Full Text Journal Articles by
Author Tiago Tomazi

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Association between antimicrobial use and antimicrobial resistance of Streptococcus uberis causing clinical mastitis.

Larissa Martins, Juliano L Gonçalves, Renata F Leite, Tiago Tomazi, Vera L M Rall, Marcos V Santos,

It is unknown whether overuse of antimicrobials against clinical mastitis (CM) from Streptococcus uberis is associated with increased antimicrobial resistance (AMR). Therefore, the aim of this study was to evaluate the association between antimicrobial use (AMU) and AMR in relation to the Strep. uberis causing CM in dairy herds. A ... Read more >>

J Dairy Sci (Journal of dairy science)
[2021, :]

Cited: 0 times

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Description of the Characteristics of Five Bedding Materials and Association With Bulk Tank Milk Quality on Five New York Dairy Herds.

Valeria M Alanis, Michael Zurakowski, Deb Pawloski, Tiago Tomazi, Daryl V Nydam, Paula A Ospina,

Environmental mastitis represents a major challenge on dairy farms where contagious pathogens are controlled by improved milking procedures. Therefore, research focused on the environment is important to improve udder health programs. The objectives of this prospective and descriptive study were to (1) describe bedding bacterial counts, pH, and dry matter ... Read more >>

Front Vet Sci (Frontiers in veterinary science)
[2021, 8:636833]

Cited: 0 times

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Effect of metaphylactic administration of tildipirosin on the incidence of pneumonia and otitis and on the upper respiratory tract and fecal microbiome of preweaning Holstein calves.

Leonardo Bringhenti, Mariana Pallu, Josiane Silva, Tiago Tomazi, Ana C Tomazi, Marjory X Rodrigues, Livia M Duarte, Todd R Bilby, Rodrigo C Bicalho,

The objectives of this study were to evaluate the effect of the metaphylactic use of a semi-synthetic long-acting macrolide (tildipirosin) on the prevention of pneumonia and otitis in preweaning Holstein calves, as well as its effects on the microbiome of their upper respiratory tract (URT) and feces. Newborn healthy Holstein ... Read more >>

J Dairy Sci (Journal of dairy science)
[2021, 104(5):6020-6038]

Cited: 0 times

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Internal Teat Sealant Administered at Drying off Reduces Intramammary Infections during the Dry and Early Lactation Periods of Dairy Cows.

Gustavo Freu, Tiago Tomazi, Camylla Pedrosa Monteiro, Melina Melo Barcelos, Bruna Gomes Alves, Marcos Veiga Dos Santos,

The effect of an internal teat sealant (ITS) on subsequent infection of the mammary gland was evaluated on the following mammary gland health indicators: (a) bacteriological cure of preexisting intramammary infections at drying off, (b) risk of postpartum new intramammary infections (NIMI), (c) cure and risk of new cases of ... Read more >>

Animals (Basel) (Animals : an open access journal from MDPI)
[2020, 10(9):]

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Antimicrobial use for treatment of clinical mastitis in dairy herds from Brazil and its association with herd-level descriptors.

Tiago Tomazi, Marcos Veiga Dos Santos,

The aims of this prospective and descriptive study were to: (a) characterize treatment profile and quantify antimicrobial consumption for treatment of clinical mastitis (CM) in dairy herds of Brazil; and, (b) determine the association of antimicrobial use (AMU) for treatment of CM and herd-level descriptors, such as herd size, average ... Read more >>

Prev Vet Med (Preventive veterinary medicine)
[2020, 176:104937]

Cited: 0 times

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Genotyping and antimicrobial resistance of Streptococcus uberis isolated from bovine clinical mastitis.

Tiago Tomazi, Gustavo Freu, Bruna Gomes Alves, Antonio Francisco de Souza Filho, Marcos Bryan Heinemann, Marcos Veiga Dos Santos,

A genotypic characterization of Streptococcus uberis isolated from clinical mastitis (CM) in dairy cows, and the association of Strep. uberis genotypes and antimicrobial susceptibility (AMS) was performed. A total of 89 isolates identified as Strep. uberis from 86 dairy cows with CM in 17 dairy herds of Southeastern Brazil were ... Read more >>

PLoS One (PloS one)
[2019, 14(10):e0223719]

Cited: 5 times

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Association of herd-level risk factors and incidence rate of clinical mastitis in 20 Brazilian dairy herds.

Tiago Tomazi, Gabriel C Ferreira, Alessandra M Orsi, Juliano L Gonçalves, Paula A Ospina, Daryl V Nydam, Paolo Moroni, Marcos V Dos Santos,

The objectives of this study were to characterize the pathogen frequency and severity of clinical mastitis (CM) in 20 dairy herds of southeastern Brazil; and to determine the incidence rate of clinical mastitis (IRCM; overall and based on specific-pathogen groups) based on quarter time at risk and its association with ... Read more >>

Prev Vet Med (Preventive veterinary medicine)
[2018, 161:9-18]

Cited: 3 times

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Molecular characterization and antimicrobial susceptibility pattern of Streptococcus agalactiae isolated from clinical mastitis in dairy cattle.

Tiago Tomazi, Antonio Francisco de Souza Filho, Marcos Bryan Heinemann, Marcos Veiga Dos Santos,

The objectives of this study were to: (a) genotypically characterize Streptococcus agalactiae isolates recovered from clinical mastitis (CM) cases in dairy cows and, (b) determine the association of antimicrobial susceptibility (AMS) and genotypes of Strep. agalactiae clustered according to the genetic similarity. A total of 89 Strep. agalactiae isolates recovered ... Read more >>

PLoS One (PloS one)
[2018, 13(6):e0199561]

Cited: 8 times

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Randomized clinical trial comparing ceftiofur hydrochloride with a positive control protocol for intramammary treatment of nonsevere clinical mastitis in dairy cows.

Cristina Simões Cortinhas, Tiago Tomazi, Mário Sérgio Ferreira Zoni, Elio Moro, Marcos Veiga Dos Santos,

The objective of this study was to compare ceftiofur hydrochloride with a positive control protocol for intramammary treatment of nonsevere clinical mastitis in dairy cows. A total of 264 clinical mastitis cases on 11 commercial dairy farms were treated with intramammary infusions, once a day for 4 d using 1 ... Read more >>

J Dairy Sci (Journal of dairy science)
[2016, 99(7):5619-5628]

Cited: 6 times

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Effects of bovine subclinical mastitis caused by Corynebacterium spp. on somatic cell count, milk yield and composition by comparing contralateral quarters.

Juliano Leonel Gonçalves, Tiago Tomazi, Juliana Regina Barreiro, Daniele Cristine Beuron, Marcos André Arcari, Sarah Hwa In Lee, Cristian Marlon de Magalhães Rodrigues Martins, João Pessoa Araújo Junior, Marcos Veiga dos Santos,

Subclinical mastitis caused by Corynebacterium spp. (as a group and at the species level) was investigated by evaluating contralateral (healthy and infected) mammary quarters for somatic cell count (SCC), milk yield and composition. Selection of cows with subclinical mastitis caused by Corynebacterium spp. was performed by microbiological culture of composite ... Read more >>

Vet J (Veterinary journal (London, England : 1997))
[2016, 209:87-92]

Cited: 18 times

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Identification of Corynebacterium spp. isolated from bovine intramammary infections by matrix-assisted laser desorption ionization-time of flight mass spectrometry.

Juliano Leonel Gonçalves, Juliano Leonel Gonçalves, Tiago Tomazi, Juliana Regina Barreiro, Patrícia Aparecida de Campos Braga, Christina Ramires Ferreira, João Pessoa Araújo Junior, Marcos Nogueira Eberlin, Marcos Veiga dos Santos,

Corynebacterium species (spp.) are among the most frequently isolated pathogens associated with subclinical mastitis in dairy cows. However, simple, fast, and reliable methods for the identification of species of the genus Corynebacterium are not currently available. This study aimed to evaluate the usefulness of matrix-assisted laser desorption ionization/mass spectrometry (MALDI-TOF ... Read more >>

Vet Microbiol (Veterinary microbiology)
[2014, 173(1-2):147-151]

Cited: 14 times

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Identification of coagulase-negative staphylococci from bovine intramammary infection by matrix-assisted laser desorption ionization-time of flight mass spectrometry.

Tiago Tomazi, Juliano Leonel Gonçalves, Juliana Regina Barreiro, Patrícia Aparecida de Campos Braga, Luis Felipe Prada e Silva, Marcos Nogueira Eberlin, Marcos Veiga dos Santos,

Coagulase-negative staphylococci (CoNS) are among the main pathogens causing bovine intramammary infection (IMI) in many countries. However, one of the limitations related to the specific diagnosis of CoNS is the lack of an accurate, rapid, and convenient method that can differentiate the bacterial species comprising this group. The aim of ... Read more >>

J Clin Microbiol (Journal of clinical microbiology)
[2014, 52(5):1658-1663]

Cited: 22 times

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