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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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0099-2240 |
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PMID:16957241 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2622 |
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Author |
Wilhelm, W.E.; Anderson, J.H. |
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Title |
Vahlkampfia lobospinosa (Craig. 1912) Craig. 1913: rediscovery of a coprozoic ameba |
Type |
Journal Article |
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Year |
1971 |
Publication |
The Journal of Parasitology |
Abbreviated Journal |
J Parasitol |
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Volume |
57 |
Issue |
6 |
Pages |
1378-1379 |
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Keywords |
Animals; Cattle; Ecology; Feces/microbiology; Horse Diseases/epidemiology; Horses; Protozoan Infections/epidemiology; *Protozoan Infections, Animal; Sarcodina/*classification/growth & development; Swine; Swine Diseases/epidemiology; Tennessee |
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0022-3395 |
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Notes |
PMID:5157177 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2724 |
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Author |
Clark, T.B.; Peterson, B.V.; Whitcomb, R.F.; Henegar, R.B.; Hackett, K.J.; Tully, J.G. |
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Title |
Spiroplasmas in the Tabanidae |
Type |
Journal Article |
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Year |
1984 |
Publication |
Israel Journal of Medical Sciences |
Abbreviated Journal |
Isr J Med Sci |
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Volume |
20 |
Issue |
10 |
Pages |
1002-1005 |
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Keywords |
Animals; Diptera/*microbiology/ultrastructure; Ecology; Female; Hemolymph/microbiology; Male; Maryland; North Carolina; Plants/microbiology; Spiroplasma/classification/*isolation & purification/physiology |
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Abstract |
Spiroplasmas were observed in seven species of the family Tabanidae (horse flies and deer flies). This is the fifth family of the order Diptera now known to harbor spiroplasmas. Noncultivable spiroplasmas were seen in the hemolymph of three species of the genus Tabanus, and cultivable forms were isolated from the guts of six species in three genera. Isolates from T. calens and T. sulcifrons were serologically similar and closely related to a spiroplasma in the lampyrid beetle, Ellychnia corrusca. These three isolates represent a new serogroup. Isolates from Hybomitra lasiophthalma were related to Group IV strains, while those from T. nigrovittatus and Chrysops sp. both represented new serogroups. At least some tabanids probably acquire spiroplasmas from contaminated flower surfaces. The possibility of vertebrate reservoirs for some tabanid spiroplasmas remains an open question. |
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0021-2180 |
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Notes |
PMID:6511308 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2687 |
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Author |
Sabattini, M.S.; Monath, T.P.; Mitchell, C.J.; Daffner, J.F.; Bowen, G.S.; Pauli, R.; Contigiani, M.S. |
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Title |
Arbovirus investigations in Argentina, 1977-1980. I. Historical aspects and description of study sites |
Type |
Journal Article |
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Year |
1985 |
Publication |
The American Journal of Tropical Medicine and Hygiene |
Abbreviated Journal |
Am J Trop Med Hyg |
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Volume |
34 |
Issue |
5 |
Pages |
937-944 |
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Keywords |
Animals; Arbovirus Infections/*epidemiology/microbiology; Arboviruses; Argentina; Birds; Cattle; Child; Climate; Ecology; Encephalitis Virus, St. Louis; Encephalitis Virus, Venezuelan Equine; Encephalitis Virus, Western Equine; Encephalitis, St. Louis/epidemiology/microbiology; Encephalomyelitis, Equine/epidemiology/microbiology/veterinary; Encephalomyelitis, Venezuelan Equine/epidemiology/microbiology/veterinary; Geography; Horse Diseases/epidemiology/microbiology; Horses/microbiology; Humans |
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Abstract |
This is the introductory paper to a series on the ecology of arboviruses in Argentina. Epizootics of equine encephalitis have occurred since at least 1908, principally in the Pampa and Espinal biogeographic zones, with significant economic losses; human cases of encephalitis have been rare or absent. Both western equine and eastern equine encephalitis viruses have been isolated from horses during these epizootics, but the mosquitoes responsible for transmission have not been identified. A number of isolations of Venezuelan equine encephalitis (VEE) virus were reported between 1936 and 1958 in Argentina, but the validity of these findings has been seriously questioned. Nevertheless, serological evidence exists for human infections with a member of the VEE virus complex. Serological surveys conducted in the 1960s indicate a high prevalence of infection of humans and domestic animals with St. Louis encephalitis (SLE), and 2 SLE virus strains have been isolated from rodents. Human disease, however, has rarely been associated with SLE infection. Only 7 isolations of other arboviruses have been described (3 of Maguari, 1 of Aura, 2 of Una, and 1 of an untyped Bunyamwera group virus). In 1977, we began longitudinal field studies in Santa Fe Province, the epicenter of previous equine epizootics, and in 1980 we extended these studies to Chaco and Corrientes provinces. The study sites are described in this paper. |
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English |
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Series Volume |
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ISSN |
0002-9637 |
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Notes |
PMID:4037184 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2685 |
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Author |
Milinovich, G.J.; Trott, D.J.; Burrell, P.C.; van Eps, A.W.; Thoefner, M.B.; Blackall, L.L.; Al Jassim, R.A.M.; Morton, J.M.; Pollitt, C.C. |
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Title |
Changes in equine hindgut bacterial populations during oligofructose-induced laminitis |
Type |
Journal Article |
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Year |
2006 |
Publication |
Environmental Microbiology |
Abbreviated Journal |
Environ Microbiol |
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Volume |
8 |
Issue |
5 |
Pages |
885-898 |
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Keywords |
Animal Feed; Animals; Bacteria/classification/*isolation & purification; DNA, Bacterial/analysis; Disease Models, Animal; Feces/microbiology; Foot Diseases/etiology/microbiology/*veterinary; Horse Diseases/*etiology/metabolism/microbiology; Horses; In Situ Hybridization, Fluorescence; Intestines/*microbiology; Oligosaccharides/*administration & dosage/*metabolism; Phylogeny; Polymerase Chain Reaction; RNA, Bacterial/analysis; RNA, Ribosomal, 16S/analysis |
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Abstract |
In the horse, carbohydrate overload is thought to play an integral role in the onset of laminitis by drastically altering the profile of bacterial populations in the hindgut. The objectives of this study were to develop and validate microbial ecology methods to monitor changes in bacterial populations throughout the course of experimentally induced laminitis and to identify the predominant oligofructose-utilizing organisms. Laminitis was induced in five horses by administration of oligofructose. Faecal specimens were collected at 8 h intervals from 72 h before to 72 h after the administration of oligofructose. Hindgut microbiota able to utilize oligofructose were enumerated throughout the course of the experiment using habitat-simulating medium. Isolates were collected and representatives identified by 16S rRNA gene sequencing. The majority of these isolates collected belonged to the genus Streptococcus, 91% of which were identified as being most closely related to Streptococcus infantarius ssp. coli. Furthermore, S. infantarius ssp. coli was the predominant oligofructose-utilizing organism isolated before the onset of lameness. Fluorescence in situ hybridization probes developed to specifically target the isolated Streptococcus spp. demonstrated marked population increases between 8 and 16 h post oligofructose administration. This was followed by a rapid population decline which corresponded with a sharp decline in faecal pH and subsequently lameness at 24-32 h post oligofructose administration. This research suggests that streptococci within the Streptococcus bovis/equinus complex may be involved in the series of events which precede the onset of laminitis in the horse. |
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Address |
Australian Equine Laminitis Research Unit, School of Veterinary Science, The University of Queensland, Queensland, Australia. g.milinovich@uq.edu.au |
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English |
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ISSN |
1462-2912 |
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Notes |
PMID:16623745 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2625 |
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Author |
Alexander, D.J. |
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Title |
Ecological aspects of influenza A viruses in animals and their relationship to human influenza: a review |
Type |
Journal Article |
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Year |
1982 |
Publication |
Journal of the Royal Society of Medicine |
Abbreviated Journal |
J R Soc Med |
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Volume |
75 |
Issue |
10 |
Pages |
799-811 |
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Keywords |
Animals; *Animals, Domestic; Bird Diseases/transmission; Birds; Disease Outbreaks; Ecology; Horse Diseases/transmission; Horses; Humans; Influenza A virus/genetics/isolation & purification; Influenza, Human/microbiology/*transmission/veterinary; Swine; Swine Diseases/transmission; Zoonoses/transmission |
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English |
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Abbreviated Series Title |
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ISSN |
0141-0768 |
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Notes |
PMID:6752410 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2689 |
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Author |
Eisgruber, H.; Stolle, F.A. |
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Title |
[Clostridia in carcasses and fresh meat--a literature review] |
Type |
Journal Article |
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Year |
1992 |
Publication |
Zentralblatt fur Veterinarmedizin. Reihe B. Journal of Veterinary Medicine. Series B |
Abbreviated Journal |
Zentralbl Veterinarmed B |
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Volume |
39 |
Issue |
10 |
Pages |
746-754 |
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Keywords |
Abattoirs; Animals; Cattle; Clostridium/*growth & development; *Food Microbiology; Horses; Meat/*microbiology; Muscles/*microbiology; Sheep; Swine |
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Abstract |
Clostridia are of large clinical importance as well as in the field of food hygiene, where they are responsible for spoilage but they also have a certain significance as food poisoning organisms. Information on the ecology of Clostridia in samples of deep muscle tissue of slaughtered animals is insufficient. This article is intended to increase the knowledge on the occurrence of different Clostridia species in slaughtered animals. The main emphasis is put on the significance of clostridia in meat hygiene. The theoretical basis of the so called original content of microorganisms (intrinsic bacteria), the factors and pathways of Clostridia spreading in muscles and organs are demonstrated. |
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Institut fur Hygiene und Technologie, Ludwig-Maximilians-Universitat Munchen |
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German |
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Original Title |
Clostridien in Schlachttierkorpern und frischem Fleisch--Eine Literaturubersicht |
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0514-7166 |
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Notes |
PMID:1492516 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2668 |
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Author |
Alexander, F.; Davies, M.E.; Muir, A.R. |
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Title |
Bacteriophage-like particles in the large intestine of the horse |
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Journal Article |
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Year |
1970 |
Publication |
Research in veterinary science |
Abbreviated Journal |
Res Vet Sci |
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Volume |
11 |
Issue |
6 |
Pages |
592-593 |
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Keywords |
Animals; Bacteriophages/*isolation & purification; Cecum/microbiology; Colon/microbiology |
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English |
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0034-5288 |
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Notes |
PMID:5498578 |
Approved |
no |
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Call Number |
refbase @ user @ |
Serial |
114 |
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Author |
Scherer, W.F.; Madalengoitia, J.; Flores, W.; Acosta, M. |
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Title |
Ecologic studies of Venezuelan encephalitis virus in Peru during 1970-1971 |
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 |
4 |
Pages |
347-355 |
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Keywords |
Animals; Antibodies, Viral; Cricetinae/immunology; Culicidae/microbiology; *Disease Vectors; Ecology; *Encephalitis Virus, Venezuelan Equine/immunology/isolation & purification; Encephalomyelitis, Equine/immunology/microbiology/transmission; Female; Hemagglutination Inhibition Tests; Horses/immunology; Humans; Neutralization Tests; Peru |
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Abstract |
Venezuelan encephalitis (VE) virus has intermittently produced epidemics and equine epizootics on the dry Pacific coastal plain of Peru since at least the 1930's. However, evidence that the virus exists in the Amazon region of Peru to the east of the Andes mountains was not obtained until antibodies were found in human sera collected in 1965, and 10 strains of the virus were isolated in a forest near the city of Iquitos, Peru during February and March 1971. Eight strains came from mosquitoes and two from dead sentinel hamsters. Three hamsters exposed in forests near Iquitos developed VE virus antibodies suggesting that hamster-benign strains also exist there. Antibody tests of equine sera revealed no evidence that VE virus was actively cycling during the late 1950's or 1960's in southern coastal Peru, where equine epizootics had occurred in the 1930's and 1940's. In northern coastal Peru bordering Ecuador, antibodies were present in equine sera, presumably residual from the 1969 outbreak caused by subtype I virus, since neutralizing antibody titers were higher to subtype I virus than to subtypes III or IV. No VE virus was detected in this northern region during the dry season of 1970 by use of sentinel hamsters. The possibility is considered that VE epidemics and equine epizootics on the Pacific coast of Peru are caused by movements of virus in infected vertebrates traversing Andean passes or in infected vertebrates or mosquitoes carried in airplanes from the Amazon region. |
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English |
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ISSN |
0002-9262 |
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Notes |
PMID:235838 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2705 |
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Author |
Nowlan, S.S.; Deibel, R.H. |
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Title |
Group Q streptococci. I. Ecology, serology, physiology, and relationship to established enterococci |
Type |
Journal Article |
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Year |
1967 |
Publication |
Journal of Bacteriology |
Abbreviated Journal |
J Bacteriol |
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Volume |
94 |
Issue |
2 |
Pages |
291-296 |
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Keywords |
Animals; Antigens/analysis; Cattle; Dogs; Enterococcus faecalis/metabolism; Feces/microbiology; Horses; Humans; Poultry; Precipitin Tests; Rabbits; Sheep; *Streptococcus/immunology/isolation & purification/metabolism; Swine |
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Abstract |
The group Q streptococci possess unique serological and physiological characteristics which differentiate them from established enterococci. The group Q antigen was not demonstrable in all strains; however, all possessed the group D antigen. All group Q strains were physiologically similar regardless of whether or not they possessed the group Q antigen. These strains differed from the established enterococcal species, as they neither hydrolyzed arginine nor initiated growth in 1.0% methylene blue-milk. They also differed radically in the fermentation of various carbohydrates, especially the polyhydric sugar alcohols. The results indicate that the group Q streptococci constitute a unique taxonomic entity; the species designation Streptococcus avium sp. n. is suggested, owing to their characteristic occurrence in chicken fecal specimens. |
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English |
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0021-9193 |
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Notes |
PMID:4962699 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2746 |
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