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trajectory analysis of winds and eastern equine encephalitis in usa, 1980-5.backward trajectories of winds were determined to identify possible sources of eastern equine encephalitis virus associated with isolation of virus from mosquitoes or birds or outbreaks in horses between 1980 and 1985 in maryland, new jersey, new york and michigan, usa. the results of the trajectory analyses suggested that eastern equine encephalitis virus could have been carried by infected mosquitoes on surface winds at temperatures 13 degrees c or higher from north carolina north-eastwards al ...19901969804
isolation of cache valley virus and detection of antibody for selected arboviruses in michigan horses in 1980.blood samples collected in september and november 1980 from 87 horses in southwestern michigan were examined for virus isolation and for plaque-reduction neutralizing antibody against selected arboviruses. cache valley virus was isolated from the blood of a clinically normal horse in st joseph county in september. the age-specific antibody prevalence for cache valley virus indicated enzootic transmission in the study area. the high antibody prevalence and the lack of age-specific antibody preval ...19873631684
a 12-year retrospective study of equine abortion in michigan. 19979249170
simplified technique for isolation, excystation, and culture of sarcocystis species from opossums.sarcocystis neurona is a protozoan parasite that causes a neurological disease in horses called equine protozoal myeloencephalitis. the route of transmission is speculated to be by fecal-oral transfer of sporocysts shed from opossums. controversy exists regarding both the natural life cycle for this parasite as well as the species identity of opossum sarcocystis. to provide stage-specific material for species comparison, 27 opossums from southern michigan were screened for sarcocystis spp. sporo ...199910577742
west nile virus activity--united states, september 19-25, 2002, and michigan, january 1-september 24, 2002.this report summarizes west nile virus (wnv) surveillance data reported to cdc through arbonet and by states and other jurisdictions as of 7 a.m. mountain daylight time, september 25, 2002.200212363339
surveillance for acute insecticide-related illness associated with mosquito-control efforts--nine states, 1999-2002.ground and aerial applications of insecticides are used to control populations of adult mosquitoes, which spread such diseases as west nile virus--related illness, eastern equine encephalitis, and dengue fever. this report summarizes investigations of illnesses associated with exposures to insecticides used during 1999-2002 to control mosquito populations in nine states (arizona, california, florida, louisiana, michigan, new york, oregon, texas, and washington) (estimated 2000 population: 118 mi ...200312855943
west nile virus activity--united states, june 23-29, 2004.as of june 29, eight states had reported a total of 57 human cases of west nile virus (wnv) illness to cdc through arbonet in 2004. a total of 38 cases had been reported from arizona, 10 from california, three from new mexico, two from florida, and one each from michigan, nebraska, south dakota, and wyoming. thirty-six (64%) of the cases occurred in males; the median age of patients was 53 years (range: 9-84 years), and dates of illness onset ranged from april 23 to june 15. of the 57 cases, one ...200415229416
west nile virus activity--united states, september 15-21, 2004.during september 15-21, a total of 218 cases of human west nile virus (wnv) illness were reported from 21 states (arizona, california, florida, illinois, indiana, kansas, maryland, michigan, minnesota, mississippi, missouri, nebraska, nevada, new mexico, north dakota, oklahoma, south dakota, texas, utah, wisconsin, and wyoming).200415385920
west nile virus activity--united states, september 22-28, 2004.during september 22-28, a total of 180 cases of human west nile virus (wnv) illness were reported in the district of columbia (dc) and 24 states (alabama, arizona, california, georgia, illinois, iowa, kansas, kentucky, louisiana, maryland, michigan, minnesota, mississippi, missouri, montana, nebraska, nevada, new mexico, ohio, pennsylvania, texas, utah, wisconsin, and wyoming).200415457147
west nile virus activity--united states, october 6-12, 2004.during october 6-12, a total of 86 cases of human west nile virus (wnv) illness were reported from 18 states (arizona, florida, illinois, kansas, louisiana, michigan, minnesota, missouri, nevada, new jersey, new mexico, north dakota, ohio, oklahoma, pennsylvania, tennessee, texas, and utah).200415483530
west nile virus activity--united states, october 13-19, 2004.during october 13-19, a total of 200 cases of human west nile virus (wnv) illness were reported from 20 states (arizona, arkansas, california, colorado, illinois, indiana, iowa, kansas, maryland, michigan, mississippi, missouri, nevada, new mexico, north carolina, oklahoma, pennsylvania, south dakota, wisconsin, and wyoming).200415499683
west nile virus activity--united states, october 20-26, 2004.during october 20-26, a total of 80 cases of human west nile virus (wnv) illness were reported from 16 states (arizona, california, florida, iowa, kentucky, louisiana, michigan, mississippi, missouri, montana, nebraska, new york, ohio, south dakota, texas, and utah).200415514584
west nile virus activity--united states, october 27-november 2, 2004.during october 27-november 2, a total of 10 cases of human west nile virus (wnv) illness were reported from eight states (arizona, georgia, iowa, michigan, new mexico, ohio, oklahoma, and pennsylvania).200415525902
west nile virus activity--united states, november 9-16, 2004.during november 9-16, a total of 31 cases of human west nile virus (wnv) illness were reported from eight states (arizona, georgia, maryland, michigan, missouri, new york, pennsylvania, and texas).200415549023
wayne state university: medical education in the horse latitudes. 19725031026
an outbreak of eastern equine encephalitis virus in free-ranging white-tailed deer in michigan.eastern equine encephalitis (eee) virus has been recognized as affecting horses and humans in the eastern united states for 70 yr. evidence of exposure with eee virus has been reported in a variety of free-ranging wild birds and mammals but cases of clinical disease are much less commonly reported. in michigan, reports of outbreaks of eee virus in equine species extend back more than a half century. we report diagnosis of eee virus infection of multiple free-ranging white-tailed deer (odocoileus ...200717984258
identification of human enteric pathogens in gull feces at southwestern lake michigan bathing beaches.ring-billed (larus delawarensis ord, 1815) and herring (larus argentatus pontoppidan, 1763) gulls are predominant species of shorebirds in coastal areas. gulls contribute to the fecal indicator burden in beach sands, which, once transported to bathing waters, may result in water quality failures. the importance of these contamination sources must not be overlooked when considering the impact of poor bathing water quality on human health. this study examined the occurrence of human enteric pathog ...200819096455
an outbreak of salmonellosis among horses at a veterinary teaching hospital.between may 1996 and february 1997, 27 horses and a veterinary student at a veterinary teaching hospital developed apparent nosocomial salmonella typhimurium infection. the source of the multiple-drug resistant salmonella typhimurium was a neonatal foal admitted for treatment of septicemia. a high infection rate (approx 13% of hospitalized horses) coupled with a high case fatality rate (44%) for the initial 18 horses affected led to a decision to close the hospital for extensive cleaning and dis ...200111318368
the seroprevalence of antibodies to sarcocystis neurona in michigan equids.a cross-sectional study of serum antibodies to sarcocystis neurona (the etiologic agent of equine protozoal myeloencephalitis, epm) was performed on michigan equids. our objectives were to determine the seroprevalence of antibodies to s. neurona in michigan equids and to identify specific risk factors for seropositivity. a random, weighted sample of michigan horse farms (stratified by the state's opossum (didelphis virginiana) population and the number of equids on each operation) was selected. ...200111154784
risk factors for colic in the michigan (usa) equine population.a population-based prospective epidemiological study was conducted to assess risk factors for equine colic. a stratified sample of 3925 equids in 138 randomly selected equine farms in the state of michigan was monitored in two 12-month rounds of data collection. incidence densities were used to describe the rate of development of colic in the study population. mortality rates, case fatality rates and survival rates were used to describe the severity of colic on the study population. multivariabl ...19979234409
economics of health management in the michigan, usa equine industry.a study was developed to describe direct expenses, labor use, and performance days lost associated with health management in the michigan equine industry. a prospective design with stratified, random sampling, was employed involving 77 operations from february 1992 through january 1993, and 61 different operations from may 1993 through april 1994. data on the cost of health management were collected during monthly visits, and included monetary expenditures, death losses, days lost, and labor use ...19979234407
patterns of health maintenance on michigan equine operations.data from two 12 month prospective monitoring programs that followed management, economics and animal health from randomly-sampled equine operations in michigan were used to determine patterns of health maintenance. health maintenance measures were grouped, and average uses per year were computed for the most-common measures reported: respiratory, potomac horse fever, neurological and multiple-system vaccinations, deworming, and general farrier work. factors examined for potential association wi ...19979234405
evaluation of outbreaks of disease attributable to eastern equine encephalitis virus in horses.to evaluate outbreaks of disease attributable to eastern equine encephalitis virus (eeev) in horses in michigan, and the associated environmental patterns and weather conditions, so that factors could be identified that may have predisposed horses in specific areas of the state to infections with eeev.19968707672
investigations of the vertebrate hosts of eastern equine encephalitis during an epizootic in michigan, 1980.a study was undertaken to investigate an increase in reported cases of clinical encephalitis due to eastern equine encephalitis (eee) virus in horses and to determine the natural vertebrate hosts of that virus. horses, birds, and small mammals were sampled at sites in a contiguous area in st. joseph and kalamazoo counties, michigan, from 25 august to 5 september 1980. serum samples from four horses acutely ill with encephalitis and 16 of 39 pasture mates of ill horses had neutralizing (n) antibo ...19853010751
a herd-level analysis of risk factors for antibodies to sarcocystis neurona in michigan equids.equine protozoal myeloencephalitis (epm) is a neurological disease of horses and ponies caused by infection of the central nervous system with the protozoan parasite sarcocystis neurona. a herd-level analysis of a cross-sectional study of serum antibodies to s. neurona in michigan equids was conducted, using data collected in 1997 for study that included 1121 equids from 98 michigan horse farms. our objective was to identify specific herd-level risk factors associated with seropositivity. we tes ...200312547171
use of repetitive sequence-based polymerase chain reaction for molecular epidemiologic analysis of streptococcus equi subspecies equi.to determine whether repetitive sequence-based polymerase chain reaction (rep-pcr) could be used to differentiate streptococcus equi isolates, to examine s equi isolates from throughout the world, and to determine whether a horse had > 1 subtype of s equi during an outbreak of disease.200010850848
survival analysis of risk factors associated with the occurrence of lameness in a michigan horse population.to evaluate the associations of operation and individual animal-level risk factors with occurrence of lameness in the michigan horse population.19989442238
studies of equine influenza in michigan, 1963. ii. epizootiology. 19665948842
studies of equine influenza in michigan, 1963. i. etiology. 19665948841
airway inflammation in michigan pleasure horses: prevalence and risk factors.although subclinical airway inflammation is thought to be common in horses, there is little information on its prevalence and none on risk factors.200616866194
diagnosis of eastern equine encephalitis by immunohistochemistry in two flocks of michigan ring-neck pheasants.the diagnosis of eastern equine encephalitis (eee) virus infection in avian species is relatively difficult when compared with other species. there are no characteristic histologic lesions in the avian brain that would serve to distinguish eee from infections with, for example, newcastle disease or highly pathogenic avian influenza virus. traditionally, virus isolation (vi) and/or hemagglutination inhibition (hi) has been used for a definitive diagnosis of eee in birds. recently, we developed an ...200011195627
eastern equine encephalitis in michigan. 19827073564
renal tubular acidosis in horses (1980-1999).renal tubular acidosis (rta) is characterized by altered renal tubular function resulting in hyperchloremic metabolic acidosis. the purpose of the study was to describe rta in 16 horses. no breed or sex predilection was found. the mean age at onset of the disease was 7 years of age. the type of diet had no apparent effect on development of rta. the most common clinical signs were depression, poor performance, weight loss, and anorexia. initial blood work revealed a marked hyperchloremic metaboli ...200111300597
evaluating the economic and noneconomic impacts of the veterinary medical profession in michigan.this study reaffirms the diversity and breadth of the veterinary profession. as it turns out, some of the furthest-reaching impacts of the veterinary medical profession were largely non-quantifiable. the veterinary medical profession had a substantial direct economic impact in michigan during 1995. the total economic contribution of the veterinary medical profession to michigan during 1995 that was attributable to expenditures on salaries, supplies, services, and their multiplier effect was appr ...200010638314
suspected hepatotoxicity in neonatal foals: preliminary report of an emerging syndrome.an apparently new and emerging fatal hepatic disease affecting foals is described. characteristics included evidence of hepatic failure, marked biliary hyperplasia, hepatocellular necrosis and occasionally fibrosis. generally, the features of the disease appear to differ markedly from other hepatic diseases of neonatal foals.19846702079
the prevalence of laryngeal disease in a large population of competition draft horses.(1) to determine the effect of age, height, weight, breed, sex, and specific use on the prevalence of idiopathic left laryngeal hemiplegia (ilh) in a population of draft performance horses; (2) to determine the association between tracheal mucus and laryngeal dysfunction, and the prevalence of exercise-induced pulmonary hemorrhage (eiph) in a population of draft performance horses.200616911159
a survey of ocular abnormalities in miniature horses.to determine the incidence of ocular abnormalities in miniature horses.201121733064
high prevalence of eee in michigan. 201021090150
practice-based education at michigan state university.practice-based large animal education at michigan state university (msu) was initiated in 1995. urbanization of the area surrounding msu and the declining number of livestock and farms to provide clinical experience under field conditions were the major reasons for adopting this educational model. veterinary students, as a requirement for graduation from the professional program, must successfully complete a three-week clerkship in a private practice that has either a food animal or an equine em ...200516421844
phylogenetic relationships of sarcocystis neurona of horses and opossums to other cyst-forming coccidia deduced from ssu rrna gene sequences.phylogenetic analyses based on sequences of the nuclear-encoded small subunit rrna (ssurrna) gene were performed to examine the origin, phylogeny, and biogeographic relationships of sarcocystis neurona isolates from opossums and horses from the state of michigan, usa, in relation to other cyst-forming coccidia. a total of 31 taxa representing all recognized subfamilies and genera of sarcocystidae were included in the analyses with clonal isolates of two opossum and two horse s. neurona. phylogen ...200516133298
the michigan equine monitoring system. i. design, implementation and population estimates.the michigan equine monitoring system (mems) was designed and implemented in the state of michigan, starting in 1991. the program was designed systematically to track the state's equine population, its health, and its economic implications to the equine industry. the mems was designed as a two-phase program. phase i (the population and economic survey; the subject of this paper) was designed to provide new and statistically valid information describing the size, composition, location and economi ...19979234435
factors influencing recovery from and duration of lameness in michigan (usa) horses.the objective of this study was to identify factors that may affect recovery from and duration of a case of lameness in a stratified random sample of michigan horses. this was done using data from phase-ii of the michigan equine monitoring system (mems phase-ii), the equine health-monitoring study [kaneene et al., prev. vet. med. 29 (1997b) 277-292; ross and kaneene, prev. vet. med. 28 (1996a) 209-224; ross and kaneene, prev. vet. med. 29 (1996b) 59-75; ross et al., am. j. vet. res. 59 (1997) 23 ...199910384949
the michigan equine monitoring system. ii. frequencies and impact of selected health problems.a prospective study was designed to document the frequencies of equine health problems in the state of michigan, usa. a total of 2469 horses from a random sample of 138 equine operations were monitored in the study in two 12-month periods: 1992-1993 and 1993-1994. all the major breeds of horses in the state were proportionately represented in the sample. using weighted annual incidence densities as measures of disease frequencies, the 10 most frequently observed groups of health problems were (f ...19979234436
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