable fly, Stomoxys calcitrans, is perhaps the economically most important blood-sucking muscoid fly species (Diptera: Muscidae), owing to its worldwide occurrence, frequently high local abundance, direct harm caused to livestock, pet animals and humans, as well as its vector role. Considering the latter in the context of protozoan parasites, the stable fly is a mechanical vector of trypanosomes and Besnoitia besnoiti. However, its role as a vector of piroplasms appears to be seldom studied, despite old data suggesting mechanical transmission of babesiae by dipteran flies. Methods In this study 395 stable flies (and one Haematobia stimulans) were collected at a cattle farm with known history of bovine theileriosis, and at further nine, randomly chosen locations in Hungary. These flies were separated according to sex (30 of them also cut into two parts: the head with mouthparts and the thorax-abdomen), followed by individual DNA extraction, then screening for piroplasms by PCR and sequencing. Results In stable flies, Theileria orientalis and T. capreoli were identified at the cattle farm and T. equi was identified in three other locations. At the cattle farm, significantly more male stable flies carried piroplasm DNA than females. There was no significant difference between the ratio of PCR-positive flies between the stable (void of cattle for at least two hours) and the pen on the pasture with cattle at the time of sampling. Among dissected flies (29 S. calcitrans and 1 H. stimulans), exclusively the thoracic-abdominal parts were PCR-positive, whereas the head and mouthparts remained negative. Conclusions Theileria DNA is detectable in stable flies, in the case of T. orientalis at least for two hours after blood-feeding, and in the case of T. capreoli also in the absence of infected hosts (i.e. roe deer). Male flies rather than females, and thoracic-abdominal (most likely crop) contents rather than mouthparts may pose a risk of mechanical transmission. These data suggest that it is worth to study further the vector role of stable flies in the epidemiology of theilerioses, in which not the immediate, but rather the delayed type transmission seems possible.![]()
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Parravani A, Chivers CA, Bell N, Long S, Burden F, Wall R. Seasonal abundance of the stable fly Stomoxys calcitrans in southwest England. MEDICAL AND VETERINARY ENTOMOLOGY 2019; 33:485-490. [PMID: 31148203 DOI: 10.1111/mve.12386] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/29/2019] [Accepted: 05/02/2019] [Indexed: 06/09/2023]
Abstract
The stable fly Stomoxys calcitrans (L.) is a cosmopolitan biting fly of both economic and welfare concern, primarily as a result of its painful bite, which can cause blood loss, discomfort and loss of productivity in livestock. Between June and November in 2016 and May and December in 2017, Alsynite sticky-traps were deployed at four Donkey Sanctuary sites in southwest England, which experience recurrent seasonal biting fly problems. The aim was to evaluate the seasonal dynamics of the stable fly populations and the risk factors associated with abundance. In total, 19 835 S. calcitrans were trapped during the study period. In both years, abundance increased gradually over summer months, peaking in late August/September. There were no relationships between seasonally detrended abundance and any climatic factors. Fly abundance was significantly different between sites and population size was consistent between years at three of the four sites. The median chronological age, as determined by pteridine analysis of flies caught live when blood-feeding, was 4.67 days (interquartile range 3.8-6.2 days) in males and 6.79 days (interquartile range 4.8-10.4 days) in females; there was no significant, consistent change in age or age structure over time, suggesting that adult flies emerge continuously over the summer, rather than in discrete age-related cohorts. The data suggest that flies are more abundant in the vicinity of active animal facilities, although the strong behavioural association between flies and their hosts means that they are less likely to be caught on traps where host availability is high. The implications of these results for fly management are discussed.
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Affiliation(s)
- A Parravani
- School of Biological Sciences, University of Bristol, Bristol, U.K
| | - C-A Chivers
- School of Biological Sciences, University of Bristol, Bristol, U.K
| | - N Bell
- The Donkey Sanctuary, Devon, U.K
| | - S Long
- The Donkey Sanctuary, Devon, U.K
| | - F Burden
- The Donkey Sanctuary, Devon, U.K
| | - R Wall
- School of Biological Sciences, University of Bristol, Bristol, U.K
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Gubbins S. Using the basic reproduction number to assess the risk of transmission of lumpy skin disease virus by biting insects. Transbound Emerg Dis 2019; 66:1873-1883. [PMID: 31038286 PMCID: PMC6767157 DOI: 10.1111/tbed.13216] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 04/24/2019] [Accepted: 04/25/2019] [Indexed: 01/23/2023]
Abstract
In recent years, lumpy skin disease virus (LSDV) has emerged as a major threat to cattle outside Africa, where it is endemic. Although evidence suggests that LSDV is transmitted by the bites of blood sucking arthropods, few studies have assessed the risk of transmission posed by particular vector species. Here this risk is assessed by calculating the basic reproduction number (R0 ) for transmission of LSDV by five species of biting insect: the stable fly, Stomoxys calcitrans, the biting midge, Culicoides nubeculosus, and three mosquito species, Aedes aegypti, Anopheles stephensi, and Culex quinquefasciatus. Parameters relating to mechanical transmission of LSDV were estimated using new analyses of previously published data from transmission experiments, while vector life history parameters were derived from the published literature. Uncertainty and sensitivity analyses were used to compute R0 for each species and to identify those parameters which influence its magnitude. Results suggest that S. calcitrans is likely to be the most efficient at transmitting LSDV, with Ae. aegypti also an efficient vector. By contrast, C. nubeculosus, An. stephensi, and Cx. quinquefasciatus are likely to be inefficient vectors of LSDV. However, there is considerable uncertainty associated with the estimates of R0 , reflecting uncertainty in most of the constituent parameters. Sensitivity analysis suggests that future experimental work should focus on estimating the probability of transmission from insect to bovine and on the virus inactivation rate in insects.
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Sharif S, Jacquiet P, Prevot F, Grisez C, Raymond‐Letron I, Semin MO, Geffré A, Trumel C, Franc M, Bouhsira É, Liénard E. Stomoxys calcitrans, mechanical vector of virulent Besnoitia besnoiti from chronically infected cattle to susceptible rabbit. MEDICAL AND VETERINARY ENTOMOLOGY 2019; 33:247-255. [PMID: 30666684 PMCID: PMC6850491 DOI: 10.1111/mve.12356] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 10/31/2018] [Accepted: 11/14/2018] [Indexed: 05/27/2023]
Abstract
Cattle besnoitiosis caused by Besnoitia besnoiti (Eucoccidiorida: Sarcocystidae) is a re-emerging disease in Europe. Its mechanical transmission by biting flies has not been investigated since the 1960s. The aim of this study was to re-examine the ability of Stomoxys calcitrans (Diptera: Muscidae) to transmit virulent B. besnoiti bradyzoites from chronically infected cows to susceptible rabbits. Three batches of 300 stable flies were allowed to take an interrupted bloodmeal on chronically infected cows, followed by an immediate bloodmeal on three rabbits (Group B). A control group of rabbits and a group exposed to the bites of non-infected S. calcitrans were included in the study. Blood quantitative polymerase chain reaction (qPCR) analyses, and clinical, serological and haematological surveys were performed in the three groups over 152 days until the rabbits were killed. Quantitative PCR analyses and histological examinations were performed in 24 tissue samples per rabbit. Only one rabbit in Group B exhibited clinical signs of the acute phase of besnoitiosis (hyperthermia, weight loss, regenerative anaemia and transient positive qPCR in blood) and was seroconverted. Parasite DNA was detected in four tissue samples from this rabbit, but no cysts were observed on histological examination. These findings indicate that S. calcitrans may act as a mechanical vector of B. besnoiti more efficiently than was previously considered.
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Affiliation(s)
- S. Sharif
- Département Élevage et Produits–Santé Publique Vétérinaire, Laboratoire de Parasitologie et Maladies Parasitaires, École Nationale Vétérinaire de Toulouse (ENVT)Université de ToulouseToulouseFrance
- Département Santé Animale, Interactions Hôtes–Agents Pathogènes (IHAP), Institut National de la Recherche Agronomique (INRA), ENVTUniversité de ToulouseToulouseFrance
| | - P. Jacquiet
- Département Élevage et Produits–Santé Publique Vétérinaire, Laboratoire de Parasitologie et Maladies Parasitaires, École Nationale Vétérinaire de Toulouse (ENVT)Université de ToulouseToulouseFrance
- Département Santé Animale, Interactions Hôtes–Agents Pathogènes (IHAP), Institut National de la Recherche Agronomique (INRA), ENVTUniversité de ToulouseToulouseFrance
| | - F. Prevot
- Département Élevage et Produits–Santé Publique Vétérinaire, Laboratoire de Parasitologie et Maladies Parasitaires, École Nationale Vétérinaire de Toulouse (ENVT)Université de ToulouseToulouseFrance
- Département Santé Animale, Interactions Hôtes–Agents Pathogènes (IHAP), Institut National de la Recherche Agronomique (INRA), ENVTUniversité de ToulouseToulouseFrance
| | - C. Grisez
- Département Élevage et Produits–Santé Publique Vétérinaire, Laboratoire de Parasitologie et Maladies Parasitaires, École Nationale Vétérinaire de Toulouse (ENVT)Université de ToulouseToulouseFrance
- Département Santé Animale, Interactions Hôtes–Agents Pathogènes (IHAP), Institut National de la Recherche Agronomique (INRA), ENVTUniversité de ToulouseToulouseFrance
| | - I. Raymond‐Letron
- Département Santé Biologiques et Fonctionnelles, Laboratoire d'HistoPathologie Expérimentale et Comparée (LabHPEC), ENVTUniversité de ToulouseToulouseFrance
- STROMALab, Université de Toulouse, CNRS ERL5311, EFS, ENVT, Institut National de la Santé et de la Recherche Médicale (INSERM) U1031Université de ToulouseToulouseFrance
| | - M. O. Semin
- Département Santé Biologiques et Fonctionnelles, Laboratoire d'HistoPathologie Expérimentale et Comparée (LabHPEC), ENVTUniversité de ToulouseToulouseFrance
| | - A. Geffré
- Département Sciences Cliniques Des Animaux De Compagnie, Équipe de Biologie Médicale‐Histologie, Centre Régional d'Exploration Fonctionnelle et de Ressources Expérimentales, INSERM, ENVTUniversité de ToulouseToulouseFrance
| | - C. Trumel
- Département Sciences Cliniques Des Animaux De Compagnie, Équipe de Biologie Médicale‐Histologie, Centre Régional d'Exploration Fonctionnelle et de Ressources Expérimentales, INSERM, ENVTUniversité de ToulouseToulouseFrance
| | - M. Franc
- Département Élevage et Produits–Santé Publique Vétérinaire, Laboratoire de Parasitologie et Maladies Parasitaires, École Nationale Vétérinaire de Toulouse (ENVT)Université de ToulouseToulouseFrance
| | - É. Bouhsira
- Département Élevage et Produits–Santé Publique Vétérinaire, Laboratoire de Parasitologie et Maladies Parasitaires, École Nationale Vétérinaire de Toulouse (ENVT)Université de ToulouseToulouseFrance
- Département Santé Animale, Interactions Hôtes–Agents Pathogènes (IHAP), Institut National de la Recherche Agronomique (INRA), ENVTUniversité de ToulouseToulouseFrance
| | - E. Liénard
- Département Élevage et Produits–Santé Publique Vétérinaire, Laboratoire de Parasitologie et Maladies Parasitaires, École Nationale Vétérinaire de Toulouse (ENVT)Université de ToulouseToulouseFrance
- Département Santé Animale, Interactions Hôtes–Agents Pathogènes (IHAP), Institut National de la Recherche Agronomique (INRA), ENVTUniversité de ToulouseToulouseFrance
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Nachman G, Skovgård H. 16. The Fly Simulator: a simulation model of stable flies and their control. ACTA ACUST UNITED AC 2018. [DOI: 10.3920/978-90-8686-863-6_16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Gösta Nachman
- Department of Biology, Section of Ecology and Evolution, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen Ø, Denmark
| | - Henrik Skovgård
- Department of Biology, Section of Ecology and Evolution, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen Ø, Denmark
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Survival and localization of African swine fever virus in stable flies (Stomoxys calcitrans) after feeding on viremic blood using a membrane feeder. Vet Microbiol 2018; 222:25-29. [DOI: 10.1016/j.vetmic.2018.06.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 06/12/2018] [Accepted: 06/15/2018] [Indexed: 11/19/2022]
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Olesen AS, Lohse L, Hansen MF, Boklund A, Halasa T, Belsham GJ, Rasmussen TB, Bøtner A, Bødker R. Infection of pigs with African swine fever virus via ingestion of stable flies (Stomoxys calcitrans). Transbound Emerg Dis 2018; 65:1152-1157. [PMID: 29877056 DOI: 10.1111/tbed.12918] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 05/01/2018] [Accepted: 05/08/2018] [Indexed: 11/30/2022]
Abstract
Within Eastern Europe, African swine fever virus (ASFV) has unexpectedly spread to farms with high biosecurity. In an attempt to explain this process, pigs were allowed to ingest flies that had fed on ASFV-spiked blood, which had a realistic titre for an infected pig. Some of the pigs became infected with the virus. Thus, ingestion of blood-sucking flies, having fed on ASFV-infected wild boar before entering stables, represents a potential route for disease transmission.
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Affiliation(s)
- Ann Sofie Olesen
- DTU National Veterinary Institute, Technical University of Denmark, Lindholm, Kalvehave, Denmark
| | - Louise Lohse
- DTU National Veterinary Institute, Technical University of Denmark, Lindholm, Kalvehave, Denmark
| | - Mette Frimodt Hansen
- DTU National Veterinary Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Anette Boklund
- DTU National Veterinary Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Tariq Halasa
- DTU National Veterinary Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Graham J Belsham
- DTU National Veterinary Institute, Technical University of Denmark, Lindholm, Kalvehave, Denmark
| | - Thomas Bruun Rasmussen
- DTU National Veterinary Institute, Technical University of Denmark, Lindholm, Kalvehave, Denmark
| | - Anette Bøtner
- DTU National Veterinary Institute, Technical University of Denmark, Lindholm, Kalvehave, Denmark
| | - René Bødker
- DTU National Veterinary Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
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22
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Chamchod F. Modeling the spread of capripoxvirus among livestock and optimal vaccination strategies. J Theor Biol 2018; 437:179-186. [DOI: 10.1016/j.jtbi.2017.10.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 09/01/2017] [Accepted: 10/08/2017] [Indexed: 12/01/2022]
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23
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Jelvez Serra NS, Goulart HF, Triana MF, Dos Santos Tavares S, Almeida CIM, DA Costa JG, Santana AEG, Zhu JJ. Identification of stable fly attractant compounds in vinasse, a byproduct of sugarcane-ethanol distillation. MEDICAL AND VETERINARY ENTOMOLOGY 2017; 31:381-391. [PMID: 28833391 DOI: 10.1111/mve.12246] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 03/19/2017] [Accepted: 04/20/2017] [Indexed: 06/07/2023]
Abstract
The stable fly, Stomoxys calcitrans (Diptera: Muscidae), is a worldwide pest of livestock. Recent outbreaks of stable flies in sugarcane fields in Brazil have become a serious problem for livestock producers. Larvae and pupae found inside sugarcane stems after harvesting may indicate that stable flies use these stems as potential oviposition or larval development sites. Field observations suggest that outbreaks of stable flies are associated with the vinasse and filter cake derived from biomass distillation in sugarcane ethanol production that are used as fertilizers in sugarcane fields. Adult stable flies are attracted to vinasse, which appears to present an ideal larval development site. The primary goal of the present study is to demonstrate the role of vinasse in influencing the sensory physiological and behavioural responses of stable flies, and to identify its associated volatile attractant compounds. Both laboratory and field studies showed that vinasse is extremely attractive to adult stable flies. Chemical analyses of volatiles collected revealed a wide range of carboxylic acids, alcohols, phenols and aldehydes as potential attractant compounds. These newly identified attractants could be used to develop a tool for the attractant-baited mass trapping of stable flies in order to reduce infestations.
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Affiliation(s)
- N S Jelvez Serra
- Biology Department, Lund University, Lund, Sweden
- Instituto de Quimica e Biotecnologia, Universidade Federal de Alagoas, Maceio, Brazil
| | - H F Goulart
- Centro de Ciencias Agrarias, Universidade Federal de Alagoas, Rio-Largo, Brazil
| | - M F Triana
- Instituto de Quimica e Biotecnologia, Universidade Federal de Alagoas, Maceio, Brazil
| | - S Dos Santos Tavares
- Instituto de Quimica e Biotecnologia, Universidade Federal de Alagoas, Maceio, Brazil
| | - C I M Almeida
- Instituto de Quimica e Biotecnologia, Universidade Federal de Alagoas, Maceio, Brazil
| | - J G DA Costa
- Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Tabuleiros Costeiros, Rio Largo, Brazil
| | - A E G Santana
- Instituto de Quimica e Biotecnologia, Universidade Federal de Alagoas, Maceio, Brazil
| | - J J Zhu
- U.S. Department of Agriculture-Agricultural Research Service, Agrosystem Management Research Unit, Lincoln, NE, U.S.A
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Skovgård H, Nachman G. Modeling the Temperature- and Age-Dependent Survival, Development, and Oviposition Rates of Stable Flies (Stomoxys calcitrans) (Diptera: Muscidae). ENVIRONMENTAL ENTOMOLOGY 2017; 46:1130-1142. [PMID: 28981634 DOI: 10.1093/ee/nvx118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Indexed: 06/07/2023]
Abstract
Stable flies (Stomoxys calcitrans (L.)) can be a serious pest associated with cattle facilities. In Denmark, they occur most abundantly at organic farms, where they cannot be controlled by means of insecticides. On traditional farms, where chemical control is widely used, development of resistance is of increasing concern. Therefore, interest in biological control or other alternative methods has been growing during the recent years. In order to understand the complex relationships between a pest and its natural enemies in a variable environment, it is necessary to know how temperature affects the dynamics of the involved species. In this paper, we apply data derived from several existing sources to investigate the influence of temperature on development and survival of eggs, larvae, pupae, and adult stable flies, as well as on the fecundity of adult females. We demonstrate that the same modeling framework (called SANDY), previously applied to lifetable data of the pteromalid pupal parasitoid (Spalangia cameroni Perkins), a biological control agent used against stable flies, can also be used to model S. calcitrans. However, the predicted temperature responses depend on the data sources used to parameterize the model, which is reflected by differences in estimated population growth rates obtained from American and non-American studies. Elasticity analysis shows that growth rates are more sensitive to changes in viability, in particular of adult flies, than in fecundity, which may have implications for the management of stable fly populations.
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Affiliation(s)
- Henrik Skovgård
- Department of Agroecology, Section of Pathology and Entomology, University of Aarhus, Forsøgsvej 1, DK-4200 Slagelse, Denmark
| | - Gösta Nachman
- Department of Biology, Section of Ecology and Evolution, Universitetsparken 15, DK 2100 Copenhagen Ø, Denmark
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Baldacchino F, Muenworn V, Desquesnes M, Desoli F, Charoenviriyaphap T, Duvallet G. Transmission of pathogens by Stomoxys flies (Diptera, Muscidae): a review. ACTA ACUST UNITED AC 2013; 20:26. [PMID: 23985165 PMCID: PMC3756335 DOI: 10.1051/parasite/2013026] [Citation(s) in RCA: 145] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 08/13/2013] [Indexed: 12/02/2022]
Abstract
Stomoxys flies are mechanical vectors of pathogens present in the blood and skin of their animal hosts, especially livestock, but occasionally humans. In livestock, their direct effects are disturbance, skin lesions, reduction of food intake, stress, blood loss, and a global immunosuppressive effect. They also induce the gathering of animals for mutual protection; meanwhile they favor development of pathogens in the hosts and their transmission. Their indirect effect is the mechanical transmission of pathogens. In case of interrupted feeding, Stomoxys can re-start their blood meal on another host. When injecting saliva prior to blood-sucking, they can inoculate some infected blood remaining on their mouthparts. Beside this immediate transmission, it was observed that Stomoxys may keep some blood in their crop, which offers a friendly environment for pathogens that could be regurgitated during the next blood meal; thus a delayed transmission by Stomoxys seems possible. Such a mechanism has a considerable epidemiological impact since it allows inter-herd transmission of pathogens. Equine infectious anemia, African swine fever, West Nile, and Rift Valley viruses are known to be transmitted by Stomoxys, while others are suspected. Rickettsia (Anaplasma, Coxiella), other bacteria and parasites (Trypanosoma spp., Besnoitia spp.) are also transmitted by Stomoxys. Finally, Stomoxys was also found to act as an intermediate host of the helminth Habronema microstoma and may be involved in the transmission of some Onchocerca and Dirofilaria species. Being cosmopolite, Stomoxys calcitrans might have a worldwide and greater impact than previously thought on animal and human pathogen transmission.
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Affiliation(s)
- Frédéric Baldacchino
- Centre d'Écologie Fonctionnelle et Évolutive (UMR 5175), Université Montpellier 3, Route de Mende, 34199 Montpellier Cedex 5, France
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26
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Baldacchino F, Tramut C, Salem A, Liénard E, Delétré E, Franc M, Martin T, Duvallet G, Jay-Robert P. The repellency of lemongrass oil against stable flies, tested using video tracking. Parasite 2013; 20:21. [PMID: 23759542 PMCID: PMC3718533 DOI: 10.1051/parasite/2013021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Accepted: 05/31/2013] [Indexed: 11/14/2022] Open
Abstract
Lemongrass oil (Cymbopogon citratus) is an effective repellent against mosquitoes (Diptera: Culicidae) and house flies (Diptera: Muscidae). In this study, its effectiveness was assessed on stable flies (Diptera: Muscidae) in laboratory conditions. First, we demonstrated that lemongrass oil is an active substance for antennal olfactory receptor cells of Stomoxys calcitrans as indicated by a significant increase in the electroantennogram responses to increasing doses of lemongrass oil. Feeding-choice tests in a flight cage with stable flies having access to two blood-soaked sanitary pads, one of which was treated with lemongrass oil, showed that stable flies (n = 24) spent significantly more time in the untreated zone (median value = 218.4 s) than in the treated zone (median value = 63.7 s). No stable flies fed on the treated pad, whereas nine fed on the untreated pad. These results suggest that lemongrass oil could be used as an effective repellent against stable flies. Additional studies to confirm its spatial repellent and feeding deterrent effects are warranted.
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Affiliation(s)
- Frédéric Baldacchino
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Dynamique et Gouvernance des Systèmes Écologiques, Centre d’Écologie Fonctionnelle et Évolutive (CEFE), UMR 5175, Université Paul-Valéry (UM3) Montpellier France
| | - Coline Tramut
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Dynamique et Gouvernance des Systèmes Écologiques, Centre d’Écologie Fonctionnelle et Évolutive (CEFE), UMR 5175, Université Paul-Valéry (UM3) Montpellier France
| | - Ali Salem
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Laboratoire de Parasitologie, École Nationale Vétérinaire (ENVT) Toulouse France
| | - Emmanuel Liénard
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Laboratoire de Parasitologie, École Nationale Vétérinaire (ENVT) Toulouse France
| | - Emilie Delétré
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Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), UR-Hortsys Montpellier France
| | - Michel Franc
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Laboratoire de Parasitologie, École Nationale Vétérinaire (ENVT) Toulouse France
| | - Thibaud Martin
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Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), UR-Hortsys Montpellier France
| | - Gérard Duvallet
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Dynamique et Gouvernance des Systèmes Écologiques, Centre d’Écologie Fonctionnelle et Évolutive (CEFE), UMR 5175, Université Paul-Valéry (UM3) Montpellier France
| | - Pierre Jay-Robert
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Dynamique et Gouvernance des Systèmes Écologiques, Centre d’Écologie Fonctionnelle et Évolutive (CEFE), UMR 5175, Université Paul-Valéry (UM3) Montpellier France
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Liénard E, Salem A, Jacquiet P, Grisez C, Prévot F, Blanchard B, Bouhsira E, Franc M. Development of a protocol testing the ability of Stomoxys calcitrans (Linnaeus, 1758) (Diptera: Muscidae) to transmit Besnoitia besnoiti (Henry, 1913) (Apicomplexa: Sarcocystidae). Parasitol Res 2012; 112:479-86. [PMID: 23064799 PMCID: PMC3556472 DOI: 10.1007/s00436-012-3157-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 09/27/2012] [Indexed: 11/07/2022]
Abstract
Cattle besnoitiosis due to the cyst-forming coccidian parasite Besnoitia besnoiti has recently been reported in expansion in Europe since the end of the twentieth century. The B. besnoiti life cycle and many epidemiological traits are still poorly known. Hematophagous flies, including the worldwide-distributed Stomoxys calcitrans, could be mechanical vectors in the contamination of mouthparts after the puncture of cutaneous cysts or ingestion of infected blood. In this study, a protocol is presented to assess more deeply the role of S. calcitrans, reared in laboratory conditions, in parasite transmission. A preliminary trial showed that stable flies could transmit tachyzoites from bovine artificially parasite-enriched blood to B. besnoiti-free blood using glass feeders. Evidence of transmission was provided by the detection of parasite DNA with Ct values ranging between 32 and 37 in the blood recipient. In a second time, a B. besnoiti-infected heifer harboring many cysts in its dermis was used as a donor of B. besnoiti. An interruption of the blood meal taken by 300 stable flies from this heifer was performed. Immediately after the blood meal was interrupted, they were transferred to a glass feeder containing B. besnoiti-free blood from a non-infected heifer. Quantitative PCR and modified direct fluorescence antibody test (dFAT) were used to detect B. besnoiti DNA and entire parasites, respectively, in the blood recipient, the mouthparts, and the gut contents of S. calcitrans at two time intervals: 1 and 24 h after the interrupted blood meal. Parasite DNA was detected at both time intervals (1 and 24 h) in all samples (blood recipient, mouthparts, and gut contents of stable flies) while entire parasites by dFAT were only found in the abdominal compartment 1 h after the interrupted blood meal. Then, S. calcitrans were able to carry B. besnoiti from chronically infected cattle to an artificial recipient in the conditions of the protocol.
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Affiliation(s)
- E Liénard
- Laboratoire de Parasitologie, Université de Toulouse, INP, ENVT, F-31076 Toulouse, France.
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