Topic:Disease Prevalence
Disease prevalence in horses refers to the frequency and distribution of various diseases within equine populations. Understanding disease prevalence is essential for identifying health trends, assessing risk factors, and implementing effective disease management and prevention strategies. Common diseases affecting horses include equine influenza, equine herpesvirus, strangles, and equine infectious anemia. The study of disease prevalence involves collecting and analyzing data from veterinary reports, field studies, and laboratory diagnostics. This page compiles peer-reviewed research studies and scholarly articles that investigate the patterns, causes, and implications of disease prevalence in horses, providing insights into equine health management and epidemiology.
Ross River virus activity along the south coast of New South Wales. The sera of 468 blood donors and 63 domestic animals, collected from the south coast of New South Wales, were tested for the presence of antibodies to Ross River virus. Antibodies were detected in 7% of human sera, 25% of cow sera and 65% of horse sera. Using the blood donors as 'human sentinels', seroconversions were demonstrated in two donors from the Nowra-Kiama region and from a patient in the same area; none of the three had been outside of the study area during the period of seroconversion or at the time of infection. Of the 15 seropositive horses, 6 (40%) had lived continuously since bi...
The prevalence of Gasterophilus intestinalis in horses in northern England and Wales. The stomachs of 448 horses from northern England and Wales were examined for Gasterophilus larvae, and 237 (52.7%) were found to be infected with G. intestinalis. Larvae were present in stomachs examined during each month of the year except August. Second instar larvae occurred from September through February and third instars were present from November through July. Adult fly activity began in August as indicated by the presence of eggs on horses. The life-cycle of G. intestinalis in northern England and Wales is outlined from the data presented. The mean instar burdens were 15.7 second and 3...
Serologic evidence of Jamestown Canyon and Keystone virus infection in vertebrates of the DelMarVa Peninsula. Serological data accumulated during the past decade indicated that a variety of feral and domestic animals of the Delaware-Maryland-Virginia (DelMarVa) Peninsula were infected with Jamestown Canyon (JC) and/or Keystone (KEY) viruses (Bunyaviridae, California serogroup). Neutralizing (N) antibody to JC virus was most prevalent in white-tailed deer, sika deer, cottontail rabbits and horses. KEY virus N antibody was detected most frequently in gray squirrels and domestic goats. N antibody indicative of past infection by one or both viruses also was found in raccoons, horses and humans. JC and/or ...
Variation in arbovirus infection rates in species of birds sampled in a serological survey during an encephalitis epidemic in the Murray Valley of South-eastern Australia, February 1974. There was extensive and exuberant breeding of waterbirds before and during an epidemic of arboviral encephalitis in the Murray Valley of south eastern Australia in 1974. As estimated by haemagglutination inhibition tests on 432 bird sera collected between 4th and 13th February, 1974, infection with Murray Valley encephalitis virus, Kunjin virus and possibly other flaviviruses was concentrated in species of the Order Ciconiiformes (55% positive) and Pelecaniformes (41%), compared with only 5% in Anseriformes. Although Sindbis virus infections were also highest in these 2 Orders (56% and 46%, re...
Cyathostominae and other strongyles of horses in the Federal Republic of Germany. The faeces of 34 horses of the "Bavarian main and state studfarm Schwaiganger" (Group I) and 10 ponies (Group II) from various regions of the Federal Republic of Germany, were examined and 4 834 small strongyles were identified. Three species Cyathostomum catinatum, Cylicostephanus longibursatus and Cylicocylus nassatus, were found to be widely distributed. Although various modern anthelmintics with different effective components were used over the past 20 years, no remarkable change has been brought about in the composition of the parasitic species of the horses in the Federal Republic of Ger...
Prevalence of leptospiral titres in normal horses. Serum samples were collected from 479 clinically normal horses from 11 different locations in Queensland. Using a microscopic agglutination test, 157 serums (33%) reacted to one or more serovars of Leptospira interrogans at a minimum serum dilution of 1/30. The prevalences of reactors among all horses to the serovars tested were pomona 30.5% icterohaemorrhagiae 23.9%, tarassovi 18.8%, hardjo 12.2%, canicola 8.6%, grippotyphosa 3.6%, and australis 2%. There was a significantly higher prevalence of reactors in tropical areas than in sub-tropical areas, but no difference in prevalence between coa...
Isolation of acholeplasmas from horse feces. Acholeplasmas were detected in five of 96 feces samples from clinically normal horses. Three of the five strains isolated were identified as A. equifetale, one as A. hippikon, and one was serologically identical with the Acholeplasma strain 881.
Observations on the epidemiology of equine hydatidosis in Britain. Of 1388 horses and ponies examined at two abattoirs in the north of England from November 1979 to September 1981, 123 (8.7 per cent) showed evidence of hydatid infection. Prevalence of infection was closely related to age, rising from nil in animals up to two years old to over 20 per cent of those over eight years. Full-mouthed horses and ponies had similar prevalence rates (14.9 and 14.5 per cent, respectively), but horses had nearly twice as many viable infections as ponies. The prevalence of infection varied with the region of origin of full-mouthed horses and ponies, with 18 per cent of th...
Isolation of two serotypes of equine adenovirus from horses in New Zealand. Two serologically unrelated adenoviruses were isolated from ill-thrifty young horses on a thoroughbred stud. The viruses differed in their cytopathic effects in cell culture and in their haemagglutination properties. A serological survey of horses in the northern half of the North Island showed the prevalence of precipitating antibodies against equine adenoviruses to be 39%.
Survey of equine hydatidosis in Great Britain. A survey of 1141 horses and ponies, for the presence of hydatid infection, was carried out at an export meat plant near Bristol. Lesions were attributed carefully by morphological, histological and immunological examinations and assessed by flame cell activity. All available detail concerning the animals was recorded. The surveys in the literature were assessed for the criteria on which their figures were based and were compared with the findings of this present survey. Attention was drawn to the apparent discord between the results of some surveys and others.
Prevalence of antibodies to Legionella pneumophila in animal populations. We examined more than 2,800 human and animal sera for antibodies to four serogroups of Legionella pneumophila by using the microagglutination test. Antibody titers of greater than or equal to 1:64 were considered positive. The occurrence of positive equine sera (31.4%) was significantly higher than the occurrence of positive sera in cattle (5.1%), swine (2.9%), sheep (1.9%), dogs (1.9%), goats (0.5%), wildlife (0%), and humans (0.4%). The highest titer measured in horses was 1:512. The occurrence of positive sera in horses was related directly to age. In horses less than or equal to 1, 2 to 3,...
Equine onchocerciasis: lesions in the nuchal ligament of midwestern U.S. horses. Nuchal ligaments from midwestern U.S. horses infected with adult Onchocerca sp. were studied. The prevalence of Onchocerca sp. infection in horses increased with age. Ten percent of horses less than one year old were infected, 28% of horses one to five years old, 48% of horses six to 15 years old, and 90% of horses over 16 years old. Lesions in Onchocerca sp.-infected nuchal ligaments varied with age of the horse. Horses less than five years old had few or no lesions, whereas most horses six to 15 years old had focal mineralization and granuloma formation around adult worms. In infected nuchal...
Primary renal cell carcinoma in two horses. Of 2 horses with renal cell carcinoma, 1 had massive ascites but no other signs of urinary tract disease; the other had hematuria. In both horses, the tumors were palpable as large perirenal masses. The tumor mass of horse 1 almost completely replaced the left kidney, and there were tumor implants on the serosa of abdominal organs. The right kidney of horse 2 was compressed peripherally by the tumor, which completely filled the renal pelvis. The prevalence of renal cell carcinoma in horses and dogs necropsied at the New York State College of Veterinary Medicine between 1953 and 1976 was simila...
Salmonella infection in horses in England and Wales, 1973 to 1979. During the period 1973 to 1979 the number of recorded incidents of equine salmonellosis increased from 23 in 1973 to a peak of 111 incidents in 1976, but has since decreased to 32 in 1979. Of the 416 incidents recorded during the period of the survey 292 were caused by Salmonella typhimurium and 121 by 33 different serotypes; in three instances rough strains of salmonella were involved. The number of incidents caused by serotypes other than S typhimurium increased from one in 1973 to 32 in 1976. The number of different salmonella serotypes increased from two in 1973 to 23 in 1977 and has subse...
Prevalence of Strongylus vulgaris and Parascaris equorum in Kentucky thoroughbreds at necropsy. At necropsy of 49 Thoroughbreds from farms with generally good parasite control programs in central Kentucky, examination was specifically made for presence of Strongylus vulgaris in all of the horses and of Parascaris equorum in 21 of them. None of the deaths of the horses was caused by infections of internal parasites. Visceral arteries were examined for specimens of S vulgaris and lesions related to migrating stages of this parasite. Contents of the small intestines were examined for P equorum. Specimens of S vulgaris were recovered from 19 (39%) horses, and arterial lesions were observed i...
[Study of combined foci of mosquito-transmitted arbovirus infections]. A total of 5227 serum specimens from humans, horses and swine collected in the seasons of 1968--1976 in 15 administrative areas of the Primorskiy Kray were examined with antigens of a number of mosquito-borne arboviruses: Japanese encephalitis (JE), West Nile (WN), Getah, and Sindbis. Both independent and combined circulation of these viruses in the region was established. Sindbis virus was found to be circulating separately most frequently, West Nile virus the least frequently. According to the results of the serological analysis, the conditions for combined circulation are most closely relat...
[Prevalence of lungworm D. arnfieldi (Cobbold 1884) in donkeys in Denmark and in horses in herds together with donkeys (author’s transl)]. During a 5 months' period from January to May 1981 faecal samples of 176 donkeys from 59 herds all over the country were examined at the Institute of internal medicine, The Royal Veterinary and Agricultural University, Copenhagen. In addition, the investigation also included 106 horses from 30 of the donkey herds and 34 horses hospitalized with symptoms of dyspnoea and chronic coughing. In all, 87.5% of the donkeys were shown to excrete D. arnfieldi larvae, often in very high numbers, and the larval excretion was the only symptom of lungworm infection. There was no significant correlation betw...
Actinobacillus lignieresii infection after a horse bite. Perforation is the most serious complication of fibreoptic endoscopy.1
The commonest site of perforation during upper gastrointestinal
endoscopy is the oesophagus,' but predisposing factors have not been
fully documented. We report a retrospective survey of major endoscopy
units in the United Kingdom and attempt to identify the factors associated with oesophageal perforation.