TY - JOUR. T1 - A rapid method for the detection of sibling species in samples of black fly larvae (Diptera. T2 - Simuliidae). AU - Brockhouse, Charles. AU - Tanguay, R. M.. PY - 1996. Y1 - 1996. UR - http://www.scopus.com/inward/record.url?scp=23644450614&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=23644450614&partnerID=8YFLogxK. M3 - Article. VL - 13. SP - 339. EP - 347. JO - Journal of Agricultural and Urban Entomology. JF - Journal of Agricultural and Urban Entomology. SN - 1523-5475. IS - 4. ER - ...
Animated coloured scanning electron micrograph (SEM) of Black fly larva (Simulium hippovorum). Note the ribbon of silk coming from the mouth area. All known species of black flies produce silk for mooring lines for anchorage to substrates in flowing water. A pair of silk glands run the length of the body, the strands of silk emerge from a silk duct below the mouth and are cut and guided by a series of teeth on the mandible and hypostoma. Black flies are considered a human pest in some areas of the US and Canada. Adult females of certain species are fierce biters, whereas others are strictly a nuisance by their presence around exposed skin areas. Female black flies require a blood meal; males feed mainly on nectar. Black flies can transmit filarial worms to humans resulting in a disease called onchocerciasis, which cause blindness. - Stock Video Clip K006/9266
TAKAOKA, HIROYUKI (2015) A multi-locus approach resolves the phylogenetic relationships of the Simulium asakoae and Simulium ceylonicum species groups (Diptera: Simuliidae) in Malaysia: evidence for distinct evolutionary lineages. Medical and Veterinary Entomology, 29. pp. 330-337. TAKAOKA, HIROYUKI (2015) A new case of zoonotic onchocercosis in northern Kyushu, Japan. Parasitology International, 64. pp. 519-521. TAKAOKA, HIROYUKI (2015) Are black flies of the subgenus Wilhelmia (Diptera: Simuliidae) multiple species or a single geographical generalist? Insights from the macrogenome. Biological Journal of the Linnean Society, 114. pp. 163-183. TAKAOKA, HIROYUKI (2015) Biogeographgical Distribution and Phylogenetic Analysis of Simulium (Wallacellum) (Diptera: Similiidae) Based on the Mitochondrial Sequences. South Pacific Studies, 35 (2). pp. 45-46. TAKAOKA, HIROYUKI (2015) Cytogenetic and Molecular Evidence of Additional Cryptic Diversity in High Elevation Black fly Simulium feuerborni (Diptera: ...
McCreadie JW, Adler PH, Larson R. 2012. Variation in larval fitness of a black fly species over heterogeneous habitats. Aquatic Insects. 34: 143-150. Wagner R , Adler, PH. McCreadie JW. 2012. Description of a new species and redescriptions of two known species of the genus Telmatoscopus EATON (Diptera: Psychodidae) from Alabama, USA. Studia dipterologica, in press McCreadie JW, Adler PH and Beard CE. 2011. Ecology of Symbioites of larval black flie(Diptera: Simuliidae): distribution, diversity and scale. Environmental Entomology 40: 289-302. Neldler MP, Beard CE and McCreadie JW. 2010. Seasonality and host usage of trichomycetes in larval black flies (Diptera: Simuliidae) of southern Alabama, USA. Fungal Ecology 3: 43- 48. Adler PH and McCreadie JW. 2009. Black Flies. Medical and Veterinary Entomology. In: Medical and Veterinary Entomology (2nd ed) Mullens G, Durden L (eds). Academic Press. Benton EP and McCreadie JW. 2009. A preliminary survey of the Fulgoroidea (Auchenorrhyncha) of coastal ...
Vesicular stomatitis is an economically important arboviral disease of livestock. Viremia is absent in infected mammalian hosts, and the mechanism by which insects become infected with the causative agents, vesicular stomatitis viruses, remains unknown. Because infected and noninfected insects potentially feed on the same host in nature, infected and noninfected black flies were allowed to feed on the same host. Viremia was not detected in the host after infection by a black fly bite, but because noninfected black flies acquired the virus while co-feeding on the same host with infected black flies, it is concluded that a viremic host is not necessary for an insect to be infected with the virus. Thus co-feeding is a mechanism of infection for an insect-transmitted virus. ...
In southern California, ocular infections caused by Onchocerca lupi were diagnosed in 3 dogs (1 in 2006, 2 in 2012). The infectious agent was confirmed through morphologic analysis of fixed parasites in tissues and by PCR and sequencing of amplicons derived from 2 mitochondrially encoded genes and 1 nuclear-encoded gene. A nested PCR based on the sequence of the cytochrome oxidase subunit 1 gene of the parasite was developed and used to screen Simulium black flies collected from southern California for O. lupi DNA. Six (2.8%; 95% CI 0.6%-5.0%) of 213 black flies contained O. lupi DNA. Partial mitochondrial16S rRNA gene sequences from the infected flies matched sequences derived from black fly larvae cytotaxonomically identified as Simulium tribulatum. These data implicate S. tribulatum flies as a putative vector for O. lupi in southern California ...
Interpretive Summary: Vesicular stomatitis virus (VSV) affects cattle, horses and pigs. The virus is spread by biting flies, causes a disease of significant economic impact in horses and in cattle and pigs, clinical signs can be a confounded for those of foot-and-mouth disease. The mechanisms of this disease have not been well elucidated. For example despite the fact that is causes lesiosn in mouth and feet, there is no evidence of blood invasion and little is known regarding virus distribution during early infection in livestock. Here we inoculated Holstein steers on the feet with VS New Jersey virus, either by directly scratching the surface of the skin (scarification) or by allowing infected black flies (Simulium vittatum) to feed in the same areas. Our findings confirmed that in both cases the virus remained localized to the inoculated skin and lymphatic nodes draining the inoculated legs (i.e. no virus was found in the blood) and lesions appeared only in the infected leg. Control animals ...
Only four genera in the family Simuliidae, Simulium, Prosimulium, Austrosimulium, and Cnephia, contain species that feed on people, though other species prefer to feed on other mammals or on birds. Simulium, the type genus, is the most widespread and is a vector for several diseases, including river blindness. Mature adults can disperse tens or hundreds of kilometers from their breeding grounds in fresh flowing water, under their own power and assisted by prevailing winds, complicating control efforts. Swarming behavior can make outdoor activities unpleasant or intolerable, and can affect livestock production. During the 18th century, the "Golubatz fly" (Simulium colombaschense) was a notorious pest in central Europe.[8] Even non-biting clouds of black flies, whether composed of males or of species that do not feed on humans or do not require a blood meal before egg laying, can form a nuisance by swarming into orifices. Bites are shallow and accomplished by first stretching the skin using teeth ...
Like most biting insects, black flies (Simulium vittatum) secrete products in their saliva to prevent blood from clotting while theyre taking their meal. Hitoshi Tsujimoto and his colleagues from the University of Georgia, the Academy of Sciences of the Czech Republic and from the National Institutes of Health have identified just such a protein in black fly saliva, dubbed Simukunin. It is expressed only in females but not males, who feed on nectar rather than blood ...
Geiger A, Fardeau M-L, Grebaut P, Vatunga G, Josénando T, Herder S, Cuny G, Truc P & Ollivier B (2009) First isolation of Enterobacter, Enterococcus, and Acinetobacter spp. as inhabitants of the tsetse fly (Glossina palpalis palpalis) midgut. Infect Genet Evol 9: 1364-1370 ...
Black flies, turkey gnats or "White Socks" as some are colloquially known as in parts of the U.S. are a family of biting flies belonging to the Simuliidae family in the world of the Diptera or true flies. The Simulium genus is by far the most well-known genus as many of its 700+ members (sounds like Im addressing a convention of critters) transmit infectious diseases such as river blindness or Onchocerciasis (Gregors affiliated charity Fighting Blindness will be all but too aware of this horrible disease), bovine Onchocerciasis (cattle blindness) and leucocytozoonosis (an immuno-compromising infection leading to gauntness and emaciation in wild birds). The "White Socks" include Simulium venustum amongst other members within the Simulium genus and are also known as "White stocking" flies because of the rather evident bands of white coursing the legs of individuals. These flies do not spread the majority of the above mentioned infectious diseases nor do the species that reside within the British ...
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Onchocerciasis is a neglected tropical disease that has plagued mankind for decades with pathologies that involve the eyes and the skin. The WHO and the global health community have earmarked the disease for global elimination by 2045. However, as control programmes shift focus from reduction of the burden of the disease to elimination, new tools and strategies may be needed to meet targets. Monitoring|i| Onchocerca volvulus |/i|larvae in the black fly vectors is an important tool needed to monitor disease dynamics and certify elimination. For decades, human landing collections have been the sole means of acquiring vectors for monitoring of the disease. This procedure has been plagued with ethical concerns and sometimes the inability to harvest enough black flies needed to carry out effective monitoring. Since the 1960s, the WHO recognized the need to replace human landing collections but relatively few field studies have designed and tested alternative traps. This review article systematically
Al-Kuwaiti, N.A., Maruthi, M.N. and Seal, S.E. (2016) Molecular characterization of potyviruses infecting potato and vegetables in Iraq. Journal of Plant Pathology: An International Journal of the Italian Phytopathological Society, 98 (3). ISSN 1125-4653 (doi:/10.4454/JPP.V98I3.029) Arnold, Sarah, Stevenson, Philip and Belmain, Steven (2016) Shades of yellow: interactive effects of visual and odour cues in a pest beetle. PeerJ, 4:e2219. ISSN 2376-5992 (Print), 2167-8359 (Online) (doi:10.7717/peerj.2219) Bömer, Moritz, Turaki, Aliyu A., Silva, Gonçalo, Kumar, P. Lava and Seal, Susan E. (2016) A sequence-independent strategy for amplification and characterisation of episomal badnavirus sequences reveals three previously uncharacterised yam badnaviruses. Viruses, 8:188. pp. 1-22. ISSN 1999-4915 (Print), 1999-4915 (Online) (doi:10.3390/v8070188) Cheke, R. A., Young, S. and Garms, R. (2016) Inverse density dependence of parity rates in the onchocerciasis vector Simulium damnosum s.l. Medical and ...
Background In West Africa, there are two strains of the filarial parasite Onchocerca volvulus, which differ in their ability to induce ocular disease. Transmission studies have suggested that six sibling species of the parasite vector, the black fly Simulium damnosum sensu lato, allow development of the two strains of O volvulus with varying...
Bonnet, Julien, Pennetier, Cédric, Duchon, Stéphane, Lapied, Bruno and Corbel, Vincent (2009) Multi-function oxidases are responsible for the synergistic interactions occurring between repellents and insecticides in mosquitoes. Parasites & Vectors, 2 (17). ISSN 1756-3305 (doi:10.1186/1756-3305-2-17) Hawkes, Frances and Gibson, Gabriella (2016) Seeing is believing: the nocturnal malarial mosquito Anopheles coluzzii responds to visual host-cues when odour indicates a host is nearby. Parasites & Vectors, 8. p. 320. ISSN 1756-3305 (Print), 1756-3305 (Online) (doi:10.1186/s13071-016-1609-z) Lamberton, Poppy H. L., Cheke, Robert A., Walker, Martin, Winskill, Peter, Crainey, J. Lee, Boakye, Daniel A., Osei-Atweneboana, Mike Y., Tirados, Iñaki, Wilson, Michael D., Tetteh-Kumah, Anthony, Otoo, Sampson, Post, Rory J. and Basañez, María-Gloria (2016) Onchocerciasis transmission in Ghana: the human blood index of sibling species of the Simulium damnosum complex. Parasites & Vectors, 9 (1). ISSN ...
Black flies, turkey gnats or "White Socks" as some are colloquially known as in parts of the U.S. are a family of biting flies belonging to the Simuliidae family in the world of the Diptera or true flies. The Simulium genus is by far the most well-known genus as many of its 700+ members (sounds like Im addressing a convention of critters) transmit infectious diseases such as river blindness or Onchocerciasis (Gregors affiliated charity Fighting Blindness will be all but too aware of this horrible disease), bovine Onchocerciasis (cattle blindness) and leucocytozoonosis (an immuno-compromising infection leading to gauntness and emaciation in wild birds). The "White Socks" include Simulium venustum amongst other members within the Simulium genus and are also known as "White stocking" flies because of the rather evident bands of white coursing the legs of individuals. These flies do not spread the majority of the above mentioned infectious diseases nor do the species that reside within the British ...
The disease is caused by parasitic worms that are spread to humans through the bite of the black fly. The symptoms include itching so severe that those infected have been known to claw their skin off - or even commit suicide. The disease can also harden the eye tissue, leading to permanent blindness ...
This page includes the following topics and synonyms: Fly Bite, Flies, Black Fly, Simuliidae, Horse Fly, Tabanidae, Deer Fly, Gadfly, Louse Fly, Sand Fly, Phlebotomus, Snipe Fly, Tsetse Fly, Stable Fly.
This research addresses global problems associated with medically important arthropods and arthropod-borne diseases. Current research projects include the ecology of arthropod-borne pathogens; interactions of aquatic insects and their symbiotes; cytogenetics, ecology, and systematics of black flies (Diptera: Simuliidae); medical-veterinary entomology in zoos; and the butterfly proboscis as a model for nanofluidic medical probes.. ...
Peter Adler and Doug Currie made 37 collections of immature black flies from the Thelon River and its tributaries, plus numerous collections of adults. Morphological and chromosomal examination of approximately 4,700 specimens yielded 29 species, matching closely the total number of species (30) collected from the Horton River and its valley. However, only about half of the species (17) are shared between the two drainages. These results suggest that simuliid community structure is far from homogeneous across northern Canada. Collectively, the Horton and Thelon expeditions yielded a total of 42 black fly species far exceeding the 22 species recorded previously from arctic Canada east of the Mackenzie River (cf. Danks 1981).. The 29 species collected from the Thelon Wildlife Sanctuary were divided among 8 genera as follows: Gymnopais (1), Helodon (1), Prosimulium (1), Greniera (1), Stegopterna (2), Cnephia (1), Metacnephia (3) and Simulium s.l. (19). At least one species, a member of the Simulium ...
Wilson, MD; Cheke, RA; Flasse, SPJ; Grist, S; Osei-Ateweneboana, MY; Tetteh-Kumah, A; Fiasorgbor, GK; Jolliffe, FR; Boakye, DA; Hougard, JM; +2 more... (2002) Deforestation and the spatio-temporal distribution of savannah and forest members of the Simulium damnosum complex in southern Ghana and south-western Togo. Transactions of the Royal Society of Tropical Medicine and Hygiene, 96 (6). pp. 632-9. ISSN 0035-9203 DOI: 10.1016/S0035-9203(02)90335-4 Full text not available from this repository ...
Brosimum guianense (Aubl.) Huber, Bol. Mus. Paraense Hist. Nat. 5: 337. 1909; Piratinera guianensis Aubl.. Arboles hasta 40 m de alto; plantas monoicas. Hojas elípticas a obovadas, 4-13 cm de largo y 2-4.5 cm de ancho, ápice agudo a cortamente acuminado, base aguda a obtusa o redondeada, glabras y lustrosas en la haz, puberulentas en el envés; estípulas 2-5 mm de largo, cicatrices rodeando menos de la mitad del tallo. Inflorescencias solitarias, bisexuales, subsésiles o con pedúnculo hasta 20 mm de largo, discoides a hemisféricas, 3-12 mm de diámetro; sépalos estaminados 3-4, connados en la base, estambre 1; flores pistiladas 1-varias. Frutos generalmente drupáceos, 1-1.5 cm de diámetro, rojos cuando maduros.. Rara en bosques perennifolios, zona atlántica; 0-200 m; fl y fr feb-jul; Moreno 23343, 25632; sur de México a Sudamérica. B. costaricanum Liebm. de la costa pacífica de Costa Rica y Panamá, puede identificarse en este sitio de la clave; sin embargo, difiere de B. guianense ...
Following the bite of an infected female black fly (Simulium spp.), a non-fatal filarial disease develops. Fibrous nodules are formed around developing adult worms (female worms reach a length of up to 50 cm) in the subcutaneous tissues, especially of the head and shoulders (America) or the pelvic girdle and lower limbs (Africa). Female worms are viviparous: microfilariae (300 µm long) are mainly found in intercellular spaces in the dermis and in the eye chambers ...
September 2014. Biodiversity and ecology of Culicidae and Simuliidae probable vectors of infectious diseases in villages of the Sanaga mid valley, Cameroon: Influence of the Sanaga River. Most riverine villages of the Sanaga river are known endemic for vector-borne diseases. Two cross sectional surveys were set during two seasons in villages of the Sanaga mid valley to identify main Simuliids and mosquitoes genus and species, their specific biotopes and fluctuations of their abundance with respect to distance from the river banks and seasons. The study villages are located close to 5 and 35 km from the.... Author(s): Kuete Thomas, Nkoa Therese, Tassen Fabien, Baleguel Nkot Pierre and Same-Ekobo Albert, ...
The female can live longer than 30 days with adequate nutrition and displays good searching ability. A mated female lays a single diploid egg in any nymphal stage of the citrus blackfly, but prefers the second stage, and this egg will produce a female. Under laboratory conditions (24°C) the development from egg to adult requires 30 to 35 days. Virgin females lay haploid eggs in the fully developed larva of the E. perplexa female (their own species) and thereby produce males (adelpho-parasite). The sex ratio in the field is about 1:7 (male:female). Encarsia perplexa is hyperparasitized by E. smithi (Silvestri) which was accidentally introduced to Florida by 1979. In Florida, E. perplexa and Amitus hesperidum (Hymenoptera: Platygastidae) coexist. The latter has a high rate of reproduction, and can produce 60 to 70 progeny per female making this species very effective in suppressing high densities of the citrus blackfly. Encarsia perplexa reproduces very slowly, but effectively limits A. woglumi ...
Meet Doctor Neil R Floch. Here are his vitals: Hes board certified, specializing in Surgery with expertise in several areas. He has 17 years experience. The average for this specialty is 21 years. Highly regarded by his patients they rate him 3 out of 4 stars. They point out the time he spends with them. Is affiliated with a top rated hospital. Graduated from highly rated Tufts University. He completed his fellowship at Mayo Clinic in 1998. Doctor Floch is a published author, having articles in peer reviewed journals. His average waiting time is 16 minutes. He accepts new patients. He has a number of insurance plans accepted. Use Vitals.com to examine Doctor Neil R Floch from Norwalk, Connecticut. See patient comments make an appointment or even let us help you to prepare for your visit. Vitals .com where doctors are examined.. ...
Explore. Page 3. We have quite a lot of blackfly on the beans this year so need all the help we can get to keep their numbers down. The ladybirds and hoverflies are doing their best to help. Wishing you joy, peace and fulfillment.
Black flies аrе prevalent thrоughоut mоѕt оf thе world. Black flies аrе rеаllу flies but bесаuѕе оf thеіr small size аnd оthеr behaviors, people dont gene
Yesterday I returned to White Ledge in Albany, NH for the third time this Spring. This time paving on Rt 16 made parking at the campground more convenient. After timing the hike out there after multiple trips I think the campground approach is definitely better (as long as it is open). 1) You dont have…
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With all current CHX based products, the duration of antimicrobial activity is limited. The CHX may be delivered to the site of infection or prevention, but it is highly soluble and is rapidly removed by local fluids such as saliva, tissue fluid or sweat, as well as bathing or abrasion. Obtaining long-term local delivery of CHX is therefore an aspiration in many fields of healthcare. Its broad-spectrum efficacy means that if a CHX-rich environment could be maintained in an area at risk of infection, this could provide a potent protective effect. If applied to an area already colonised by pathogenic microbes, a sustained CHX supply could bring the infection under control as well as provide on-going protection against reinfection. ...
Andreae, M. O., Acevedo, O. C., Araùjo, A., Artaxo, P., Barbosa, C. G. G., Barbosa, H. M. J., Brito, J., Carbone, S., Chi, X., Cintra, B. B. L., da Silva, N. F., Dias, N. L., Dias-Júnior, C. Q., Ditas, F., Ditz, R., Godoi, A. F. L., Godoi, R. H. M., Heimann, M., Hoffmann, T., Kesselmeier, J., Könemann, T., Krüger, M. L., Lavric, J. V., Manzi, A. O., Lopes, A. P., Martins, D. L., Mikhailov, E. F., Moran-Zuloaga, D., Nelson, B. W., Nölscher, A. C., Santos Nogueira, D., Piedade, M. T. F., Pöhlker, C., Pöschl, U., Quesada, C. A., Rizzo, L. V., Ro, C.-U., Ruckteschler, N., Sá, L. D. A., de Oliveira Sá, M., Sales, C. B., dos Santos, R. M. N., Saturno, J., Schöngart, J., Sörgel, M., de Souza, C. M., de Souza, R. A. F., Su, H., Targhetta, N., Tóta, J., Trebs, I., Trumbore, S., van Eijck, A., Walter, D., Wang, Z., Weber, B., Williams, J., Winderlich, J., Wittmann, F., Wolff, S., and Yáñez-Serrano, A. M.: The Amazon Tall Tower Observatory (ATTO): overview of pilot measurements on ecosystem ...
A vector is any arthropod, insect, rodent or other animal of public health significance capable of harboring or transmitting the causative agents of human disease (e.g. malaria, plague) to humans. Under certain circumstances, insects or other arthropods that cause human discomfort or injury, but not disease, are sometimes referred to as vectors. The vectors that Clackamas County Vector Control District controls are mosquitoes and black flies. This is done by using an Integrated Vector Management (IVM) strategy that includes conducting surveillance, controlling sources and vectors, and public education. The result is a healthier community with a lower risk of disease outbreaks.. ...
Fly sprays protect stable & horse from bot, deer, face, horn & black flies, as well as, midges, gnats, mosquitoes & fleas. Shop horse supplies with free shipping offer! Shop in our Fly Control Concentrates department online made by Merck. Shop, sign-up and save, or request your free catalog.
Alexopoulos, C. J., C. W. Mims and M. Blackwell. 1996. Introductory mycology. John Wiley and Sons, New York.. Benny, G. L., R. A. Humber and J. B. Morton. 2001. Zygomycota: Zygomycetes. Pp. 113-146. In: The Mycota VII. Systematics and Evolution. Part A. (McLaughlin, D. J., McLaughlin, E. G. and Lemke, P. A., eds.). Springer-Verlag, New York.. Benny G. L. and K. ODonnell. 2000. Amoebidium parasiticum is a protozoan, not a Trichomycete. Mycologia 92: 1133-1137.. Berbee, M. L. and J. W. Taylor. 2001. Fungal molecular evolution: gene trees and geologic time. Pp. 229-245. In: The Mycota VII. Systematics and Evolution. Part B. (McLaughlin, D. J., McLaughlin, E. G. and Lemke, P. A., eds.). Springer-Verlag, New York.. Berbee, M. L. and J. W. Taylor. 1993. Dating the evolutionary radiations of the true fungi. Can. J. Bot. 71: 1114-1127.. Bidochka, M. J., S. R. A. Walsh, M. E. Ramos, R. J. St. Leger, J. C. Silver and D. W. Roberts. 1996. Fate of biological control introductions: monitoring an Australian ...
Blackfly & Greenfly. Very common on all types of plants. Colonies are visible around new buds or shoots in particular. Leaves may twist or yellow. Sticky honeydew can cause subsequent growth of black Sooty Mould. Product solution: Provado Ultimate Bug Killer ready to use/concentrate/aerosol, Organic Bug Free, Provado Ultimate Fruit and Vegetable Bug Killer ready to use/concentrate, Sprayday Greenfly Killer, Greenhouse Fly Catchers ...
The white flecks are dead aphids (blackfly) and he black flecks are the live ones. Blast them off with the spray attachment on a hose. If you hang a bird feeder nearby, you may attract tits etc which will eat them for you.. Last edited: 28 May 2017 18:23:24. ...
Blackfly and  Greenfly (aphids) are very common sap sucking pests affecting nearly all types of plants. Colonies are visible around new buds or shoots in spring onwards. Leaves may twist or yellow and become puckered and distorted as they develop.
Macaulay Library ML77947641; Greater Pewee; Contopus pertinax; © Nina Rach cc; Bear Creek Park (UTC 097), Harris, Texas, United States; 11 Dec 2017
E. Faure, M. Campana, R. Cunderlik, O. Drblikova, L. Duloquin, R. Keller, B. Lombardot, C. Melani, M. Remesikova, B. Rizzi, T. Savy, G. Recher, C. Zanella, J. Kollar, D. Fabrèges, P. Villoutreix, J. Delile, P. Affaticati, B. Maury, A. Boyreau, I. Colin, S. Desnoulez, J. Nief, P. Calvat, P. Vernier, M. Frain, G. Lutfalla, P. Suret, R. Doursat, A. Sarti, K. Mikula, N. Peyriéras, P. Bourgine,"A workflow to process 3D+time microscopy images of developing organisms and reconstruct their cell lineage", Nature Methods, 7, 2016. ...
To study the impact of mass Mectizan treatment on Onchocerca volvulus transmission in Mexico, entomological surveys were carried out in the endemic foci of Oaxaca, Southern Chiapas, and Northern Chiapas. Collected flies were screened by polymerase chain reaction (PCR) for O. volvulus parasites. The prevalence of infected and infective flies was estimated using the PoolScreen algorithm and with a novel probability-based method. O. volvulus infective larvae were not detected in flies from 6/13 communities. In 7/13 communities, infective flies were detected, with prevalences ranging from 1.6/10,000 to 29.0/10,000 and seasonal transmission potentials ranging from 0.4 to 3.3. Infected and infective flies were found in a community in Northern Chiapas, suggesting that, according to World Health Organization criteria, autochthonous transmission exists in this focus. These data suggest that O. volvulus transmission in Mexico has been suppressed or brought to a level that may be insufficient to sustain the
Mansfield Aders Scholarship: Awarded tuition fees to study a masters degree at the London School of Hygiene & Tropical Medicine (2011).. Conferences and Presentations. 10th European Congress on Tropical Medicine and International Health (ECTMIH), 2017. Antwerp, Belgium. "The blackfly vectors and transmission of Onchocerca volvulus in Mahenge, south eastern Tanzania." Oral presentation. 10th European Congress on Tropical Medicine and International Health (ECTMIH), 2017. Antwerp, Belgium. "Esperanza Window Traps for the collection of anthropophilic blackflies (Diptera: Simuliidae) in Uganda and Tanzania." Poster presentation. 1st International Workshop on Onchocerciasis Associated Epilepsy (OAE), 2017. Antwerp, Belgium. "Blackfly ecology and O. volvulus transmission in Uganda, Tanzania and Cameroon." Oral presentation. 1st International Workshop on Onchocerciasis Associated Epilepsy (OAE), 2017. Antwerp, Belgium. "The blackfly vectors and transmission of Onchocerca volvulus in Mahenge, south ...
Abstract A quantitative description of the transmission dynamics of onchocerciasis on the Firestone Rubber Plantation, Harbel, Liberia is presented. The putative vector, Simulium yahense, comprised 98.5% of the flies examined. Diurnal vector-host contact was unimodal, expressing a distinct peak between 0800 and 1100 hours, particularly during the wet season. Perennial breeding occurs in the Firestone biotope, and is manifested by a mean annual daily landing rate of 75 flies per person per day. S. yahense is considered an efficient vector by nature of its anthropophily, moderate infective worm burden (4.3 infective larvae per infective fly) and its spatial and temporal ubiquitousness. Onchocerciasis transmission peaked during the dry season, when 73.5% of the annual transmission occurred. The mean annual transmission potential for the study area was estimated to be 1,425 infective larvae per person. The significance of onchocerciasis as a public health problem on the Plantation is discussed, and the
TY - JOUR. T1 - Hematophagous diptera collected from a horse and paired carbon dioxide-baited suction trap in southern California. T2 - Relevance to West Nile virus epizootiology. AU - Gerry, Alec C.. AU - Nawaey, Tamim M.. AU - Sanghrajka, Parag B.. AU - Wisniewska, Joanna. AU - Hullinger, Pam. PY - 2008/1/1. Y1 - 2008/1/1. N2 - Hematophagous Diptera landing on a horse were removed by vacuum, and their numbers were related to a paired carbon dioxide-baited suction trap at three locations in southern California where West Nile virus activity was high during the preceding year. Insects collected from the horse included mosquitoes (nine species), biting midges (Culicoides sonorensis Wirth & Jones), and black flies (Simulium bivittatum Malloch). Mosquitoes were predominantly collected from the head, crest, withers, neck, chest, and shoulders of the horse, whereas biting midges and black flies were predominantly collected from the ventral midline of the horse. Culex erythrothorax Dyar was by far the ...
River Blindness, also known as Onchocerciasis, is caused by the Onchocerca volvulus worm which is transmitted from person to person by daytime biting infected blackflies belonging to the genus Simulium damnosum. Infective larval worms (microfilariae) develop in the blackfly and once injected into humans through a blood meal, the worms form nodules, reproduce, and migrate to subcutaneous tissue where they can be ingested by blackflies to continue the infectious cycle. The intensity of the illness is related to the number of bites sustained. River Blindness is a Neglected Tropical Disease (NTD)*.. * Neglected Tropical Diseases are chronic infections that are typically endemic in low income countries. They prevent affected adults and children from going to school, working, or fully participating in community life, contributing to stigma and the cycle of poverty. ...
Molloy, D.P., Hannon, B.H., 1985. Diptera (Simuliidae), in: Webb, D.W. (Ed.), Current And Selected Bibliographies On Benthic Biology, 1984. North American Benthology Society, Illinois Natural History Survey, Champaign, Illinois, pp. 33-40 ...
From May 1964 to March 1966 extensive collections of black flies were made by Prof. A.S. Montchadsky (Zoological Institute, Acad. Sci., USSR), Prof. J. Weiser (CSSR) and I. Garcia Avila in Cuba and Pinos Island. In this material 4 species were found namely Psilopelmia antillarum (Jennings), Ps. ochraceum (Walker), Ps. quadrivittatum (Loew) and Ps. haematopotum (Malloch). Among females attracted to man Ps. quadrivittatum was most frequently encountered, whereas Ps. haematopotum attacks rather seldom. In Cuba all the species are represented by the forms more or less distinct from the continental ones. Out of these species Ps. quadrivittatum and Ps. haematopotum differ not only in meristic but also in some other taxonomic characters: the structure of genitalia, head and rectal appendages of larvae, etc. The keys for the identification of all developmental stages of the above species and figures of larvae, pupae and adults are given ...
Ecology of Onchocerca volvulus:. O. volvulus cannot survive in the outside environment; therefore it constantly remains within a host, whether it be the black fly or a human. This parasite causes no harm to the intermediate host and only causes harm to its primary host after the parasites death. Upon dying the parasite causes inflammation in various areas of the human body, producing nodules that protrude from the skin. This inflammatory response also causes damage to the optical nerves, causing blindness, which is the origin of the diseases name. As previously stated, there is no preventative vaccine or cure for the disease caused by this parasite, but medicine can be taken to temporarily alleviate the pain. [2]. An example of Onchcerca volvulus tranmission and relation to slavery:. O. volvulus is transmitted from human to human through the bites of black flies. Although the majority of the infections still occur in Western and Central Africa, the parasite and the debilitating disease it ...
FIGURE 12.3 External anatomy of mosquito larvae, dorsal view, with anal segment and siphon at posterior end rotated to provide better view. A Anopheline form