Records |
Author |
Ulloa, A.; Gonzalez-Ceron, L.; Rodriguez, M.H. |
Title |
Host selection and gonotrophic cycle length of Anopheles punctimacula in southern Mexico |
Type |
Journal Article |
Year |
2006 |
Publication |
Journal of the American Mosquito Control Association |
Abbreviated Journal |
J Am Mosq Control Assoc |
Volume |
22 |
Issue |
4 |
Pages |
648-653 |
Keywords |
Animals; Anopheles/*physiology; Appetitive Behavior/*physiology; Cattle; Female; Horses; Humans; Insect Vectors/*physiology; Malaria/transmission; Mexico; Oviparity/*physiology; Seasons; Time Factors; Vitellogenesis/physiology |
Abstract |
The host preference, survival rates, and length of the gonotrophic cycle of Anopheles punctimacula was investigated in southern Mexico. Mosquitoes were collected in 15-day separate experiments during the rainy and dry seasons. Daily changes in the parous-nulliparous ratio were recorded and the gonotrophic cycle length was estimated by a time series analysis. Anopheles punctimacula was most abundant during the dry season and preferred animals to humans. The daily survival rate in mosquitoes collected in animal traps was 0.96 (parity rate = 0.86; gonotrophic cycle = 4 days). The length of gonotrophic cycle of 4 days was estimated on the base of a high correlation coefficient value appearing every 4 days. The minimum time estimated for developing mature eggs after blood feeding was 72 h. The proportion of mosquitoes living enough to transmit Plasmodium vivax malaria during the dry season was 0.35. |
Address |
Centro de Investigacion de Paludismo, Instituto Nacional de Salud Publica, Apartado Postal 537, Tapachula, Chiapas 30700, Mexico |
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English |
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ISSN |
8756-971X |
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Notes |
PMID:17304932 |
Approved |
no |
Call Number |
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Serial |
1830 |
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Author |
Loyola, E.G.; Rodriguez, M.H.; Gonzalez, L.; Arredondo, J.I.; Bown, D.N.; Vaca, M.A. |
Title |
Effect of indoor residual spraying of DDT and bendiocarb on the feeding patterns of Anopheles pseudopunctipennis in Mexico |
Type |
Journal Article |
Year |
1990 |
Publication |
Journal of the American Mosquito Control Association |
Abbreviated Journal |
J Am Mosq Control Assoc |
Volume |
6 |
Issue |
4 |
Pages |
635-640 |
Keywords |
Animals; Anopheles/*physiology; *Carbamates; Cattle; *Ddt; Ecology; Enzyme-Linked Immunosorbent Assay; Feeding Behavior/*drug effects; Horses; Humans; Insect Vectors; Insecticide Resistance; *Insecticides; Mexico; *Phenylcarbamates; Seasons |
Abstract |
Intense and persistent use of DDT for malaria control has increased resistance and induced exophilic behavior of Anopheles pseudopunctipennis. An evaluation of bendiocarb and DDT to control this species in Sinaloa, Mexico, showed that, in spite of DDT-resistance, both insecticides produced similar effects. Feeding patterns were analyzed to explain these results. Resting mosquitoes were collected over the dry and wet seasons. Anophelines were tested in an ELISA to determine the source of the meals. The human blood index (HBI) ranged from 3.3 to 6.8% in DDT- and from 12.7 to 26.9% in bendiocarb-sprayed houses. Irritability and repellency in DDT-sprayed houses could explain the reduced HBI. In contrast, bendiocarb produced higher mortality. These effects could have affected different components of the vectorial capacity and similarly reduced malaria. |
Address |
Center for Malaria Research, Chiapas, Mexico |
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English |
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ISSN |
8756-971X |
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Conference |
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Notes |
PMID:2098469 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2671 |
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Author |
Crans, W.J.; McNelly, J.; Schulze, T.L.; Main, A. |
Title |
Isolation of eastern equine encephalitis virus from Aedes sollicitans during an epizootic in southern New Jersey |
Type |
Journal Article |
Year |
1986 |
Publication |
Journal of the American Mosquito Control Association |
Abbreviated Journal |
J Am Mosq Control Assoc |
Volume |
2 |
Issue |
1 |
Pages |
68-72 |
Keywords |
Aedes/*microbiology; Alphavirus/*isolation & purification; Animals; Disease Outbreaks/veterinary; Ecology; Encephalitis Virus, Eastern Equine/*isolation & purification; Encephalomyelitis, Equine/epidemiology/transmission/veterinary; Horse Diseases/epidemiology/transmission; Horses; Insect Vectors/microbiology; New Jersey |
Abstract |
Eastern equine encephalitis virus (EEE) was isolated from the salt marsh mosquito, Aedes sollicitans, collected from coastal areas of New Jersey on 3 occasions during the late summer and fall of 1982. The isolations were made at a time when local Culiseta melanura were either undergoing a population increase or exhibiting high levels of EEE virus. Although no human cases were reported during the epizootic period, the data lend support to the hypothesis that Ae. sollicitans is capable of functioning as an epidemic vector in the coastal areas of New Jersey where human cases of EEE have been most common. |
Address |
Mosquito Research and Control, Cook College, Rutgers University, New Brunswick, NJ 08903 |
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English |
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Edition |
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ISSN |
8756-971X |
ISBN |
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Area |
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Conference |
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Notes |
PMID:2853203 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2684 |
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Author |
Mitchell, C.J.; Darsie, R.F.J.; Monath, T.P.; Sabattini, M.S.; Daffner, J. |
Title |
The use of an animal-baited net trap for collecting mosquitoes during western equine encephalitis investigations in Argentina |
Type |
Journal Article |
Year |
1985 |
Publication |
Journal of the American Mosquito Control Association |
Abbreviated Journal |
J Am Mosq Control Assoc |
Volume |
1 |
Issue |
1 |
Pages |
43-47 |
Keywords |
Animals; Argentina; *Culicidae/classification; Disease Outbreaks/veterinary; Encephalitis Virus, Western Equine; Encephalomyelitis, Equine/transmission/*veterinary; Entomology/*instrumentation; Equipment Design; Horse Diseases/*transmission; Horses; *Insect Vectors; Population Surveillance |
Abstract |
A large net trap was used to sample mosquito populations attracted to horses at three sites each in Santa Fe and Rio Negro Provinces, Argentina, during the austral summer of 1984. These provinces, as well as others in Argentina, were affected by a severe epizootic of western equine encephalitis (WEE) during 1982-83. Totals of 2,752 and 6,929 mosquitoes were collected in Santa Fe and Rio Negro Provinces during five and three trap nights, respectively. Culex mosquitoes of the subgenus Culex were predominant (45.8% of total) in the Santa Fe collections, although Aedes albifasciatus also was prevalent (21.7%). The latter species was predominant (95.7% of total) in the Rio Negro collections. The mosquito fauna was less complex (minimum of 6 species) in Rio Negro Province as compared to Santa Fe Province (minimum of 18 species). The advantages of the net trap indicate that this trap can become a useful tool in arbovirus ecology studies in other areas. |
Address |
Division of Vector-Borne Viral Diseases, Centers for Disease Control, Fort Collins, CO 80522-2087 |
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English |
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Edition |
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ISSN |
8756-971X |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:2906656 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2686 |
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Author |
Sanchez-Vizcaino, J.M. |
Title |
Control and eradication of African horse sickness with vaccine |
Type |
Journal Article |
Year |
2004 |
Publication |
Developments in Biologicals |
Abbreviated Journal |
Dev Biol (Basel) |
Volume |
119 |
Issue |
|
Pages |
255-258 |
Keywords |
African Horse Sickness/epidemiology/*prevention & control; African horse sickness virus/immunology; Animals; Disease Outbreaks/veterinary; Equidae/*virology; Horses; Insect Control; Insect Vectors/virology; Spain/epidemiology; Viral Vaccines/*administration & dosage |
Abstract |
African horse sickness (AHS) is an infectious but no-contagious viral disease of equidae with high mortality in horses. The disease is caused by an arthropod-borne double-stranded RNA virus within the genus Orbivirus of the family Reoviridae transmitted by at least two species of Culicoides. Nine different serotypes have been described. The nine serotypes of AHS have been described in eastern and southern Africa. Only AHS serotypes 9 and 4 have been found in West Africa from where they occasionally spread into countries surrounding the Mediterranean. Examples of outbreaks that have occurred outside Africa are: in the Middle East (1959-1963), in Spain (serotype 9, 1966, serotype 4, 1987-1990), and in Portugal (serotype 4, 1989) and Morocco (serotype 4, 1989-1991). Laboratory diagnosis of AHS is essential. Although the clinical signs and lesions are characteristic, they can be confused with those of other diseases. Several techniques have been adapted for the detection of RNA segments, antibodies and antigen. Two types of vaccines have been described for AHS virus. Attenuated live vaccines (monovalent and polyvalent) for use in horses, mules and donkeys, are currently available, as well as a monovalent, serotype 4, inactivated vaccine, produced commercially but no longer available. New vaccines, including a subunit vaccine, have been evaluated experimentally. In this paper a review of the last AHS outbreaks in Spain, occurring during 1987-1990, and affecting the central and south part of the country, is presented. The role that vaccination played for the control and eradication of the disease, as well as other aspects such as climatological conditions, number of vectors and horse management, are also presented and evaluated. |
Address |
Facultad de Veterinaria, Universidad Complutense, Madrid, Spain. jmvizcaino@vet.ucm.es |
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English |
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Edition |
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ISSN |
1424-6074 |
ISBN |
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Medium |
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Notes |
PMID:15742636 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2357 |
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Author |
Sinclair, M.; Buhrmann, G.; Gummow, B. |
Title |
An epidemiological investigation of the African horsesickness outbreak in the Western Cape Province of South Africa in 2004 and its relevance to the current equine export protocol |
Type |
Journal Article |
Year |
2006 |
Publication |
Journal of the South African Veterinary Association |
Abbreviated Journal |
J S Afr Vet Assoc |
Volume |
77 |
Issue |
4 |
Pages |
191-196 |
Keywords |
African Horse Sickness/diagnosis/*epidemiology; African horse sickness virus/*isolation & purification; Animals; Ceratopogonidae/virology; Diagnosis, Differential; Disease Outbreaks/*veterinary; Female; Horses; Insect Vectors/virology; Male; Prevalence; Retrospective Studies; Sentinel Surveillance; South Africa/epidemiology; Viral Vaccines/administration & dosage |
Abstract |
African Horsesickness (AHS) is a controlled disease in South Africa. The country is divided into an infected area and a control area. An outbreak of AHS in the control area can result in a ban of exports for at least 2 years. A retrospective epidemiological study was carried out on data collected during the 2004 AHS outbreak in the surveillance zone of the AHS control area in the Western Cape Province. The objective of this study was to describe the 2004 outbreak and compare it with the 1999 AHS outbreak in the same area. As part of the investigation, a questionnaire survey was conducted in the 30 km radius surrounding the index case. Spatial, temporal and population patterns for the outbreak are described. The investigation found that the outbreak occurred before any significant rainfall and that the main AHS vector (Culicoides imicola) was present in abundance during the outbreak. Furthermore, 63% of cases occurred at temperatures < or = 15 degrees C, the Eerste River Valley was a high risk area, only 17% of owners used vector protection as a control measure and 70% of horses in the outbreak area were protected by means of vaccination at the start of the outbreak. The study revealed that the current AHS control measures do not function optimally because of the high percentage of vaccinated horses in the surveillance zone, which results in insufficient sentinel animals and the consequent failure of the early warning system. Alternative options for control that allow continued export are discussed in the paper. |
Address |
State Veterinarian Epidemiology, Elsenburg, South Africa. marnas@elsenburg.com |
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English |
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Edition |
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ISSN |
1019-9128 |
ISBN |
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Conference |
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Notes |
PMID:17458343 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2354 |
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Author |
Mellor, P.S.; Hamblin, C. |
Title |
African horse sickness |
Type |
Journal Article |
Year |
2004 |
Publication |
Veterinary Research |
Abbreviated Journal |
Vet Res |
Volume |
35 |
Issue |
4 |
Pages |
445-466 |
Keywords |
African Horse Sickness/epidemiology/*prevention & control/*transmission/virology; African horse sickness virus/pathogenicity; Animals; Culicidae; Europe/epidemiology; Horses; Insect Vectors |
Abstract |
African horse sickness virus (AHSV) causes a non-contagious, infectious insect-borne disease of equids and is endemic in many areas of sub-Saharan Africa and possibly Yemen in the Arabian Peninsula. However, periodically the virus makes excursions beyond its endemic areas and has at times extended as far as India and Pakistan in the east and Spain and Portugal in the west. The vectors are certain species of Culicoides biting midge the most important of which is the Afro-Asiatic species C. imicola. This paper describes the effects that AHSV has on its equid hosts, aspects of its epidemiology, and present and future prospects for control. The distribution of AHSV seems to be governed by a number of factors including the efficiency of control measures, the presence or absence of a long term vertebrate reservoir and, most importantly, the prevalence and seasonal incidence of the major vector which is controlled by climate. However, with the advent of climate-change the major vector, C. imicola, has now significantly extended its range northwards to include much of Portugal, Spain, Italy and Greece and has even been recorded from southern Switzerland. Furthermore, in many of these new locations the insect is present and active throughout the entire year. With the related bluetongue virus, which utilises the same vector species of Culicoides this has, since 1998, precipitated the worst outbreaks of bluetongue disease ever recorded with the virus extending further north in Europe than ever before and apparently becoming endemic in that continent. The prospects for similar changes in the epidemiology and distribution of AHSV are discussed. |
Address |
Institute for Animal Health, Department of Arbovirology, Pirbright Laboratory, Ash Rd., Pirbright, Woking, Surrey, GU24 0NF, United Kingdom. philip.mellor@bbsrc.ac.uk |
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English |
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Series Volume |
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Edition |
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ISSN |
0928-4249 |
ISBN |
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Conference |
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Notes |
PMID:15236676 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2358 |
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Author |
Mellor, P.S. |
Title |
African horse sickness: transmission and epidemiology |
Type |
Journal Article |
Year |
1993 |
Publication |
Veterinary Research |
Abbreviated Journal |
Vet Res |
Volume |
24 |
Issue |
2 |
Pages |
199-212 |
Keywords |
Africa, Northern/epidemiology; African Horse Sickness/epidemiology/*transmission; African horse sickness virus/*physiology; Animals; Arachnid Vectors/microbiology; Ceratopogonidae/*microbiology; Culicidae/microbiology; Horses; Insect Vectors/*microbiology; Portugal/epidemiology; Spain/epidemiology; Ticks/microbiology |
Abstract |
African horse sickness (AHS) virus causes a non-contagious, infectious, arthropod-borne disease of equines and occasionally of dogs. The virus is widely distributed across sub-Saharan African where it is transmitted between susceptible vertebrate hosts by the vectors. These are usually considered to be species of Culicoides biting midges but mosquitoes and/or ticks may also be involved to a greater or lesser extent. Periodically the virus makes excursions beyond its sub-Saharan enzootic zones but until recently does not appear to have been able to maintain itself outside these areas for more than 2-3 consecutive years at most. This is probably due to a number of factors including the apparent absence of a long term vertebrate reservoir, the prevalence and seasonal incidence of the vectors and the efficiency of control measures (vaccination and vector abatement). The recent AHS epizootics in Iberia and N Africa spanning as they do, 5 or more yr, seem to have established a new pattern in AHS virus persistence. This is probably linked to the continuous presence of adult C imicola in the area. Culicoides imicola is basically an Afro-Asiatic insect and prefers warm climates. Therefore its continuous adult presence in parts of Iberia and N Africa may be due to some recent moderations of the climate in these areas. |
Address |
Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, UK |
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English |
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Edition |
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ISSN |
0928-4249 |
ISBN |
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Conference |
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Notes |
PMID:8102076 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2359 |
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Author |
Traversa, D.; Otranto, D.; Iorio, R.; Giangaspero, A. |
Title |
Molecular characterization of Thelazia lacrymalis (Nematoda, Spirurida) affecting equids: a tool for vector identification |
Type |
Journal Article |
Year |
2005 |
Publication |
Molecular and Cellular Probes |
Abbreviated Journal |
Mol Cell Probes |
Volume |
19 |
Issue |
4 |
Pages |
245-249 |
Keywords |
Animals; Horse Diseases/parasitology; Horses/*parasitology; Insect Vectors/*parasitology; Muscidae/*parasitology; Polymerase Chain Reaction; Polymorphism, Restriction Fragment Length; Spirurida Infections/parasitology/veterinary; Thelazioidea/chemistry/*genetics |
Abstract |
Equine thelaziosis caused by the eyeworm Thelazia lacrymalis is a parasitic disease transmitted by muscid flies. Although equine thelaziosis is known to have worldwide distribution, information on the epidemiology and presence of the intermediate hosts of T. lacrymalis is lacking. In the present work, a PCR-RFLP based assay on the first and/or second internal transcribed spacer (ITS1 and ITS2) of ribosomal DNA was developed for the detection of T. lacrymalis DNA in its putative vector(s). The sensitivity of the technique was also assessed. The restriction patterns obtained readily differentiated T. lacrymalis from four species of Musca (Diptera, Muscidae) (i.e. Musca autumnalis, Musca domestica, Musca larvipara and Musca osiris), which are potential vectors of equine eyeworms. The molecular assay presented herein is a useful tool to identify the intermediate host(s) of T. lacrymalis in natural conditions and to study its/their ecology and epidemiology. |
Address |
Department of Biomedical Comparative Sciences, Faculty of Veterinary Medicine, University of Teramo, Piazza Aldo Moro 45, 64100 Teramo, Italy. dtraversa@unite.it |
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English |
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Edition |
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ISSN |
0890-8508 |
ISBN |
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Notes |
PMID:16038792 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2626 |
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Author |
Valero, N. |
Title |
West Nile virus: a new challenge? |
Type |
Journal Article |
Year |
2003 |
Publication |
Investigacion Clinica |
Abbreviated Journal |
Invest Clin |
Volume |
44 |
Issue |
3 |
Pages |
175-177 |
Keywords |
Animal Migration; Animals; Bird Diseases/virology; Birds; Caribbean Region; Central America; Culex/virology; Horse Diseases/virology; Horses; Humans; Insect Vectors/virology; North America/epidemiology; South America; West Nile Fever/*epidemiology/transmission/veterinary; West Nile virus/*physiology |
Abstract |
West Nile Virus (WNV), a member of the family Flaviviridae, was first isolated in 1937. Since the original isolation of the WNV outbreaks have occurred with increase in frequency of cases in humans and horses, apparent increase in severe human disease and high avian death rates. In 1999, 2000 and 2002 outbreaks of the WNV encephalitis were reported in horses, birds and humans from New York and Canada. Ornithophilic mosquitoes are the principal vectors of the WNV and birds of several species chiefly migrants appear to be the major introductory or amplifying host. The pattern of outbreaks in the old and new world suggests that viremic migratory birds may also contribute to movement of the virus. If so, Central America, Caribbean Islands and countries of South America including Venezuela, are in potential risk for suffering a severe outbreak for WNV, since several species of birds have populations that pass trough New York and cross the western north Atlantic or Caribbean Sea. It is important the knowledge of the ecology of WNV as well of the efficacy of control efforts in order to minimize the public health impact in these countries, where all population is susceptible to this infection. |
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Spanish |
Summary Language |
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Original Title |
Virus del Nilo Occidental: Un nuevo reto? |
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Edition |
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ISSN |
0535-5133 |
ISBN |
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Notes |
PMID:14552056 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2640 |
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