Seroprevalence of and risk factors for Neospora caninum infection in yaks ( Bos grunniens ) in China

2017 ◽  
Vol 242 ◽  
pp. 22-23 ◽  
Author(s):  
Qing-Feng Meng ◽  
Gui-Zhe Yao ◽  
Si-Yuan Qin ◽  
Jian Wu ◽  
Xi-Chen Zhang ◽  
...  
Author(s):  
José Luis Salguero-Romero ◽  
Dora Romero-Salas ◽  
Anabel Cruz-Romero ◽  
Miguel A. Alonso-Díaz ◽  
Mariel Aguilar-Domínguez ◽  
...  

2020 ◽  
Vol 14 (1) ◽  
pp. 30-35
Author(s):  
Samara dos Santos Silva ◽  
Leonardo Vinícius Silva de Oliveira ◽  
Radabley Rith Almeida de Oliveira ◽  
Émerson Timóteo de Alcântara ◽  
Pollyanne Raysa Fernandes de Oliveira ◽  
...  

2019 ◽  
Vol 67 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Jesús Manuel Romo-Gallegos ◽  
Carlos Cruz-Vázquez ◽  
Leticia Medina-Esparza ◽  
Miguel Ramos-Parra ◽  
Dora Romero-Salas

This study, carried out in 13 sheep flocks of central-western Mexico, aimed to identify the prevalence of anti-N. caninum antibodies, to develop a risk analysis of the infection and to estimate the prevalence of parasite DNA in blood. A total of 368 serum and blood samples were subjected to ELISA and PCR tests, respectively, and the association between the prevalence of antibodies and some management factors was estimated. The overall prevalence of anti-N. caninum antibodies was 13.5% [50/368; 95% confidence interval (CI) 10–17], ranging from 2.7 to 90% per flock, and 92% of the farms had seropositive animals. In ewes the prevalence was 14% (48/348, 95% CI 10–17) and in rams 10% (2/20; 95% CI 1– 33). The mean prevalence of Neospora DNA in blood was 27% (99/368, 95% CI 22–31), implying a range between 16 and 82%. In rams, the prevalence was 5% (1/20 95% CI 2–26), while in ewes it was 28% (98/348, 95% CI 23–33). The agreement between the tests was k = 0.19. The presence of other domestic animal species in the farms [odds ratio (OR) 4.4] and the consumption of placental debris, fetuses and stillborn lambs by dogs living in the farms (OR 5.8) were demonstrated to be risk factors.


Parasite ◽  
2019 ◽  
Vol 26 ◽  
pp. 32 ◽  
Author(s):  
Xiang Gao ◽  
Hongbin Wang

Although Neospora caninum is an important veterinary pathogen, veterinarians in various areas including in Mainland China lack a full understanding of neosporosis distribution in dog populations. This study aims to determine the emergence of anti-N. caninum antibodies in canine populations classified based on breeders, herdsmen, and huntsmen in northeast mainland China. In addition, the risk factors associated with seropositivity were explored. An indirect immunofluorescent antibody test (IFAT) was performed on canine serum to determine seroprevalence. Logistic regression models were used to collect and analyze individual and management data, in order to determine high-reliability predictors of seroprevalence as well as the level of anti-N. caninum antibodies. Among the 476 dogs tested, 95 (20%) were seropositive. Mixed breed (OR 1.53), former strays (OR 1.38), dogs living on cattle farms (OR 2.30), hunting dogs (OR 1.22) as well as raw meat feeding (OR 1.66) were correlated (p < 0.05) with N. caninum infection. Interestingly, the seropositivity of dogs on cattle farms was higher (28%) than that of those (24.8%) living in breeding facilities (p < 0.05). A large number of seropositive dogs were found on cattle farms in the study region, suggesting horizontal transmission between dogs and cattle. Therefore, this source of infection should be studied further, and should be a strong consideration in differential diagnoses of dogs raised on cattle farms.


Author(s):  
Poliana de Jesus Souza Venturoso ◽  
Osvaldo Juliatti Venturoso ◽  
Gisele Glomba Silva ◽  
Maerle Oliveira Maia ◽  
Rute Witter ◽  
...  

Abstract Neospora caninum is considered to be one of the main causes of abortion among cattle. The present survey was conducted in the municipality of Rolim de Moura, Rondônia State, Brazil. A questionnaire that investigates the epidemiological aspects of neosporosis was used in the analysis of risk factors associated with the animal-level and herd-level prevalence in dairy cattle. A total of 416 bovine blood samples were collected from 30 farms, and N. caninum antibody levels were measured by Indirect Fluorescent Antibody Test (IFAT). Analysis of dairy cattle serum samples revealed the presence of anti-N. caninum antibodies to be 47.36% (n = 197). Risk factors associated with N. caninum infection were the management system and access locations of dogs. The results of the present survey indicated that infection of dairy cattle with N. caninum is widespread in the studied region of Western Amazon, which has implications for prevention and control of neosporosis in this region. Therefore, integrated control strategies and measures are recommended to prevent and control N. caninum infection in dairy cattle. In addition, direct contact between dairy cattle, dogs and wild animals, which can influence the epidemiology of neosporosis, should be investigated further.


2021 ◽  
Author(s):  
Valeria Analía Sander ◽  
Luisa F. Mendoza Morales ◽  
Valentina Lagorio ◽  
Mariana G. Corigliano ◽  
Edwin Sanchez-Lopez ◽  
...  

2015 ◽  
Vol 22 (4) ◽  
pp. 677-679 ◽  
Author(s):  
Tereza Machacova ◽  
Eva Bártová ◽  
Kamil Sedlak ◽  
Marie Budikova ◽  
Alessandra Piccirillo

2008 ◽  
Vol 152 (1-2) ◽  
pp. 148-151 ◽  
Author(s):  
E. Collantes-Fernández ◽  
M. Gómez-Bautista ◽  
G. Miró ◽  
G. Álvarez-García ◽  
J. Pereira-Bueno ◽  
...  

Parasite ◽  
2018 ◽  
Vol 25 ◽  
pp. 15 ◽  
Author(s):  
Shuai Wang ◽  
Lingjuan Li ◽  
Yi Lu ◽  
Haizhu Zhang ◽  
Qing Xie ◽  
...  

This study aimed to determine the frequency of antibodies to Neospora caninum in domestic sheep raised in Henan province, central China. Serum samples from 779 domestic sheep were collected from March 2015 to May 2016, and antibodies to N. caninum were evaluated using an enzyme-linked immunosorbent assay (ELISA). The results showed an overall IgG positive rate of 7.32% (57/779). The risk factors significantly related to seropositivity to N. caninum in sheep were the age, the presence of dogs, and the rearing system. This is the first report of N. caninum infection and associated risk factors in domestic sheep in central China.


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