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Author |
Sudia, W.D.; Fernandez, L.; Newhouse, V.F.; Sanz, R.; Calisher, C.H. |
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Title  |
Arbovirus vector ecology studies in Mexico during the 1972 Venezuelan equine encephalitis outbreak |
Type |
Journal Article |
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Year |
1975 |
Publication |
American Journal of Epidemiology |
Abbreviated Journal |
Am J Epidemiol |
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Volume |
101 |
Issue |
1 |
Pages |
51-58 |
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Keywords |
Animals; Arboviruses/isolation & purification; Culicidae/microbiology; Disease Vectors/*microbiology; Ecology; Encephalitis Virus, St. Louis/isolation & purification; Encephalitis Virus, Venezuelan Equine/*isolation & purification; Encephalitis Virus, Western Equine/isolation & purification; Encephalomyelitis, Equine/epidemiology/*transmission/veterinary; Horse Diseases/epidemiology/*transmission; Horses; Insect Vectors/microbiology; Mexico |
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Abstract |
Virus vector studies were conducted in the States of Durango, Chihuahua, and Tamaulipas, Mexico, in June and July 1972. Apparently only a low level of Venzuelan equine encephalitis (VEE) virus transmission to equines occured at the time of the study, and the infection was restricted to areas which had not experienced overt activity during the preceding year. The low level of infection was associated with a scarcity of mosquitoes. The IB (epidemic) strain of VEE virus was isolated from two pools of Anopheles pseudopunctipennis (Theo.) and the blood of one symptomatic equine. The low mosquito population, the relatively few equine cases observed, and the absence of reports of VEE human disease from the outbreak area suggested VEE virus persistence through a low-level mosquito-equine transmission cycle. Other studies have already indicated that wild vertebrates play no more than a minor role in outbreaks of epidemic VEE. Mosquito collections made in areas of the states of Durango, Chihuahua, and Tamaulipas, where considerable epidemic activity of VEE had occurred in 1971, failed to reveal evidence of VEE virus persistence. Twenty-nine ioslations of other arboviruses were also made in these studies: including 22 of St. Louis encephalitis virus (SLE), 2 of Flanders virus, 1 of Turlock virus, 1 of Trivittatus virus of the California Group, 1 of western equine encephalitis virus (VEE), and 2 (from Santa Rose) which possibly represent a hitherto unknown virus in the Bunyamwera Group. These are the first reports of SLE virus isolations from mosquitoes in Mexico, and the first demonstration of Trivittatus, VEE Turlock and Flanders viruses in Mexico from any source. |
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English |
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0002-9262 |
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Notes |
PMID:235213 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2706 |
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Author |
Muscatello, G.; Anderson, G.A.; Gilkerson, J.R.; Browning, G.F. |
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Title |
Associations between the ecology of virulent Rhodococcus equi and the epidemiology of R. equi pneumonia on Australian thoroughbred farms |
Type |
Journal Article |
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Year |
2006 |
Publication |
Applied and Environmental Microbiology |
Abbreviated Journal |
Appl Environ Microbiol |
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Volume |
72 |
Issue |
9 |
Pages |
6152-6160 |
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Keywords |
Actinomycetales Infections/epidemiology/microbiology/*veterinary; Air Microbiology; Animal Husbandry; Animals; Animals, Newborn; Australia/epidemiology; Colony Count, Microbial; DNA, Bacterial/genetics; Ecosystem; Horse Diseases/epidemiology/*microbiology; Horses; Pneumonia, Bacterial/epidemiology/microbiology/*veterinary; Rhodococcus equi/genetics/isolation & purification/*pathogenicity; Soil Microbiology; Virulence |
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Abstract |
The ecology of virulent strains of Rhodococcus equi on horse farms is likely to influence the prevalence and severity of R. equi pneumonia in foals. This study examined the association between the ecology of virulent R. equi and the epidemiology of R. equi pneumonia by collecting air and soil samples over two breeding seasons (28 farm-year combinations) on Thoroughbred breeding farms with different reported prevalences of R. equi pneumonia. Colony blotting and DNA hybridization were used to detect and measure concentrations of virulent R. equi. The prevalence of R. equi pneumonia was associated with the airborne burden of virulent R. equi (both the concentration and the proportion of R. equi bacteria that were virulent) but was not associated with the burden of virulent R. equi in the soil. Univariable screening and multivariable model building were used to evaluate the effect of environmental and management factors on virulent R. equi burdens. Lower soil moisture concentrations and lower pasture heights were significantly associated with elevated airborne concentrations of virulent R. equi, as were the holding pens and lanes, which typically were sandy, dry, and devoid of pasture cover. Few variables appeared to influence concentrations of virulent R. equi in soil. Acidic soil conditions may have contributed to an elevated proportion of virulent strains within the R. equi population. Environmental management strategies that aim to reduce the level of exposure of susceptible foals to airborne virulent R. equi are most likely to reduce the impact of R. equi pneumonia on endemically affected farms. |
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School of Veterinary Science, The University of Melbourne, Parkville, Victoria 3010, Australia. mug@unimelb.edu.au |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0099-2240 |
ISBN |
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Expedition |
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Notes |
PMID:16957241 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2622 |
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Author |
Holbrook, A.A. |
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Title |
Biology of equine piroplasmosis |
Type |
Journal Article |
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Year |
1969 |
Publication |
Journal of the American Veterinary Medical Association |
Abbreviated Journal |
J Am Vet Med Assoc |
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Volume |
155 |
Issue |
2 |
Pages |
453-454 |
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Keywords |
Animals; Arthropod Vectors; Babesiosis/*epidemiology; Ecology; Epidemiology; Florida; Horse Diseases/*epidemiology; Horses; Ticks |
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English |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0003-1488 |
ISBN |
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Expedition |
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Notes |
PMID:5816130 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2740 |
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Author |
Pinchbeck, G.L.; Clegg, P.D.; Proudman, C.J.; Morgan, K.L.; French, N.P. |
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Title |
Case-control investigation of the factors affecting the risk of horses falling during steeplechase racing in the UK |
Type |
Journal Article |
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Year |
2004 |
Publication |
The Veterinary Record |
Abbreviated Journal |
Vet. Rec. |
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Volume |
155 |
Issue |
1 |
Pages |
11-15 |
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Keywords |
Accidental Falls/*prevention & control/*statistics & numerical data; Animals; Athletic Injuries/epidemiology/etiology/prevention & control/*veterinary; Case-Control Studies; England/epidemiology; Horses/*injuries; Risk Factors; Running/*injuries |
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Abstract |
A concurrent case-control study of 12 UK racecourses was made between March 1, 2000, and August 31, 2001, to identify and quantify the factors associated with the risk of horses falling in steeplechase races. Cases were defined as a jumping effort at a steeplechase fence that resulted in a fall and controls were defined as a successful jumping effort over any steeplechase fence at any of the 12 racecourses within 14 days before or after the case fall. Information on the horse, the jockey and the race were collected and all the fences on all the courses were surveyed. Conditional logistic regression was used to examine the relationships between the predictor variables and the risk of falling. There was one fall per 254 jumping efforts. The risk of a horse falling decreased the more times it had raced on a particular racecourse. The number of fences, the distance from the previous fence and the nature of the previous fence also affected the risk of falling. If the previous fence was a water jump the risk of falling increased; fences that were sited on flat or slight uphill gradients (up to approximately 1 in 25) were associated with a lower risk of horses falling than downhill fences, and higher takeoff boards were associated with a higher risk of falling. |
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Address |
Department of Veterinary Clinical Science, University of Liverpool, Leahurst, Neston CH64 7TE |
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English |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0042-4900 |
ISBN |
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Expedition |
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Conference |
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Notes |
PMID:15264483 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3773 |
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Author |
Pinchbeck, G.L.; Clegg, P.D.; Proudman, C.J.; Morgan, K.L.; French, N.P. |
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Title |
Case-control study to investigate risk factors for horse falls in hurdle racing in England and Wales |
Type |
Journal Article |
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Year |
2003 |
Publication |
The Veterinary Record |
Abbreviated Journal |
Vet. Rec. |
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Volume |
152 |
Issue |
19 |
Pages |
583-587 |
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Keywords |
Accidental Falls/*statistics & numerical data; Animals; Athletic Injuries/epidemiology/etiology/*veterinary; Case-Control Studies; England/epidemiology; Horses/*injuries; Risk Factors; Running/injuries; Wales/epidemiology |
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Abstract |
Between March 1, 2000 and August 31, 2001, a case-control study was conducted on 12 racecourses in England and Wales to identify and quantify the risk factors associated with horse falls in hurdle races. The cases and controls were defined so that variables relating to the horse, the jockey, the race and racecourse, and the jump could be considered. The cases were defined as a jumping effort at a hurdle flight that resulted in a fall, and the controls were defined as a successful jump over a hurdle at any of the 12 racecourses within 14 days before or after the case fall. Conditional logistic regression was used to examine the univariable and multivariable relationships between the predictor variables and the risk of falling. The risk of falling was significantly associated with the position of the jump in the race, and with the distance and speed of the race. A horse's previous racing experience and history were also significantly associated with the risk of falling and horses participating in their first hurdle race were at almost five times greater risk of falling than horses that had hurdled before. |
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Address |
Epidemiology Group, Department of Veterinary Clinical Science and Animal Husbandry, University of Liverpool, Leahurst, Neston CH64 7TE |
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English |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0042-4900 |
ISBN |
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Conference |
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Notes |
PMID:12762486 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3782 |
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Author |
Ayres, C.M.; Davey, L.M.; German, W.J. |
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Title |
Cerebral Hydatidosis. Clinical Case Report With A Review Of Pathogenesis |
Type |
Journal Article |
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Year |
1963 |
Publication |
Journal of Neurosurgery |
Abbreviated Journal |
J Neurosurg |
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Volume |
20 |
Issue |
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Pages |
371-377 |
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Keywords |
*Alaska; *Arctic Regions; *Brain Diseases; *Cattle; *Child; *Dogs; *Echinococcosis; *Ecology; *Epidemiology; *Heart Diseases; *Horses; *Infant; *Inuits; *Occipital Lobe; *Sheep; *Alaska; *Arctic Regions; *Brain Diseases; *Cattle; *Child; *Dogs; *Echinococcosis; *Ecology; *Epidemiology; *Eskimos; *Heart Diseases; *Horses; *Infant; *Occipital Lobe; *Review; *Sheep |
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English |
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ISSN |
0022-3085 |
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Notes |
PMID:14186052 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2748 |
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Author |
Bast, T.F.; Whitney, E.; Benach, J.L. |
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Title |
Considerations on the ecology of several arboviruses in eastern Long Island |
Type |
Journal Article |
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Year |
1973 |
Publication |
The American Journal of Tropical Medicine and Hygiene |
Abbreviated Journal |
Am J Trop Med Hyg |
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Volume |
22 |
Issue |
1 |
Pages |
109-115 |
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Keywords |
Animals; Antibodies, Viral/analysis; Arboviruses/*isolation & purification; Birds; Brain/microbiology; Ecology; Encephalitis Virus, St. Louis/immunology/isolation & purification; Encephalitis Virus, Western Equine/immunology/isolation & purification; Encephalitis Viruses/immunology/isolation & purification; Encephalitis Viruses, Tick-Borne/immunology/isolation & purification; Encephalomyelitis, Equine/epidemiology/veterinary; Hemagglutination Inhibition Tests; Horse Diseases/epidemiology; Horses; Humans; Insects; Liver/microbiology; Mites; Neutralization Tests; New York; Snakes; Ticks |
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English |
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Abbreviated Series Title |
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Edition |
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ISSN |
0002-9637 |
ISBN |
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Notes |
PMID:4684881 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2715 |
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Author |
Sanchez-Vizcaino, J.M. |
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Title |
Control and eradication of African horse sickness with vaccine |
Type |
Journal Article |
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Year |
2004 |
Publication |
Developments in Biologicals |
Abbreviated Journal |
Dev Biol (Basel) |
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Volume |
119 |
Issue |
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Pages |
255-258 |
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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 |
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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. |
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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 |
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Notes |
PMID:15742636 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2357 |
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Author |
Stout, I.J.; Clifford, C.M.; Keirans, J.E.; Portman, R.W. |
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Title |
Dermacentor variabilis (Say) (Acarina: Ixodidae) established in southeastern Washington and northern Idaho |
Type |
Journal Article |
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Year |
1971 |
Publication |
Journal of Medical Entomology |
Abbreviated Journal |
J Med Entomol |
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Volume |
8 |
Issue |
2 |
Pages |
143-147 |
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Keywords |
Animals; Arthropod Vectors; Disease Reservoirs/*epidemiology; Dogs; Ecology; Female; Horses; Humans; Idaho; Larva; Male; Seasons; Sheep; Tick Infestations/*epidemiology/veterinary; Ticks/*classification; Washington; Zoonoses |
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English |
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ISSN |
0022-2585 |
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Notes |
PMID:5157834 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2729 |
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Author |
Scherer, W.F.; Dickerman, R.W.; Ordonez, J.V. |
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Title |
Discovery and geographic distribution of Venezuelan encephalitis virus in Guatemala, Honduras, and British Honduras during 1965-68, and its possible movement to Central America and Mexico |
Type |
Journal Article |
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Year |
1970 |
Publication |
The American Journal of Tropical Medicine and Hygiene |
Abbreviated Journal |
Am J Trop Med Hyg |
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Volume |
19 |
Issue |
4 |
Pages |
703-711 |
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Keywords |
Animals; Antibodies/analysis; Belize; Central America; Complement Fixation Tests; Cricetinae; Culicidae; *Disease Reservoirs; Ecology; Encephalitis Viruses/isolation & purification; Encephalomyelitis, Equine/*epidemiology; Guatemala; Hemagglutination Inhibition Tests; Honduras; Horses; Humans; Mexico; Neutralization Tests; Rats; Sampling Studies; Swine; Tropical Climate |
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Place of Publication |
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English |
Summary Language |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0002-9637 |
ISBN |
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Notes |
PMID:4393224 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2735 |
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| Permanent link to this record |
