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Marfin, A.A.; Petersen, L.R.; Eidson, M.; Miller, J.; Hadler, J.; Farello, C.; Werner, B.; Campbell, G.L.; Layton, M.; Smith, P.; Bresnitz, E.; Cartter, M.; Scaletta, J.; Obiri, G.; Bunning, M.; Craven, R.C.; Roehrig, J.T.; Julian, K.G.; Hinten, S.R.; Gubler, D.J. |
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Title |
Widespread West Nile virus activity, eastern United States, 2000 |
Type |
Journal Article |
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Year |
2001 |
Publication |
Emerging Infectious Diseases |
Abbreviated Journal |
Emerg Infect Dis |
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Volume |
7 |
Issue |
4 |
Pages |
730-735 |
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Keywords |
Animals; Bird Diseases/epidemiology/virology; Culicidae/virology; *Disease Outbreaks; Ecology; Horse Diseases/epidemiology/virology; Horses; Humans; Population Surveillance; Songbirds/virology; United States/epidemiology; West Nile Fever/*epidemiology/veterinary/virology; *West Nile virus |
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Abstract |
In 1999, the U.S. West Nile (WN) virus epidemic was preceded by widespread reports of avian deaths. In 2000, ArboNET, a cooperative WN virus surveillance system, was implemented to monitor the sentinel epizootic that precedes human infection. This report summarizes 2000 surveillance data, documents widespread virus activity in 2000, and demonstrates the utility of monitoring virus activity in animals to identify human risk for infection. |
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Division of Vector-Borne Infections Diseases, Centers for Disease Control and Prevention, P.O. Box 2087, Fort Collins, CO 80522, USA. aam@cdc.gov |
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ArboNET Cooperative Surveillance Group |
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English |
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1080-6040 |
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PMID:11585539 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2646 |
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Author |
Waters, A.J.; Nicol, C.J.; French, N.P. |
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Title |
Factors influencing the development of stereotypic and redirected behaviours in young horses: findings of a four year prospective epidemiological study |
Type |
Journal Article |
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Year |
2002 |
Publication |
Equine veterinary journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
34 |
Issue |
6 |
Pages |
572-579 |
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Keywords |
Age Factors; Animal Husbandry/*methods; Animal Welfare; Animals; *Behavior, Animal; Female; Horse Diseases/epidemiology/prevention & control/*psychology; Horses; Housing, Animal; Longitudinal Studies; Male; Prevalence; Prospective Studies; Risk Factors; *Stereotyped Behavior; Weaning |
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Abstract |
Stereotypies are invariant and repetitive behaviour patterns that seemingly have no function, which tend to develop in captive animals faced with insoluble problems and may be indicative of reduced welfare. A 4 year prospective study of the factors influencing the development of stereotypic and redirected behaviours (abnormal behaviour) in a population of 225 young Thoroughbred and part-Thoroughbred horses was conducted between 1995 and 1999. Abnormal behaviour affected 34.7% of the population. Multivariable analysis showed that foals of low- or middle-ranking mares were less likely to develop abnormal behaviour than foals of dominant mares (rate ratio (RR) 0.23, P<0.01; RR 0.48, P<0.01, respectively). Weaning by confinement in a stable or barn was associated with an increased rate of development of abnormal behaviour, compared with paddock-weaning (RR 2.19, P<0.05), and housing in barns, rather than at grass after weaning, was associated with a further increase (RR 2.54, P<0.01). Specific stereotypic and redirected behaviours were then considered as separate outcomes. Crib-biting was initiated by 10.5% of horses at median age 20 weeks, weaving by 4.6% of horses at median age 60 weeks, box-walking by 2.3% of horses at median age 64 weeks and wood-chewing by 30.3% of horses at median age 30 weeks. Wood-chewing developed at a lower rate in horses born to subordinate or mid-ranking mares than in horses born to dominant mares (RR 0.29, P<0.01; RR 0.41, P<0.01, respectively), and at a higher rate in horses kept in barns or stables rather than at grass after weaning (RR 4.49, P<0.001; RR 1A6, P<0.001, respectively). Feeding concentrates after weaning was associated with a 4-fold increase in the rate of development of crib-biting (RR 4.12, P = 0.02). The results of this study support the idea that simple changes in feeding, housing and weaning practices could substantially lower the incidence of abnormal behaviour in young horses. |
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University of Bristol, Department of Clinical Veterinary Science, Langford, Bristol, UK |
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0425-1644 |
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Notes |
PMID:12357996 |
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Call Number |
refbase @ user @ |
Serial |
84 |
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Author |
Bachmann, I.; Audige, L.; Stauffacher, M. |
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Title |
Risk factors associated with behavioural disorders of crib-biting, weaving and box-walking in Swiss horses |
Type |
Journal Article |
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Year |
2003 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
35 |
Issue |
2 |
Pages |
158-163 |
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Keywords |
Animal Husbandry/*methods; Animals; *Behavior, Animal; Confounding Factors (Epidemiology); Data Collection; Female; Horse Diseases/epidemiology/*etiology/prevention & control; Horses; *Housing, Animal; Male; Mental Disorders/epidemiology/etiology/prevention & control/*veterinary; Prevalence; Regression Analysis; Risk Factors; *Stereotyped Behavior; Switzerland/epidemiology |
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Abstract |
REASONS FOR PERFORMING STUDY: Studies on the prevalence of behavioural disorders in horses and on associated risk factors have revealed inconsistent results. There are many studies on the neuropharmacological, surgical or mechanical therapy of stereotypies, but little is known about their causation. OBJECTIVES: To explore risk factors associated with the occurrence of behavioural disorders in horses. METHODS: A sample of horse owners, selected randomly and representative for Switzerland, was contacted in a postal survey. Answers were provided for 622 stables (response rate 35.2%). Individual data of 2,341 horses were examined with path analysis (multivariable linear and logistic regression), and adjustment made for possible confounding effects due to age and breed. RESULTS: Out of 60 possible risk factors, 11 were associated with the outcome at the univariable level (null-hypothesis path model) and 3 factors remained after the backward logistic regression procedure. Mature Warmbloods and Thoroughbreds, assessed by the owners to be reactive, fed 4 times a day and without daily pasture, had increased odds of displaying crib-biting, weaving and box-walking. Furthermore, indirect associations of 5 factors with the outcome were identified. CONCLUSIONS: The final logistic regression model of risk factors leads to the hypotheses that causal prevention of stereotypic behaviours should be based upon housing and management conditions which allow tactile contact with other horses (e.g. mutual grooming), daily free movement (paddock or pasture), as well as the provision of high amounts of roughage but of little or no concentrates. POTENTIAL CLINICAL RELEVANCE: It is one of the aims of population medicine to prevent the development of behavioural disorders. Further research is needed to test the concluding hypotheses in experimental studies or to verify them in the context of similar observational studies. |
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Institute of Animal Sciences, Swiss Federal Institute of Technology (ETH), LFW B55. 1, CH-8092 Zurich, Switzerland |
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0425-1644 |
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Notes |
PMID:12638792 |
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no |
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Call Number |
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Serial |
1907 |
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Author |
Nelson, D.M.; Gardner, I.A.; Chiles, R.F.; Balasuriya, U.B.; Eldridge, B.F.; Scott, T.W.; Reisen, W.K.; James Maclachlan, N. |
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Title |
Prevalence of antibodies against Saint Louis encephalitis and Jamestown Canyon viruses in California horses |
Type |
Journal Article |
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Year |
2004 |
Publication |
Comparative Immunology, Microbiology and Infectious Diseases |
Abbreviated Journal |
Comp Immunol Microbiol Infect Dis |
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Volume |
27 |
Issue |
3 |
Pages |
209-215 |
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Keywords |
Animals; Antibodies, Viral/*blood; California/epidemiology; Encephalitis Virus, California/*immunology/isolation & purification; Encephalitis Virus, St. Louis/*immunology/isolation & purification; Encephalitis, St. Louis/epidemiology/immunology/*veterinary/virology; Female; Horse Diseases/epidemiology/immunology/*virology; Horses; Logistic Models; Male; Neutralization Tests/veterinary; Polyomavirus Infections/epidemiology/immunology/*veterinary/virology; Questionnaires; Seroepidemiologic Studies; Tumor Virus Infections/epidemiology/immunology/*veterinary/virology |
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Abstract |
Jamestown Canyon (JC) and Saint Louis encephalitis (SLE) viruses are mosquito-transmitted viruses that have long been present in California. The objective of this study was to determine the seroprevalence of these two viruses in horses prior to the introduction of West Nile (WN) virus. Approximately 15% of serum samples collected in 1998 from 425 horses on 44 equine operations horses throughout California had serum antibodies to JC virus, whereas antibodies were not detected to SLE virus. The results indicate that horses in California were commonly infected prior to 1998 with mosquito-transmitted Bunyaviruses that are identical or closely related to JC virus, but not with SLE virus. The different seroprevalence of SLE and JC viruses in horses likely reflects the unique ecology of each virus, and it is predicted that WN virus will have a wider distribution in California than closely related SLE virus. |
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Address |
Animal and Plant Health Inspection Service, Veterinary Services, U.S. Department of Agriculture, California and Nevada Area Office, 9850 Micron Avenue, Suite E, Sacramento, CA 95827, USA |
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English |
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0147-9571 |
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Notes |
PMID:15001316 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2637 |
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Author |
Giangaspero, A.; Traversa, D.; Otranto, D. |
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Title |
[Ecology of Thelazia spp. in cattle and their vectors in Italy] |
Type |
Journal Article |
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Year |
2004 |
Publication |
Parassitologia |
Abbreviated Journal |
Parassitologia |
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Volume |
46 |
Issue |
1-2 |
Pages |
257-259 |
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Keywords |
Animals; Cattle/parasitology; Cattle Diseases/epidemiology/*parasitology/transmission; Disease Transmission, Horizontal; Dog Diseases/epidemiology/parasitology/transmission; Dogs/parasitology; Ecosystem; Eye Infections, Parasitic/epidemiology/transmission/*veterinary; Horse Diseases/epidemiology/parasitology/transmission; Horses/parasitology; Humans; Insect Vectors/*parasitology; Italy/epidemiology; Muscidae/*parasitology; Species Specificity; Spirurida Infections/epidemiology/transmission/*veterinary; Thelazioidea/classification/*isolation & purification |
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Abstract |
The genus Thelazia (Spirurida, Thelaziidae) includes a cosmopolitan group of eyeworm spirurids responsible for ocular infections in domestic and wild animals and transmitted by different species of muscids. Bovine thelaziosis is caused by Thelazia rhodesi Desmarest 1828, Thelazia gulosa Railliet & Henry 1910, and Thelazia skrjabini Erschow 1928, which occur in many countries; T. gulosa and T. skrjabini have been reported mainly in the New World, while T. rhodesi is particularly common in the Old World. In Italy, T. rhodesi was reported in southern regions a long time ago and, recently, T. gulosa and T. skrjabini have been identified in autochthonous cattle first in Apulia and then in Sardinia. Thirteen species of Musca are listed as intermediate hosts of eyeworms, but only Musca autumnalis and Musca larvipara have been demonstrated to act as vectors of Thelazia in the ex-URSS, North America, ex-Czechoslovakia and more recently in Sweden. In Italy, after the reports of T. gulosa and T. skrjabini in southern regions, the intermediate hosts of bovine eyeworms were initially only suspected as the predominant secretophagous Muscidae collected from the periocular region of cattle with thelaziosis were the face flies, M. autumnalis and M. larvipara, followed by Musca osiris, Musca tempestiva and Musca domestica. The well-known constraints in the identification of immature eyeworms to species by fly dissection and also the time-consuming techniques used constitute important obstacles to epidemiological field studies (i.e. vector identification and/or role, prevalence and pattern of infection in flies, etc.). Molecular studies have recently permitted to further investigations into this area. A PCR-RFLP analysis of the ribosomal ITS-1 sequence was developed to differentiate the 3 species of Thelazia (i.e. T. gulosa, T. rhodesi and T. skrjabini) found in Italy, then a molecular epidemiological survey has recently been carried out in field conditions throughout five seasons of fly activity and has identified the role of M. autumnalis, M. larvipara, M. osiris and M. domestica as vectors of T. gulosa and of M. autumnalis and M. larvipara of T. rhodesi. Moreover, M. osiris was described, for the first time, to act as a vector of T. gulosa and M. larvipara of T. gulosa and T. rhodesi. The mean prevalence in the fly population examined was found to be 2.86%. The molecular techniques have opened new perspectives for further research on the ecology and epidemiology not only of Thelazia in cattle but also of other autochthonous species of Thelazia which have been also recorded in Italy, such as Thelazia callipaeda, which is responsible for human and canid ocular infection and Thelazia lacrymalis, the horse eyeworm whose epidemiological molecular studies are in progress. |
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Dipartimento PR.I.M.E., Universita degli Studi di Foggia |
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Italian |
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Ecologia di Thelazia spp. e dei vettori in Italia |
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ISSN |
0048-2951 |
ISBN |
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Notes |
PMID:15305729 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2633 |
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Author |
Husted, L.; Andersen, M.S.; Borggaard, O.K.; Houe, H.; Olsen, S.N. |
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Title |
Risk factors for faecal sand excretion in Icelandic horses |
Type |
Journal Article |
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Year |
2005 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
37 |
Issue |
4 |
Pages |
351-355 |
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Keywords |
Animal Feed; Animal Husbandry/methods; Animals; Denmark; Feces/*chemistry; Female; Gastrointestinal Diseases/epidemiology/etiology/prevention & control/veterinary; Horse Diseases/epidemiology/etiology/prevention & control; Horses/*metabolism; Logistic Models; Male; Pilot Projects; *Poaceae/growth & development; Risk Factors; Silicon Dioxide/administration & dosage/adverse effects/*analysis; Soil/*analysis |
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Abstract |
REASONS FOR PERFORMING STUDY: Sandy soil is often mentioned as a risk factor in the development of sand-related gastrointestinal disease (SGID) in the horse. There are other variables, but few studies confirm any of these. OBJECTIVE: To investigate soil type, pasture quality, feeding practice in the paddock, age, sex and body condition score as risk factors for sand intake in the horse. METHODS: Faeces were collected from 211 Icelandic horses on 19 different studs in Denmark together with soil samples and other potential risk factors. Sand content in faeces determined by a sand sedimentation test was interpreted as evidence of sand intake. Soil types were identified by soil analysis and significance of the data was tested using logistic analysis. RESULTS: Of horses included in the study, 56.4% showed sand in the faeces and 5.7% had more than 5 mm sand as quantified by the rectal sleeve sedimentation test. Soil type had no significant effect when tested as main effect, but there was interaction between soil type and pasture quality. Significant interactions were also found between paddock feeding practice and pasture quality. CONCLUSION: To evaluate the risk of sand intake it is important to consider 3 variables: soil type, pasture quality and feeding practice. Pasture quality was identified as a risk factor of both short and long grass in combination with sandy soil, while clay soil had the lowest risk in these combinations. Feeding practice in the paddock revealed feeding directly on the ground to be a risk factor when there was short (1-5 cm) or no grass. Also, no feeding outdoors increased the risk on pastures with short grass, while this had no effect in paddocks with no grass. More than 50% of all horses investigated in this study had sand in the faeces. POTENTIAL RELEVANCE: The identification of risk factors is an important step towards prevention of SGID. Further research is necessary to determine why some horses exhibit more than 5 mm sand in the sedimentation test and whether this is correlated with geophagic behaviour. |
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Department of Large Animal Sciences, The Royal Veterinary and Agricultural University, Dyrlaegevej 88, DK-1870 Frederiksberg, Denmark |
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English |
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0425-1644 |
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Notes |
PMID:16028626 |
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no |
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Call Number |
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Serial |
1888 |
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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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English |
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0099-2240 |
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Notes |
PMID:16957241 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2622 |
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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 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2706 |
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Author |
Crans, W.J.; McNelly, J.; Schulze, T.L.; Main, A. |
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Title |
Isolation of eastern equine encephalitis virus from Aedes sollicitans during an epizootic in southern New Jersey |
Type |
Journal Article |
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Year |
1986 |
Publication |
Journal of the American Mosquito Control Association |
Abbreviated Journal |
J Am Mosq Control Assoc |
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Volume |
2 |
Issue |
1 |
Pages |
68-72 |
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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 |
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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. |
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Address |
Mosquito Research and Control, Cook College, Rutgers University, New Brunswick, NJ 08903 |
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Place of Publication |
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Language |
English |
Summary Language |
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Original Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
8756-971X |
ISBN |
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Notes |
PMID:2853203 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2684 |
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| Permanent link to this record |
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Author |
Hazem, A.S. |
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Title |
[Collective review: Salmonella paratyphi in animals and in the environment] |
Type |
Journal Article |
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Year |
1978 |
Publication |
DTW. Deutsche Tierarztliche Wochenschrift |
Abbreviated Journal |
Dtsch Tierarztl Wochenschr |
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Volume |
85 |
Issue |
7 |
Pages |
296-303 |
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Keywords |
Animals; Animals, Domestic; Animals, Wild; Bird Diseases/epidemiology; Brachyura; Cat Diseases/epidemiology; Cats; Cattle; Cattle Diseases/epidemiology; Dog Diseases/epidemiology; Dogs; Ecology; Environment; Fish Diseases/epidemiology; Germany, West; Horse Diseases/epidemiology; Horses; Mollusca; Poultry Diseases/epidemiology; Salmonella Infections, Animal/*epidemiology; *Salmonella paratyphi A; Sheep; Sheep Diseases/epidemiology; Snails; Swine; Swine Diseases/epidemiology |
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Abstract |
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Language |
German |
Summary Language |
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Original Title |
Sammelreferat: Salmonella paratyphi bei Tieren und in der Umwelt |
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Series Issue |
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Edition |
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ISSN |
0341-6593 |
ISBN |
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Notes |
PMID:352661 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2698 |
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| Permanent link to this record |
