Environmental factors affecting somatic cells counts in milk from small dairies in Southern Brazil

G. Noro; J.W. Dürr; F.H.D. González; R. Campos

Environmental factors affecting somatic cells counts in milk from small dairies in Southern Brazil

In: Mastitis in dairy production

Authors:

G. Noro

G. Noro ¹Cooperativa Cotribá, Ibirubá (RS), Brazil

Search for other papers by G. Noro in
Current site
Google Scholar
PubMed

J.W. Dürr

J.W. Dürr ²Faculdade de Agronomia e Medicina Veterinária, UPF, Passo Fundo (RS), Brazil

Search for other papers by J.W. Dürr in
Current site
Google Scholar
PubMed

F.H.D. González

F.H.D. González ³Faculdade de Veterinária, UFRGS, Porto Alegre (RS), Brazil

Search for other papers by F.H.D. González in
Current site
Google Scholar
PubMed

, and

R. Campos

R. Campos ³Faculdade de Veterinária, UFRGS, Porto Alegre (RS), Brazil

Search for other papers by R. Campos in
Current site
Google Scholar
PubMed

Type:: Chapter

Pages:: 716–721

DOI:: https://doi.org/10.3920/9789086865505_109

Purchase instant access (PDF download and unlimited online access):

€42.00€35.00 excl. VAT

Add to Cart

Redeem Access Token

Although somatic cell counts (SCC) in milk have been widely used as a subclinical mastitis monitoring tool, only a small number of dairy herds in developing countries have adopted this technology in a routinely basis. The objective of this research was to evaluate the impact of environmental effects on SCC in milk from small dairies in Southern Brazil. Milk recording data from 259 dairy herds associated to four cooperatives in Rio Grande do Sul state were collected from January 1998 to July 2003, yielding a total of 165,311 test day observations after editing. The average herd had 21.39 lactating cows, mostly Holsteins, under grazing with concentrate supplementation. The variability on somatic cells scores (SCS) was explained by a linear model containing the following effects: calving year (1997 to 2003), calving month, milk recording year (1998 to 2003), milk recording month, age at calving, cooperative (1 to 4), stage of lactation, years in milk recording (1, 2,..., 5 or greater), herd nested with cooperative and the interaction between herd (cooperative) and calving year. The average SCS was 3.57 and the standard deviation was 1.95. All effects were statistically significant, but years in milk recording. SCS increased progressively towards the end of lactation and as the cows got older. SCS were higher in April and May, and lower from August to December. Cows calving in January had the highest SCS average, while those calving in April had the lowest SCS, which seems to be related to better climatic and nutritional conditions.

Citation Info

Save
Cite
Email this content

Share link with colleague or librarian

You can email a link to this page to a colleague or librarian:
Email this content
or copy the link directly:

https://brill.edhh.ma/abstract/book/9789086865505/BP000109.xml
The link was not copied. Your current browser may not support copying via this button.

Link copied successfully

Collapse
Expand

Mastitis in dairy production

Current knowledge and future solutions

E-Book ISBN:: 9789086865505

Publisher:: Wageningen Academic

Print Publication Date:: 24 Oct 2005

Subjects
- Life Sciences

Metrics

	All Time	Past 365 days	Past 30 Days
Abstract Views	74	29	4
Full Text Views	2	0	0
PDF Views & Downloads	3	0	0

African Studies	Education	Media Studies
American Studies	History	Middle East and Islamic Studies
Ancient Near East and Egypt	Human Rights and Humanitarian Law	Musicology
Art History	International Law	Philosophy
Asian Studies	International Relations	Religious Studies
Biblical Studies	Jewish Studies	Slavic and Eurasian Studies
Biology	Languages and Linguistics	Social Sciences
Book History and Cartography	Life Sciences	Theology and World Christianity
Classical Studies	Literature and Cultural Studies

Subjects

Authors

Open Access

Product Information

Company

Contact

Environmental factors affecting somatic cells counts in milk from small dairies in Southern Brazil

Citation Info

Share link with colleague or librarian

Mastitis in dairy production

Current knowledge and future solutions

Table of Contents

Metrics

Metrics