English Translation, Synonyms, Definitions and Usage Examples of Spanish Word ‘virus fiebre catarral maligna’. malignant catarrhal fever virus; nematode infections; molybdenum; paratuberculosis; senecio; salmonellosis; diarrhee; carcinome; virus fiebre catarral maligna. Virus fiebre catarral maligna · Virus de la coriza gangrenosa · Fiebre catarral Virus della febbre catarrale maligna, it. 悪性カタル熱ウイルス, ja.
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Veterinary Medical Center, Williamsburg, Iowa. Mention of trade names or commercial products in this article is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the authors.
An outbreak of porcine malignant catarrhal fever in a farrow-to-finish swine farm in the United States. J Swine Health Prod. Also available as a PDF. M alignant catarrhal fever MCF is a systemic, often fatal lymphoproliferative disease of the ruminant families Bovidae and Cervidae. Two endemic forms of MCF are recognized and include a wildebeest-associated form caused by alcelaphine herpesvirus type 1 AlHV-1 and a sheep-associated form caused by the ovine herpesvirus type 2 OvHV However, in ruminants other than the reservoir hosts, the two forms of MCF are clinically and pathologically indistinguishable.
Recently, the first two cases of sheep-associated MCF were diagnosed in adult swine in the United States. The case farm consisted of adult swine located on a farrow-to-finish, specific-pathogen-free purebred seedstock operation with Chester White, Duroc, Yorkshire, and Berkshire breeds.
Each of the 2. Individual gestation crates were not used. The premise included a head nursery and two finishing facilities: Additional livestock present at the time of the outbreak included a small flock of 43 sheep consisting of ewes, lambs, and one ram, various numbers of rabbits, ducks, and geese, and one cat. In early Januarythe owner placed nine ewe lambs approximately 10 to 12 months of age in the G-barn alleyway due to inclement weather and to reduce feed competition with older ewes.
The ewe lambs were supplied their own water source, maintained on a hay and grain diet, and were fed at one end of the G-barn alley. Gated pens with vertical steel bars allowed ample nose-to-nose contact between the sheep and adult swine housed in the G-barn, which consisted of 35 gilts and approximately 85 multiparous sows and boars penned according to age and sex. The sheep were removed from the G-barn the first week of March and the alley was cleaned but not disinfected.
Clinical signs began March 20, Forty-one adult swine became clinically affected over the next 6 months. Clinical signs included pyrexia, anorexia, and lethargy.
Clinical signs typically developed 24 to 48 hours before death, although 22 animals recovered. Individual animals were nonresponsive to treatment with injectable antibiotics, and an insignificant response resulted from two subsequent mass treatments with feed-grade antibiotics. Sporadic death loss extending over 6 months began with a parity sow and a boar.
Mortality and morbidity that occurred over the next 5 months are shown in Table 1. The herd veterinarian began a diagnostic investigation on April 24,with a serological profile. Clinical disease was described as anorexia, lethargy, and sudden death.
All 41 affected animals were housed in the G-barn; swine in the nursery and finisher barns were unaffected. Gross necropsy findings were nonspecific and included diffuse pulmonary cataral with interlobular edema. Aerobic and anaerobic bacterial cultures, which included enrichment for Erysipelothrix rhusiopathiaewere negative.
Additional tests for Leptospira interrogans serovars, bovine virus diarrhea virus, novel porcine pestivirus-like virus agent X14 classical swine fever, and pseudorabies virus were negative.
Histopathologic lesions were similar in all tissue samples and included marked perivascular inflammation and mononuclear vasculitis in multiple tissues including the brain Figure 1lung Figure 2liver Figure 3kidney Malign 4heart, lymph node, and uterus. Rarely, affected blood vessels were necrotic with hyalinized vascular walls Figure 1.
Sporadic abortions began in May, approximately 4 months post initial exposure to sheep, at to days of gestation and 1 to 2 days after the onset of clinical signs. A final diagnostic submission of a month-old female swine on August 25,revealed no gross lesions. Histopathology revealed lymphocytic catarrla in multiple tissues, consistent with a lymphoproliferative disease. A positive result confirmed a diagnosis of sheep-associated MCF.
Nucleotide comparison between a sequenced polymerase chain reaction PCR amplicon from a conventional semi-nested ovine herpesvirus type 2 PCR 15 performed on a swine brain homogenate and a sequence of the kda tegument protein gene of ovine herpesvirus type 2 available in GenBank accession no.
Two individual and sporadic cases of sheep-associated MCF in swine were previously described in the United States. The New York pig was located on an animal rescue farm, and the Kentucky case involved a pregnant sow housed in a high-school agricultural facility.
Affected animals in both cases were either located on the same farm with, or housed with, two additional pigs and three adult sheep in separate pens that were allowed nose-to-nose contact for an unknown length of time. The additional two pigs on the Kentucky farm presented with similar clinical signs but recovered.
The clinical signs and pathologic lesions in this case were similar to those described in previous reports of Catarrral in pigs. Neurological signs and corneal opacity have been previously reported in pigs with MCF, but were not recognized in this outbreak despite the catarfal of histopathologic lesions in the brain. Macroscopic lesions identified during post mortem examination of three swine submitted to the ISU-VDL were subtle, nonspecific, and consisted of pulmonary congestion and interlobular edema.
El aborto en los bovinos
Microscopic lesions were consistent with those of MCF and consisted of mononuclear vasculitis cayarral acute cases and a multisystemic lymphoproliferative disease in subacute to chronic cases. The pathogenesis of MCF in pigs has not been elucidated, although contact with sheep has been consistently documented as a precursor to clinical signs and infection.
Nasal shedding commonly occurs in adolescent sheep 6 to 10 months of age; 16 however, adult sheep may intermittently shed large quantities of virus from nasal secretions.
Incubation periods in cattle post experimental inoculation have ranged catarrral 2 to 12 weeks. However, it is unknown if the virus was transmitted via sheep nasal secretions or fecal material. Malignant catarrhal fever infection in swine is usually sporadic, and there have been few reports of outbreaks. The previous lack of available serological and molecular diagnostic tests may have also resulted in under-reporting of this disease.
In contrast, previous reports 6,13 have commented that the absence of porcine cases may be due to differences in production systems that prevent transmission of the virus or minimize exposure to sheep. Interestingly, a recent maliga detected the presence of infected but asymptomatic swine even in the absence of known exposure to sheep or goats.
Diagnosing MCF is challenging due to the nonspecific nature of the clinical signs. The peroxidase-linked antibody test is a nonspecific test which detects antibody to the Herpesviridae malitna. The competitive-inhibition ELISA is the most useful serological test, as it specifically detects anti-MCF antibody in swine; 18 however, the presence of antibody confirms exposure to the virus and is not diagnostic for disease.
The current report describes an outbreak of MCF in a farrow-to-finish swine operation involving exposure to sheep and subsequent clinical signs and death in multiple adult swine. Due to the lack of MCF vaccines, exposure between sheep and pigs should be avoided to prevent transmission of the disease. Malignant catarrhal fever should remain a differential diagnosis in swine exposed to sheep and clinically exhibiting lethargy, anorexia, and fever.
Malignant catarrhal fever virus. Dinter Z, Morein B, eds. Virus Infections of Ruminants. New York, New York: Elsevier Science Publishers BV; An epizootic of malignant catarrhal fever in a large captive herd of white-tailed deer Odocoileus virginianus.
Differential diagnosis of diarrhoea in adult cattle 
Epizootic malignant catarrhal fever in three bison herds: J Vet Diagn Invest. Malignant catarrhal fever caused by ovine feibre in pigs in Norway. Identification and quantification of ovine gammaherpesvirus 2 DNA in fresh and stored tissues of pigs with symptoms of porcine malignant catarrhal fever. Malignant catarrhal fever in pigs and a genetic comparison of porcine and ruminant virus isolates in Finland.
Okkenhaug H, Kjelvik O.
Fall av akut vaskulit hos svin pavisade i Sverige [Acute vasculitis among swine in Catarfal. A malignant catarrhal fever-like syndrome in sows. Naturally occurring sheep-associated malignant catarrhal fever in North American pigs. Isolation of a novel viral agent associated with porcine reproductive and neurological syndrome and reproduction of the disease.
Quantitative fluorogenic PCR assay for measuring ovine herpesvirus 2 fibere in sheep. Clin Diagn Lab Immunol. Levels of ovine herpesvirus 2 DNA in nasal secretions and blood of sheep: Infection with Ovine herpesvirus 2 in Norwegian herds with a history of previous outbreaks of malignant catarrhal fever. A simpler, more sensitive competitive inhibition enzyme-linked immunosorbent assay for detection of antibody to malignant catarrhal fever viruses.
PCR detection of catadral sheep-associated agent of malignant catarrhal fever.
Case report Peer reviewed An outbreak of porcine malivna catarrhal fever in a farrow-to-finish swine farm in the United States. Un brote de fiebre catarral maligna porcina en una granja porcina de ciclo completo localizada en los Estados Unidos. Summary Malignant catarrhal fever is a sporadic, often fatal viral disease affecting multiple species, including swine.
Ovine herpesvirus type 2 OvHV-2the cause of sheep-associated malignant catarrhal fever, incites nonspecific clinical signs and occasional death in swine.
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An outbreak of malignant catarrhal fever in a farrow-to-finish swine farm in the United States was confirmed by identifying OvHV-2 DNA in two clinically affected adult swine previously exposed to sheep.
Forty-one swine exhibited clinical signs of lethargy, anorexia, and fever, with recovery or death in 22 and 19 animals, respectively. Abortion was also reported in two clinically affected pregnant females.
Porcine malignant catarrhal fever is difficult to diagnose due to the nonspecific clinical signs, rarity of occurrence, and sporadic nature of the disease. Polymerase chain reaction assays and serologic testing are available to assist in an accurate diagnosis. Veterinarians should consider malignant catarrhal fever a potential differential diagnosis in swine with poorly defined clinical signs, intermittent death, and previous exposure to sheep.