Prevalence of endemic enteropathogens of calves in New Zealand dairy farms

Mawly, Julanda Al; Grinberg, A; Prattley, D. J.; Moffat, JR; French, Nigel P.

doi:10.1080/00480169.2014.966168

Cited by 45 publications

(36 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Prevalences of CS31A (17.5%) and F17 (31.2%) genes were in accordance with those from previous reports in France, New Zealand, Iran, and in countries of the region such as Argentina and Brazil, but the F5 gene was less prevalent (< 1%) in the present study [17,[28][29][30][31]. These results are in accordance with a study by Kolenda et al, who reported a significant F5 prevalence reduction over the last decades [28].…”

Section: Discussionsupporting

confidence: 83%

Prevalence of Escherichia coli adhesion-related genes in neonatal calf diarrhea in Uruguay

Umpiérrez

Acquistapace²,

Fernández³

et al. 2016

J Infect Dev Ctries

View full text Add to dashboard Cite

Introduction: Neonatal calf diarrhea (NCD), one of the most important diseases of neonatal dairy and beef calves in Uruguay, has become relevant in association with intensive systems. This disease generates substantial economic losses every year worldwide as a result of increased morbidity and mortality. Escherichia coli, one of the pathogens associated with NCD, can express several fimbrial and afimbrial adhesins. The objective of this study was to assess the presence of clpG, f5, f17A, f17G(II), and f17G(I) genes that encode three important adhesins expressed in diarrheagenic E. coli: F5, F17 and CS31A, isolated from feces of calves in Uruguay. Methodology: Feces of 86 (70 diarrheic and 16 healthy) calves, from 15 animal facilities in Uruguay, were collected between 2012 and 2013. Biochemical and molecular identification were performed to finally obtain 298 E. coli isolates. Partial amplification of adhesion-related genes was performed by polymerase chain reaction. Results: The most prevalent gene was f17A (31.2%), followed by f17G(II), clpG, f17G(I) and f5 (25.8%, 17.5%, 3.7% and 0.7%, respectively). All genes were present in diarrheic and healthy animals except f5 and f17G(I); these genes were present only in affected calves, although in low numbers. Conclusions: This is the first report of the presence of F5, F17, and CS31A genes in E. coli strains from NCD cases in Uruguay. Prevalence values of the genes, except f5, were in accordance with regional findings. It is expected that further characterization of locally transmitted strains will contribute to control a problem of regional and international magnitude.

show abstract

Section: Discussionsupporting

confidence: 83%

Prevalence of Escherichia coli adhesion-related genes in neonatal calf diarrhea in Uruguay

Umpiérrez

Acquistapace²,

Fernández³

et al. 2016

J Infect Dev Ctries

View full text Add to dashboard Cite

show abstract

“…In one study, the prevalence of salmonellosis in preweaned calves was reported to be higher in group pen calves than those in individual pens . Contrary, some studies failed to identify an effect of management and infrastructure variables on the presence of enteropathogens in calves . This study was not designed to evaluate farm‐level differences, something that would warrant further investigation.…”

Section: Discussionmentioning

confidence: 94%

“…Regarding the influence that farm management practices can have on the prevalence of infectious diseases, contradictory results have reported . In one study, the prevalence of salmonellosis in preweaned calves was reported to be higher in group pen calves than those in individual pens .…”

Section: Discussionmentioning

confidence: 99%

Detection of Bovine Coronavirus in Healthy and Diarrheic Dairy Calves

Gómez

Arroyo

Poljak

et al. 2017

Veterinary Internal Medicne

View full text Add to dashboard Cite

Background BCoV is identified in both healthy and diarrheic calves, complicating its assessment as a primary pathogen.ObjectivesTo investigate the detection rates of bovine coronavirus (BCoV) in feces of healthy and diarrheic calves and to describe the usefulness of a pancoronavirus reverse transcriptase (RT) PCR (PanCoV‐RT‐PCR) assay to identify BCoV in samples of diarrheic calves.AnimalsTwo hundred and eighty‐six calves <21 days. Calves with liquid or semiliquid feces, temperature >39.5°C, and inappetence were considered as cases, and those that had pasty or firm feces and normal physical examination were designated as controls.MethodsProspective case–control study. A specific BCoV‐RT‐PCR assay was used to detect BCoV in fecal samples. Association between BCoV and health status was evaluated by exact and random effect logistic regression. Fecal (n = 28) and nasal (n = 8) samples from diarrheic calves were tested for the presence of BCoV by both the PanCoV‐RT‐PCR and a specific BCoV‐RT‐PCR assays. A Kappa coefficient test was used to assess the level of agreement of both assays.Results BCoV was detected in 55% (157/286) of calves; 46% (66/143), and 64% (91/143) of healthy and diarrheic calves, respectively. Diarrheic calves had higher odds of BCoV presence than healthy calves (OR: 2.16, 95% CI: 1.26 to 3.83, P = 0.004). A good agreement between PanCoV‐RT‐PCR and BCoV‐RT‐PCR to detect BCoV was identified (κ = 0.68, 95% CI: 0.392 to 0.967; P < 0.001).Conclusions and Clinical Importance BCoV was more likely to be detected in diarrheic than healthy calves. The PanCoV‐RT‐PCR assay can be a useful tool to detect CoV samples from diarrheic calves.

show abstract

“…The incidence of BCoV varies between 15% and 70% in naturally occurring outbreaks worldwide 25,27,31 . In the Southern hemisphere, Al Mawly et al 1 detected a BCoV prevalence of 14% during 2011 calving season in dairy farms in New Zealand. Additionally, Stipp et al 26 and Lorenzetti 37 reported 15.6% and 33.3% of BCoV PCR-detection rates in diarrheic calves from dairy and beef farms in Brazil in 2009 and 2013 respectively.…”

Section: Introductionmentioning

confidence: 99%

Passive immunity to control Bovine coronavirus diarrhea in a dairy herd in Argentina

Bok¹,

Alassia²,

Frank³

et al. 2018

Revista Argentina de Microbiología

View full text Add to dashboard Cite

Bovine coronavirus (BCoV) is a viral enteric pathogen associated with calf diarrhea worldwide being, in Argentina, mostly detected in dairy husbandry systems. The aim of the present work was to study if maternal IgG1 antibodies (Abs) to BCoV acquired by colostrum intake modulate the development of BCoV infection in calves reared in a dairy farm in Argentina. Thirty Holstein calves were monitored during their first 60 days of age. Animals were classified into two groups depending on their initial BCoV IgG1 Ab titers. The "failure of passive transfer" (FPT) group had significantly lower IgG1 Abs to BCoV than the "acceptable passive transfer" (APT) group of calves (log10 1.98 vs. 3.38 respectively) (p<0.0001). These differences were also observed when the total protein levels in both groups were compared (p=0.0081). Moreover, 71% (5/7) of calves from the FPT group showed IgG1 seroconversion to BCoV compared to 29.4% (5/17) of animals from the APT group. Regarding viral circulation, BCoV was detected in 10% (3/30) of all calves and BCoV IgG1 Ab seroconversion was detected in 42% of the total animals showing that almost half of the calves were infected with BCoV. In conclusion, calves with high titers of specific BCoV IgG1 (≥1024) were mostly protected against viral infection, while animals with low titers of IgG1 (<1024) were mostly infected with BCoV. IgG1 Abs from colostrum origin are critical for prevention of BCoV infection.

show abstract

Prevalence of endemic enteropathogens of calves in New Zealand dairy farms

Abstract: This study provides epidemiological estimates of the prevalence of calves' enteropathogens in New Zealand, which could be used for infection risk assessment or estimation of the environmental loads of pathogens shed in cattle faeces.

Cited by 45 publications

References 24 publications

Prevalence of Escherichia coli adhesion-related genes in neonatal calf diarrhea in Uruguay

Prevalence of Escherichia coli adhesion-related genes in neonatal calf diarrhea in Uruguay

Detection of Bovine Coronavirus in Healthy and Diarrheic Dairy Calves

Passive immunity to control Bovine coronavirus diarrhea in a dairy herd in Argentina

Contact Info

Product

Resources

About