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Author |
Fulhorst, C.F.; Hardy, J.L.; Eldridge, B.F.; Chiles, R.E.; Reeves, W.C. |
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Title |
Ecology of Jamestown Canyon virus (Bunyaviridae: California serogroup) in coastal California |
Type |
Journal Article |
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Year |
1996 |
Publication |
The American Journal of Tropical Medicine and Hygiene |
Abbreviated Journal |
Am J Trop Med Hyg |
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Volume |
55 |
Issue |
2 |
Pages |
185-189 |
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Keywords |
Aedes/virology; Animals; Antibodies, Viral/blood; California/epidemiology; Cattle; Cattle Diseases/epidemiology; Deer; Dog Diseases/epidemiology; Dogs; Encephalitis Virus, California/immunology/*isolation & purification; Encephalitis, California/epidemiology/*veterinary; Female; Horse Diseases/epidemiology; Horses; Insect Vectors/virology; Lagomorpha; Male; Neutralization Tests/veterinary; Peromyscus; Rodent Diseases/epidemiology; Sigmodontinae |
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Abstract |
This paper reports the first isolation of Jamestown Canyon (JC) virus from coastal California and the results of tests for antibody to JC virus in mammals living in coastal California. The virus isolation was made from a pool of 50 Aedes dorsalis females collected as adults from Morro Bay, San Luis Obispo County, California. The virus isolate was identified by two-way plaque reduction-serum dilution neutralization tests done in Vero cell cultures. Sera from the mammals were tested for antibody to JC virus by a plaque-reduction serum dilution neutralization method. A high prevalence of JC virus-specific antibody was found in horses and cattle sampled from Morro Bay. This finding is additional evidence for the presence of a virus antigenically identical or closely related to JC virus in Morro Bay and indicates that the vectors of the virus in Morro Bay feed on large mammals. A high prevalence of virus-specific antibody was also found in horses sampled from Marin and San Diego counties. This finding suggests that viruses antigenically identical or closely related to JC virus are geographically widespread in coastal California. |
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School of Public Health, University of California, Berkeley, USA |
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English |
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ISSN |
0002-9637 |
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Notes |
PMID:8780458 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2656 |
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Author |
Kida, H. |
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Title |
[Ecology of influenza viruses in animals and the mechanism of emergence of new pandemic strains] |
Type |
Journal Article |
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Year |
1997 |
Publication |
Nippon Rinsho. Japanese Journal of Clinical Medicine |
Abbreviated Journal |
Nippon Rinsho |
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Volume |
55 |
Issue |
10 |
Pages |
2521-2526 |
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Keywords |
Animals; Bird Diseases/transmission; Birds; Horse Diseases/transmission; Horses; Humans; Influenza, Human/transmission/*veterinary; Swine; Swine Diseases/transmission; Zoonoses |
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Abstract |
Ecological studies on influenza viruses revealed that the hemagglutinin genes are introduced into new pandemic strains from viruses circulating in migratory ducks through domestic ducks and pigs in southern China. Experimental infection of pigs with 38 avian influenza virus strains with H1-H13 hemagglutinins showed that at least one strain of each HA subtype replicated in the upper respiratory tract of pigs. Co-infection of pigs with a swine virus and with an avian virus generated reassortant viruses. The results indicate that avian viruses of any subtype can contribute genes in the generation of reassortants. Virological surveillance revealed that influenza viruses in waterfowl reservoir are perpetuated year-by-year in the frozen lake water while ducks are absent. |
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Department of Disease Control, Hokkaido University Graduate School of Veterinary Medicine |
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Japanese |
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0047-1852 |
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Notes |
PMID:9360367 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2654 |
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Author |
Barwick, R.S.; Mohammed, H.O.; McDonough, P.L.; White, M.E. |
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Title |
Epidemiologic features of equine Leptospira interrogans of human significance |
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Journal Article |
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Year |
1998 |
Publication |
Preventive Veterinary Medicine |
Abbreviated Journal |
Prev Vet Med |
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Volume |
36 |
Issue |
2 |
Pages |
153-165 |
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Keywords |
Animals; Horse Diseases/epidemiology/*microbiology; Horses/microbiology; Humans; *Leptospira interrogans; New York/epidemiology; Weil Disease/epidemiology/microbiology/*veterinary; Zoonoses/epidemiology/*microbiology |
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Abstract |
Leptospirosis is a zoonotic bacterial disease caused by Leptospira interrogans. There is a serologic evidence that horses are exposed to L. interrogans and, as a shedder of these organisms, can be a threat to humans. We examined risk factors associated with the risk of testing seropositive to three L. interrogans serovars (L. icterohaemorrhagiae, L. grippotyphosa, and L. canicola) in the horses of New York State, in order to understand the epidemiology of the disease and suggest strategies to control and prevent equine leptospirosis. To carry out this study, blood samples were collected from a random sample of 2551 horses and tested for the presence of antibodies to the above serovars using the microscopic agglutination test. Samples with a titer $100 were considered positive. Clinical and demographic data were collected on each horse, the farms' management practices and ecology. Logistic regression analysis was used to develop a multivariate indexing system and to identify factors significantly associated with the risk of leptospirosis. Four indices were developed based on the possible sources of exposure: rodent exposure index; wildlife exposure index; soil and water index; and management index. The soil and water index was significantly associated with the risk of exposure to all three serovars. Management was positively associated with L. icterohaemorrhagiae and L. canicola. Density of horses turned out together was positively associated with the risk of exposure to L. grippotyphosa. We concluded that indirect exposure of horses to L. interrogans through contaminated soil and water appears to be significantly associated with the risk of exposure to all three serovars. Management appears to play an important role in the exposure to L. interrogans. Modification of management practices might reduce the horses' risk of exposure and hopefully minimize the human hazards. |
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Address |
Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA |
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English |
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ISSN |
0167-5877 |
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Notes |
PMID:9762736 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2653 |
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Author |
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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Address |
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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Corporate Author |
ArboNET Cooperative Surveillance Group |
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English |
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ISSN |
1080-6040 |
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Notes |
PMID:11585539 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2646 |
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Author |
Hall, R.A.; Broom, A.K.; Smith, D.W.; Mackenzie, J.S. |
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Title |
The ecology and epidemiology of Kunjin virus |
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Journal Article |
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Year |
2002 |
Publication |
Current Topics in Microbiology and Immunology |
Abbreviated Journal |
Curr Top Microbiol Immunol |
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Volume |
267 |
Issue |
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Pages |
253-269 |
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Keywords |
Animals; Culicidae/virology; Ecosystem; Horse Diseases/etiology; Horses; Humans; Insect Vectors; Population Surveillance; West Nile Fever/*epidemiology/*etiology/veterinary; West Nile virus/classification/genetics/immunology/*isolation & purification |
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Address |
Department of Microbiology and Parasitology, School of Molecular and Microbial Sciences, The University of Queensland, St. Lucia, Queensland 4072, Australia |
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English |
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ISSN |
0070-217X |
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Notes |
PMID:12082993 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2642 |
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Author |
Komar, N. |
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Title |
West Nile virus: epidemiology and ecology in North America |
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Journal Article |
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Year |
2003 |
Publication |
Advances in Virus Research |
Abbreviated Journal |
Adv Virus Res |
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Volume |
61 |
Issue |
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Pages |
185-234 |
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Keywords |
Animals; Bird Diseases/virology; Birds/virology; Culex/virology; Disease Reservoirs; Ecosystem; Epidemiology, Molecular; Horse Diseases/virology; Horses/virology; Humans; Insect Vectors; North America/epidemiology; Risk Factors; West Nile Fever/*epidemiology/transmission/veterinary; West Nile virus/genetics |
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Address |
Centers for Disease Control and Prevention, Division of Vector-Borne Infectious Diseases, Fort Collins, Colorado 80522, USA |
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English |
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ISSN |
0065-3527 |
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Notes |
PMID:14714433 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2638 |
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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 |
Summary Language |
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Abbreviated Series Title |
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Edition |
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ISSN |
0147-9571 |
ISBN |
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Conference |
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Notes |
PMID:15001316 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2637 |
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Author |
Gasser, R.B.; Hung, G.-C.; Chilton, N.B.; Beveridge, I. |
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Title |
Advances in developing molecular-diagnostic tools for strongyloid nematodes of equids: fundamental and applied implications |
Type |
Journal Article |
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Year |
2004 |
Publication |
Molecular and Cellular Probes |
Abbreviated Journal |
Mol Cell Probes |
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Volume |
18 |
Issue |
1 |
Pages |
3-16 |
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Keywords |
Animals; DNA, Helminth; DNA, Ribosomal/analysis; Equidae/*parasitology; Molecular Diagnostic Techniques/*methods; Parasitic Diseases, Animal/diagnosis; Strongylida/classification/genetics; Strongylida Infections/*diagnosis/epidemiology/etiology/veterinary |
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Abstract |
Infections of equids with parasitic nematodes of the order Strongylida (subfamilies Strongylinae and Cyathostominae) are of major veterinary importance. In last decades, the widespread use of drugs against these parasites has led to problems of resistance within the Cyathostominae, and to an increase in their prevalence and intensity of infection. Novel control strategies, based on improved knowledge of parasite biology and epidemiology, have thus become important. However, there are substantial limitations in the understanding of fundamental biological and systematic aspects of these parasites, which have been due largely to limitations in their specific identification and diagnosis using traditional, morphological approaches. Recently, there has been progress in the development of DNA-based approaches for the specific identification of strongyloids of equids for systematic studies and disease diagnosis. The present article briefly reviews information on the classification, biology, pathogenesis, epidemiology of equine strongyloids and the diagnosis of infections, highlights knowledge gaps in these areas, describes recent advances in the use of molecular techniques for the genetic characterisation, specific identification and differentiation of strongyloids of equids as a basis for fundamental investigations of the systematics, population biology and ecology. |
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Address |
Department of Veterinary Science, The University of Melbourne, 250 Princes Highway, Werribee, Victoria 3030, Australia. robinbg@unimelb.edu.au |
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English |
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ISSN |
0890-8508 |
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Notes |
PMID:15036364 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2636 |
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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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Address |
Dipartimento PR.I.M.E., Universita degli Studi di Foggia |
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Italian |
Summary Language |
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Original Title |
Ecologia di Thelazia spp. e dei vettori in Italia |
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Edition |
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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 |
Dargatz, D.A.; Traub-Dargatz, J.L. |
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Title |
Multidrug-resistant Salmonella and nosocomial infections |
Type |
Journal Article |
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Year |
2004 |
Publication |
The Veterinary Clinics of North America. Equine Practice |
Abbreviated Journal |
Vet Clin North Am Equine Pract |
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Volume |
20 |
Issue |
3 |
Pages |
587-600 |
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Keywords |
Animals; Anti-Bacterial Agents/*pharmacology; Cross Infection/prevention & control/*veterinary; Disease Outbreaks/prevention & control/veterinary; Drug Resistance, Bacterial; *Drug Resistance, Multiple, Bacterial; Horse Diseases/*drug therapy/transmission; Horses; Infection Control/methods; Microbial Sensitivity Tests/veterinary; Salmonella/*drug effects; Salmonella Infections, Animal/*drug therapy/transmission |
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Abstract |
Nosocomial infections are a serious threat to optimum patient care. In addition, nosocomial infections can have far-reaching consequences for the hospital personnel and the financial aspects of the hospital. Nosocomial infections with Salmonella spp have been described among hospitalized equine populations more frequently than any other agent. Salmonella spp associated with hospitalized equids often possess more antimicrobial resistance determinants than do Salmonella spp isolated from healthy horses in the general population. There is little evidence to suggest that resistant salmonellae are more virulent than nonresistant forms. MDR forms of Salmonella complicate the selection of appropriate antimicrobials when they are indicated, however. Furthermore, the use of some antimicrobials may apply selection pressure toward enhanced ability of MDR Salmonella to colonize equine patients. Further research should help to elucidate the risky uses of antimicrobials in the hospital setting and define the role of disinfectants and treatments such as NSAIDs in the ecology of MDR forms of nosocomial infections, including Salmonella. In the meantime, thoughtful selection of when and how to use antimicrobials in equine patients, together with deliberate selection of which antimicrobials to use based on monitoring data and other factors, such as safety and spectrum, is advised. |
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Address |
Animal and Plant Health Inspection Service, Veterinary Services, Centers for Epidemiology and Animal Health, United States Department of Agriculture, 2150 Centre Avenue, Building MS 2E7, Fort Collins, CO 80521, USA. david.a.dargatz@aphis.usda.gov |
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Language |
English |
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ISSN |
0749-0739 |
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Notes |
PMID:15519820 |
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no |
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Call Number |
Equine Behaviour @ team @ |
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2632 |
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