Annual incidence, prevalence and transmission characteristics of Streptococcus agalactiae in Danish dairy herds

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Annual incidence, prevalence and transmission characteristics of Streptococcus agalactiae in Danish dairy herds. / Mweu, Marshal M.; Nielsen, Søren S. ; Hisham Beshara Halasa, Tariq; Toft, Nils.

In: Preventive Veterinary Medicine, Vol. 106, No. 3-4, 2012, p. 244–250.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Mweu, Marshal M.; Nielsen, Søren S. ; Hisham Beshara Halasa, Tariq; Toft, Nils / Annual incidence, prevalence and transmission characteristics of Streptococcus agalactiae in Danish dairy herds.

In: Preventive Veterinary Medicine, Vol. 106, No. 3-4, 2012, p. 244–250.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{4d38c37cc14d4055bcacc9064b0ce24a,
title = "Annual incidence, prevalence and transmission characteristics of Streptococcus agalactiae in Danish dairy herds",
keywords = "Streptococcus agalactiae, Incidence, Prevalence, Parameters, Transmission, Cattle",
publisher = "Elsevier BV",
author = "Mweu, {Marshal M.} and Nielsen, {Søren S.} and {Hisham Beshara Halasa}, Tariq and Nils Toft",
year = "2012",
doi = "10.1016/j.prevetmed.2012.04.002",
volume = "106",
number = "3-4",
pages = "244–250",
journal = "Preventive Veterinary Medicine",
issn = "0167-5877",

}

RIS

TY - JOUR

T1 - Annual incidence, prevalence and transmission characteristics of Streptococcus agalactiae in Danish dairy herds

A1 - Mweu,Marshal M.

A1 - Nielsen,Søren S.

A1 - Hisham Beshara Halasa,Tariq

A1 - Toft,Nils

AU - Mweu,Marshal M.

AU - Nielsen,Søren S.

AU - Hisham Beshara Halasa,Tariq

AU - Toft,Nils

PB - Elsevier BV

PY - 2012

Y1 - 2012

N2 - Contagious mastitis pathogens continue to pose an economic threat to the dairy industry. An understanding of their frequency and transmission dynamics is central to evaluating the effectiveness of control programmes. The objectives of this study were twofold: (1) to estimate the annual herd-level incidence rates and apparent prevalences of Streptococcus agalactiae (S. agalactiae) in the population of Danish dairy cattle herds over a 10-year period from 2000 to 2009 inclusive and (2) to estimate the herd-level entry and exit rates (demographic parameters), the transmission parameter, β, and recovery rate for S. agalactiae infection.<br/><br/>Data covering the specified period, on bacteriological culture of all bulk tank milk samples collected annually as part of the mandatory Danish S. agalactiae surveillance scheme, were extracted from the Danish Cattle Database and subsequently analysed. There was an increasing trend in both the incidence and prevalence of S. agalactiae over the study period. Per 100 herd-years the value of β was 54.1 (95% confidence interval [CI] 46.0–63.7); entry rate 0.3 (95% CI 0.2–0.4); infection-related exit rate 7.1 (95% CI 5.6–8.9); non-infection related exit rate 9.2 (95% CI 7.4–11.5) and recovery rate 40.0 (95% CI 36.8–43.5). This study demonstrates a need to tighten the current controls against S. agalactiae in order to lower its incidence.

AB - Contagious mastitis pathogens continue to pose an economic threat to the dairy industry. An understanding of their frequency and transmission dynamics is central to evaluating the effectiveness of control programmes. The objectives of this study were twofold: (1) to estimate the annual herd-level incidence rates and apparent prevalences of Streptococcus agalactiae (S. agalactiae) in the population of Danish dairy cattle herds over a 10-year period from 2000 to 2009 inclusive and (2) to estimate the herd-level entry and exit rates (demographic parameters), the transmission parameter, β, and recovery rate for S. agalactiae infection.<br/><br/>Data covering the specified period, on bacteriological culture of all bulk tank milk samples collected annually as part of the mandatory Danish S. agalactiae surveillance scheme, were extracted from the Danish Cattle Database and subsequently analysed. There was an increasing trend in both the incidence and prevalence of S. agalactiae over the study period. Per 100 herd-years the value of β was 54.1 (95% confidence interval [CI] 46.0–63.7); entry rate 0.3 (95% CI 0.2–0.4); infection-related exit rate 7.1 (95% CI 5.6–8.9); non-infection related exit rate 9.2 (95% CI 7.4–11.5) and recovery rate 40.0 (95% CI 36.8–43.5). This study demonstrates a need to tighten the current controls against S. agalactiae in order to lower its incidence.

KW - Streptococcus agalactiae

KW - Incidence

KW - Prevalence

KW - Parameters

KW - Transmission

KW - Cattle

U2 - 10.1016/j.prevetmed.2012.04.002

DO - 10.1016/j.prevetmed.2012.04.002

JO - Preventive Veterinary Medicine

JF - Preventive Veterinary Medicine

SN - 0167-5877

IS - 3-4

VL - 106

SP - 244

EP - 250

ER -