scholarly journals The incidence of Neospora caninum in dairy cows with abortion and infertility problems

2021 ◽  
Author(s):  
Gaye BULUT ◽  
Hikmet ÜN ◽  
Gökçenur SANİOĞLU ◽  
İlker CAMKERTEN
Keyword(s):  
Dairy Cows ◽  
Neospora Caninum

scholarly journals Occurrence of abortions induced by Neospora caninum in dairy cattle from Santa Catarina, southern Brazil

2017 ◽  
Vol 26 (3) ◽  
pp. 292-298 ◽  
Author(s):  
Cesar Augusto Barbosa de Macedo ◽  
Madlaine Frigo Silveira Barbosa de Macedo ◽  
Ana Carolina Miura ◽  
Alessandra Taroda ◽  
Sergio Tosi Cardim ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
High Frequency ◽  
Neospora Caninum ◽  
Enzyme Linked Immunosorbent Assay ◽  
Southern Brazil ◽  
Chain Reaction ◽  
Santa Catarina ◽  
Tissue Samples ◽  
Polymerase Chain

Abstract The aim of the present study was to investigate the occurrence of N. caninum associated with abortions of dairy cattle from Santa Catarina state, southern Brazil by using enzyme-linked immunosorbent assay (ELISA), immunohistochemistry (IHC), and polymerase chain reaction (PCR). Blood from dairy cows that aborted along with intrathoracic fluid and tissue samples (brain, heart, liver, and lung) from their fetuses were collected and used for serology; PCR, histopathological, and immunohistochemistry (IHC) evaluations were also conducted. Twenty-one cows (51.2%) out of 41, and eight fetuses (26.7%) out of 30 were ELISA (HerdCheck, IDEXX) positive for N. caninum. Dams > 36 months of age had a higher risk of being serum positive than younger animals. PCR and IHC revealed that 38.8% (14/36) and 25.0% (9/36) of the fetuses were positive for N. caninum, respectively for each of the tests. Seropositive cows had a higher frequency of fetuses that were also positive by either intrathoracic fluid, PCR, or IHC. In summary, the present study observed a high frequency of N. caninum in abortions from dairy cows from southern Brazil, with a higher N. caninum prevalence found in cows that were older than 36 months. In addition, serology, PCR, and IHC should be used all together for better diagnosis of neosporosis in cattle.

Estimating the total economic costs of Neospora caninum infections in dairy cows in Turkey

2020 ◽  
Vol 52 (6) ◽  
pp. 3251-3258
Author(s):  
Pınar Ayvazoğlu Demir ◽  
Funda Eşki ◽  
Armağan E. Ütük
Keyword(s):  
Dairy Cows ◽  
Neospora Caninum ◽  
Economic Costs

Effects of crossbreeding on endocrine patterns determined in pregnant beef/dairy cows naturally infected with Neospora caninum

2015 ◽  
Vol 83 (4) ◽  
pp. 491-496 ◽  
Author(s):  
I. García-Ispierto ◽  
B. Serrano-Pérez ◽  
S. Almería ◽  
D. Martínez-Bello ◽  
A.F. Tchimbou ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Neospora Caninum

189 EFFECT OF NEOSPORA CANINUM INFECTION ON REPRODUCTIVE PARAMETERS OF DAIRY COWS

2010 ◽  
Vol 22 (1) ◽  
pp. 252 ◽  
Author(s):  
G. A. Pessoa ◽  
C. A. M. Silva ◽  
M. I. B. Rubin ◽  
F. S. F. Vogel ◽  
J. M. Trentin ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Production Systems ◽  
Neospora Caninum ◽  
Alternative Hypothesis ◽  
Fluorescent Antibody ◽  
Antibody Test ◽  
Ovarian Activity ◽  
Reproductive Parameters ◽  
Caninum Infection ◽  
Diarrhea Virus

The aim of this research was to determine the influence of Neospora caninum (NC) infection on reproductive parameters of Holstein dairy cows. The study was performed at 32 farms in the south of Brazil, latitude 27°30′S to 31°S and longitude 51°30′W to 55°30 W Farms included in this study met rigorous vaccination schedule for infectious bovine rhinotracheitis, bovine viral diarrhea virus, leptospirosis, and brucellosis. Blood samples collected from the dairy cows were submitted to serologic testing by an indirect fluorescent antibody test (IFAT) and were distributed into 2 groups: seropositive (GP; n = 160) and seronegative (GN; n = 558). The dogs (n = 51) of the farms were tested by IFAT. After abortion, fetuses were frozen at -80°C and submitted to PCR detection of NC in tissues. Seropositive cows that aborted were also tested by IFAT. Pregnancies of GP and GN cows were mon- itored by periodic ultrasound exams. After parturition or abortion all cows in GP and GN groups were submitted to gynecological exams. Cows that developed disease (clinical mastitis, metabolic disease, or laminitis) after parturition or abortion were excluded from the analysis to prevent any distortion of data. Farms were divided into 3 categories according to production technology, specifically, average milk production per cow per lactation: high (>25 kg), medium (15-25 kg), and low (< 15 kg). Data was analyzed by ANOVA using SAS® software (SAS Institute, Cary, NC, USA) at a level of 5% significance and Student’s t-test for average reproductive parameters. The alternative hypothesis of the study was that at least 1 reproductive parameter was influenced in GP after abortion compared with GN cows that aborted. The null hypothesis was that there was no influence of NC antibody titer on reproductive parameters. The prevalence of antibody for NC in dairy cows was 24.48%. There was no prevalence difference among production systems (P > 0.05). The prevalence in dogs was 48.6% and did not differ among production systems. Fifty-nine (41.37%) NC-seropositive cows aborted. This differs significantly from the seronegative cow abortion rate (n = 17; 2.6%; P < 0.001). Occurrence of retained fetal membranes (RFM), endometritis, absence of uterine infection after abortion, and days between abortion and first estrus can be observed in Table 1. Abortion occurred between the fifth and eighth month of pregnancy. Occurrence of RFM was more frequent in cows that were seropositive. The period between abortion and first estrus was 79.06 v. 65.8 days for seropositive and seronegative groups, respectively, which differed significantly (P < 0.001). The results suggest that the higher occurrence of RFM after abortion in dairy NC-seropositive cows affects uterine involution, resulting in a delay of ovarian activity. Table 1.Neospora caninum seropositive and seronegative cows that aborted and their reproductive parameters. This study was supported by CNPq graduate funding.

Neospora caninum seropositivity and association with abortions in dairy cows in Mexico

2005 ◽  
Vol 134 (1-2) ◽  
pp. 61-65 ◽  
Author(s):  
Z. Garcia-Vazquez ◽  
R. Rosario-Cruz ◽  
A. Ramos-Aragon ◽  
C. Cruz-Vazquez ◽  
G. Mapes-Sanchez
Keyword(s):  
Dairy Cows ◽  
Neospora Caninum

Neospora caninum infections in bovine foetuses and dairy cows with abortions in Argentina

1999 ◽  
Vol 29 (10) ◽  
pp. 1705-1708 ◽  
Author(s):  
M.C Venturini ◽  
L Venturini ◽  
D Bacigalupe ◽  
M Machuca ◽  
I Echaide ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Neospora Caninum

Dynamics of anti-Neospora caninum antibodies during gestation in chronically infected dairy cows

2007 ◽  
Vol 148 (3-4) ◽  
pp. 193-199 ◽  
Author(s):  
C. Nogareda ◽  
F. López-Gatius ◽  
P. Santolaria ◽  
I. García-Ispierto ◽  
G. Bech-Sàbat ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Neospora Caninum

Neospora caninum: Serological follow-up in dairy cows during pregnancy

2006 ◽  
Vol 137 (3-4) ◽  
pp. 222-230 ◽  
Author(s):  
Barbara Häsler ◽  
Jorge A. Hernandez ◽  
Martin Reist ◽  
Heinz Sager ◽  
Christine Steiner-Moret ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Neospora Caninum

scholarly journals Association between Neospora caninum seropositivity and reproductive disorders in girolando cows

2020 ◽  
Vol 72 (6) ◽  
pp. 2069-2076
Author(s):  
V.G. Gaia ◽  
G.F. Grillo ◽  
M.R.B. Mello ◽  
H.B. Palhano ◽  
A.F. Silva
Keyword(s):  
Dairy Cows ◽  
Neospora Caninum ◽  
Antibody Test ◽  
Fisher Exact Test ◽  
Indirect Fluorescence Antibody Test ◽  
Reproductive Disorders ◽  
Blood Samples ◽  
Exact Test ◽  
Clinical Observations ◽  
Indirect Fluorescence Antibody

ABSTRACT The aim of this study was to investigate the presence of anti-Neospora caninum antibodies in Girolando cows, in order to evaluate the association between seropositivity and reproductive disorders. Blood samples were collected from 40 dairy cows in their reproductive phase from the cranial superficial epigastric vein. The blood samples were tested using the Indirect Fluorescence Antibody Test (IFAT) to detect anti-N.caninum antibodies. The serological results were used to verify whether there was any association with the manifestation of reproductive disorders based on data from the records of reproductive history from 2017 to 2018 as well as the clinical observations of the herd throughout this study. The Fisher exact test was used to verify the existence of an association between the serology and reproductive disorders, adopting a 95% confidence level. The serological results showed a 27.5% seroprevalence in the herd for N. caninum, however, after statistical analysis, no association between seropositivity and reproductive disorders was found in the evaluated herd. Although the studied population is infected with Neospora caninum, we can infer that anti-Neospora caninum antibodies present in Girolando dairy cows at the UFRRJ Dairy Cattle Facility are not associated with the occurrence of reproductive disorders.

Sign in / Sign up

Export Citation Format

Share Document