Freqüência De Anticorpos Neutralizantes Contra O Herpesvírus Eqüino Tipo 1

Moreira, Nei; Weiss, Romildo Romualdo; Krüger, Ernesto Renato

doi:10.5380/rsa.v1i1.961

Cited by 6 publications

(5 citation statements)

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“…WEIBLEN et al (1994) relataram a ocorrência de um surto de abortos causado pelo EHV em propriedades do RS e MOREIRA et al (1998) detectaram o EHV-1 em 8% dos casos de aborto eqüino em SP. Além do isolamento viral, a detecção de anticorpos para o EHV confirma a disseminação do agente no rebanho eqüino brasileiro (VARGAS & WEIBLEN, 1991;MOREIRA et al, 2000;CUNHA et al, 2002;HEINEMANN et al, 2002). A detecção de anticorpos para o EHV (títulos entre 2 e 64) em 67 animais (4,5%) no presente estudo confirma a circulação do agente na população eqüina do Estado.…”

Section: Sorologiaunclassified

Prevalência de anticorpos contra os vírus da influenza, da arterite viral e herpesvírus em eqüinos do Estado do Rio Grande do Sul, Brasil

et al. 2006

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RESUMO O presente estudo teve como objetivo determinar a prevalência de anticorpos contra os vírus da influenza (EIV), da arterite viral (EVAV) e herpesvírus (EHV) em eqüinos no Estado do Rio Grande do Sul (RS), Palavras-chave: soroprevalência, epidemiologia, EIV, EVAV, EHV. ABSTRACT This study was aimed at investigating the prevalence of antibodies against, influenza virus (EIV), equine viral arteritis virus (EVAV), and herpesvirus (EHV) among horses in Rio Grande do Sul (RS) state, Brazil. Serum samples from horses of 65 counties of northern and northwestern RS, were tested by inhibition hemaglutination test (HI) for EIV and by virusneutralization test (VN) for EVAV and EHV antibodies. From 1506 samples, 986 (65.4%) had antibodies to EIV (titers ranging from 10 to 1280), 33 (2.2%) were positive to EVAV . Among the 65 counties, 55 (84.6%) presented at least one positive animal to EIV, 15 (23%) to EVAV, and 12 (18.5%)

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Section: Sorologiaunclassified

Prevalência de anticorpos contra os vírus da influenza, da arterite viral e herpesvírus em eqüinos do Estado do Rio Grande do Sul, Brasil

et al. 2006

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“…Sabe-se que a ampla distribuição do HVE no Brasil tem sido descrita na literatura científica, com ocorrências mais baixas que a observada em nosso estudo (32%) de [26] no Paraná e 0% (0/91) [32] e 4,5% (67/1506) [10] no Rio Grande do Sul.…”

Section: Resultsunclassified

Occurrence of Antibodies against Herpesvirus and Arteritis Virus in Equines from the State of Rio Grande do Norte, Brazil

Rocha

Diniz

Jesus

et al. 2020

Acta Scientiae. Vet.

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Background: Equine Herpesvirus type 1 (EHV-1) and Equine Arteritis Virus (EAV) have a high capacity for dissemination, causing losses in horse breeding due to reproductive, respiratory and neurological problems. In the State of Rio Grande do Norte there is only one survey, in the municipality of Mossoró, about these diseases. The purpose of this study was therefore to determine the prevalence and assess the risk factors associated with EHV-1 and EAV infections in unvaccinated horses raised in the mesoregions of East and West Potiguar in the State of Rio Grande do Norte, Brazil.Materials, Methods & Results: Between August 2018 and February 2019, blood samples were collected from equines on farms located in sixteen municipalities in the mesoregions of East and West Potiguar for the serological diagnosis of EAV (809 samples from 90 farms) and of EHV (778 samples from 88 farms), being that, only municipalities that had at least five hundred equines were included in the study. An investigative epidemiological questionnaire was applied to each property visited, containing questions related to the breeder, property, animal and the sanitary, reproductive and nutritional management. A logistic regression was performed to assess the risk factors associated with EVH, considering the serological test (positive or negative) as the dependent variable. EAV and EVH antibodies were detected through the serum virus neutralization assay. No evidence was found of EAV [0% (0/809)], but EHV showed a prevalence rate of 32% (249/778), with 80.6% (71/88) of the farms having at least one animal that tested positive, and EHV was present in all the municipalities covered in this study. The risk factors identified were: animals raised in East Potiguar (OR = 1.36, CI 95%: 1.01-1.85, P = 0.041), extensive livestock farming system (OR = 1.79, CI 95%: 1.10-2.91, P = 0.041), working animals (OR = 3.63, IC 95%: 1.91-6.91, P = 0.000), unclean facilities (OR = 2.32, CI 95%: 1.27-4.33, P = 0.006), and non-disinfected facilities (OR = 1.83, CI 95%: 1.15-2.91, P = 0.009).Discussion: The absence of horses seropositive for EAV confirms the findings reported for 132 cattle herding horses in the municipality of Mossoró, State of Rio Grande do Norte, Brazil, and by other national surveys that report zero or low occurrence rates. EAV is therefore considered an exotic disease that has not yet been diagnosed nor its etiological agent isolated in this country. EHV was found to be distributed in the two mesoregions, indicating a higher occurrence among working horses raised in the extensive livestock farming system on these farms, which were more physically fatigued and liable to be immunosuppressed, making them prone to infection, especially when left to graze in contact with other animals, although sports horses have also been found to be at high risk of becoming infected. The risk factor analysis also indicated the importance of hygiene and disinfection of livestock premises, where other biosafety measures such as quarantine and vaccination are likely not taken, and animals circulate unrestrictedly, facilitating the dissemination of the virus. Studies are therefore needed to shed light on the real situation of the presence of EAV throughout Brazil’s territory. On the other hand, EHV is widely disseminated throughout the state, and the risk factors for this disease not only underscore the importance of proper sanitary management for control of the disease but also serve as a warning to authorities and animal health professionals.

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“…As éguas acometidas podem permanecer assintomáticas ou apresentar sinais de infecção somente quando submetidas a condições de estresse (Wilson, 1997). Moreira, Weiss & Kruger (2000) ao testarem a incidência de contaminação por HEV-1 em equinos aparentemente sem sinais de infecção, através de titulação de anticorpos, obtiveram em um total de 229 amostras de soro sanguíneo de animais não vacinados contra rinopneumonite, 53 (17,7%) positivos para hespesvírus equino tipo 1. Cunha et al (2002) verificaram equinos sorologicamente positivos em rebanhos não vacinados, o índice de equinos apresentando anticorpos contra HVE-1, apresentou-se superior ao trabalho descrito anteriormente, sendo que a taxa de animais soropositivos foi de 27,2%.…”

Section: Laugier Et Alunclassified

Leading causes of pregnancy loss in the equine species: Review

Sena

Merchid²,

Almeida³

et al. 2016

Pubvet

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The pregnancy loss are common problems in the creation of equine, being the cause of concern among professionals, the numerous economic losses to the agribusiness sector. Early miscarriages are more incidents late, being attributed to maternal, environmental and embryonic factors. The factors include maternal reproductive tract changes, the mare's age, progesterone deficiency, when the cover reproductive status, failure in maternal recognition of pregnancy covering the foal heat, among others. Environmental factors include maternal stress, nutrition and effect of semen. Late pregnancy losses are fewer incidents and were attributed mainly to infectious disorders related to fetal-placental interactions, as ascending placentitis of origin. Equine herpesvirus type I and leptospirosis are the most common infectious causes, making essential health control and vaccination of the squad. Due to the alarming figures, the aim of this study, a literature review describing the main causes of pregnancy loss in the equine species.

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Freqüência De Anticorpos Neutralizantes Contra O Herpesvírus Eqüino Tipo 1

Cited by 6 publications

References 0 publications

Prevalência de anticorpos contra os vírus da influenza, da arterite viral e herpesvírus em eqüinos do Estado do Rio Grande do Sul, Brasil

Prevalência de anticorpos contra os vírus da influenza, da arterite viral e herpesvírus em eqüinos do Estado do Rio Grande do Sul, Brasil

Occurrence of Antibodies against Herpesvirus and Arteritis Virus in Equines from the State of Rio Grande do Norte, Brazil

Leading causes of pregnancy loss in the equine species: Review

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