Influence of pathogens causing clinical mastitis in dairy cows reproductive indices

• Grant number: 15/26055-1
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: January 01, 2017
• End date: August 31, 2019
• Field of knowledge: Agronomical Sciences - Veterinary Medicine - Preventive Veterinary Medicine
• Principal Investigator: Helio Langoni
• Grantee: Felipe Morales Dalanezi
• Host Institution: Faculdade de Medicina Veterinária e Zootecnia (FMVZ). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil
• Associated scholarship(s): 17/21066-0 - Influence of pathogens causing clinical mastitis on local inflammatory markers and reproductive efficiency of dairy cows, BE.EP.DR

Abstract

Mastitis is a disease of the mammary gland, result of infection of the udder by pathogenic agents such as bacteria, viruses, fungi and algae. Bacteria are the main cause of mastitis. Regarding the causative pathogen of mastitis can be classified into contagious and environmental. They presenting different characteristics and forms of combat. The disease is responsible for great economic losses in the dairy production. For the dairy producer can profit with this activity, it is necessary that losses are minimized. Reproduction of milk cows is another important factor in a commercial property, and the decline in reproductive indices accentuate the producer's losses. When combined the two factors, reproduction and mastitis, the economic loss to treatment of sick animals and hormones and semen doses increase exponentially. Some experiments were carried out in order to try to prove and understand how the disease acts on the fall of bovine reproduction. Animals with clinical mastitis or subclinical have lower conception rate, increased interval between calving and first insemination, higher miscarriage rate, and decrease the release and the blood concentration of reproductive hormones. The pathogen responsible for infection of the mammary gland is also a factor that leads to reproductive declines. Gram negative bacteria such as E. coli lead to a drop of 32% in reproductive parameters.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DALANEZI, FELIPE M.; SCHMIDT, ELIZABETH M. S.; JOAQUIM, SAMEA F.; GUIMARAES, FELIPE F.; GUERRA, SIMONI T.; LOPES, BRUNA C.; CERRI, RONALDO L. A.; CHADWICK, CHRISTOPHER; LANGONI, HELIO. Concentrations of Acute-Phase Proteins in Milk from Cows with Clinical Mastitis Caused by Different Pathogens. PATHOGENS, v. 9, n. 9, SEP 2020. (15/26055-1, 15/19688-8)

DALANEZI, F. M.; JOAQUIM, S. F.; GUIMARAES, F. F.; GUERRA, S. T.; LOPES, B. C.; SCHMIDT, E. M. S.; CERRI, R. L. A.; LANGONI, H.. Influence of pathogens causing clinical mastitis on reproductive variables of dairy cows. JOURNAL OF DAIRY SCIENCE, v. 103, n. 4, p. 3648-3655, APR 2020. (15/26055-1, 15/19688-8)

DALANEZI, FELIPE MORALES; DA PAZ, GISELLE SOUZA; JOAQUIM, SAMEA FERNANDES; GUIMARAES, FELIPE FREITAS; GIMENES BOSCO, SANDRA DE MORAES; LANGONI, HELIO. &ITShort communication&IT:The first report of &ITCyberlindnera rhodanensis&IT associated with clinical bovine mastitis. JOURNAL OF DAIRY SCIENCE, v. 101, n. 1, p. 581-583, JAN 2018. (15/26055-1)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

DALANEZI, Felipe Morales. Influence of clinical mastitis caused by different pathogens on reproductive indices of dairy cows and on acute phase proteins response.. 2019. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Faculdade de Medicina Veterinária e Zootecnia. Botucatu Botucatu.