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Herd level risk factors for bovine viral diarrhoea infection in cattle

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Eduardo J Kwiecien
Eduardo J Kwiecien

This document summarizes a study on risk factors for bovine viral diarrhea (BVD) infection in cattle in Tamil Nadu, India. The objectives were to assess the current BVD status, identify associated risk factors, and develop a computer-based forecasting system. Blood samples were collected from 500 cattle across 62 farms and tested for BVD antibodies. The results found a 13.2% animal-level and 27.14% farm-level seropositivity. Identified risk factors for higher BVD infection included greater distance between farms, older animal age, larger farm size, and frequent animal purchases. A computer-based forecasting model was developed to analyze risk factors, assess infection probability, and avoid future risks.

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HERD-LEVEL RISK FACTORS FOR BOVINE VIRAL DIARRHOEA INFECTION IN CATTLE OF TAMIL NADU Dr.S.Krishna Kumar, Ph.D., Department of Veterinary Medicine, Veterinary College and Research Institute, Orathanadu -614625
OBJECTIVES ? To assess the present status of bovine viral diarrhoea (BVD) in cattle of Tamil Nadu ? To assess the risk factors associated with Bovine viral diarrhoea ? Developing computer based forecasting system 2
Selection of study population 3
Distribution of herd size Herd size Coimbatore Erode Karur Tirupur Total Small (<25) 03 18 08 07 36 Medium (25-50) 07 01 03 04 15 Large (>50) 04 00 03 04 11 Total 14 19 14 15 62 4
Sampling for IELISA District No. of samples No . of farms Coimbatore 125 14 Erode 125 19 Karur 125 14 Tirupur 125 15 Total 500 62 5
IDEXX BVDV Total Ab Test kit 6
BVD Ab Titer 7 -0.5 0 0.5 1 1.5 2 2.5 Antibody titer Number of samples
Concurrent infection of IBR, Brucellosis and Tuberculosis Variable IBR Brucellosis Tuberculosis Total Positive Negative Positive Negative Positive Negative BVD Positive 03 63 01 65 06 60 66 BVD Negative 06 428 01 433 01 433 434 Total 09 491 02 498 07 493 500 % within BVD sero positive 4.5 95.5 1.5 98.5 9.1 90.9 13.20 P value 3.242a 2.373a 32.582a Chi square value 0.072 0.123 0.000 8
Results 9 13.20% Animal level BVD seropositivity Farm level BVD seropositivity Seropositivity by IELISA Seropositivity by VNT 27.14% 13.20 % 28. 60 %
Risk factors in BVD infection HIGHER DISTANCE BETWEEN FARMS HIGHER AGE HF X LESSER DISTANCE BETWEEN FARM AND MANURE PIT URBAN HIGHER FARM SIZE MASTITIS FREQUENT PURCHASE LOCAL FARMER MID GESTATION
Computer based forecasting model ? Collection and analysis of sample ? Correlation of risk factors to BVD infection ? Analysis of algorithm ? Ranking model for risk factors ? Probability assessment at farm level ? Avoiding of risk factors ? Calculation of economic loss INT CONF NKL 11
bvd.topbeantechologies.com 21 JULY 2017 INT CONF NKL 12
Conclusion 13 13.20% Animal level BVD seropositivity Farm level BVD seropositivity Seropositivity by VNT 27.14% 28. 60 % Risk factors Computer based fore castiong module
? Any suggestions ? Any comments ? Any questions ? Thank you to all my co workers

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Herd level risk factors for bovine viral diarrhoea infection in cattle

  • 1. HERD-LEVEL RISK FACTORS FOR BOVINE VIRAL DIARRHOEA INFECTION IN CATTLE OF TAMIL NADU Dr.S.Krishna Kumar, Ph.D., Department of Veterinary Medicine, Veterinary College and Research Institute, Orathanadu -614625
  • 2. OBJECTIVES ? To assess the present status of bovine viral diarrhoea (BVD) in cattle of Tamil Nadu ? To assess the risk factors associated with Bovine viral diarrhoea ? Developing computer based forecasting system 2
  • 3. Selection of study population 3
  • 4. Distribution of herd size Herd size Coimbatore Erode Karur Tirupur Total Small (<25) 03 18 08 07 36 Medium (25-50) 07 01 03 04 15 Large (>50) 04 00 03 04 11 Total 14 19 14 15 62 4
  • 5. Sampling for IELISA District No. of samples No . of farms Coimbatore 125 14 Erode 125 19 Karur 125 14 Tirupur 125 15 Total 500 62 5
  • 6. IDEXX BVDV Total Ab Test kit 6
  • 8. Concurrent infection of IBR, Brucellosis and Tuberculosis Variable IBR Brucellosis Tuberculosis Total Positive Negative Positive Negative Positive Negative BVD Positive 03 63 01 65 06 60 66 BVD Negative 06 428 01 433 01 433 434 Total 09 491 02 498 07 493 500 % within BVD sero positive 4.5 95.5 1.5 98.5 9.1 90.9 13.20 P value 3.242a 2.373a 32.582a Chi square value 0.072 0.123 0.000 8
  • 9. Results 9 13.20% Animal level BVD seropositivity Farm level BVD seropositivity Seropositivity by IELISA Seropositivity by VNT 27.14% 13.20 % 28. 60 %
  • 10. Risk factors in BVD infection HIGHER DISTANCE BETWEEN FARMS HIGHER AGE HF X LESSER DISTANCE BETWEEN FARM AND MANURE PIT URBAN HIGHER FARM SIZE MASTITIS FREQUENT PURCHASE LOCAL FARMER MID GESTATION
  • 11. Computer based forecasting model ? Collection and analysis of sample ? Correlation of risk factors to BVD infection ? Analysis of algorithm ? Ranking model for risk factors ? Probability assessment at farm level ? Avoiding of risk factors ? Calculation of economic loss INT CONF NKL 11
  • 13. Conclusion 13 13.20% Animal level BVD seropositivity Farm level BVD seropositivity Seropositivity by VNT 27.14% 28. 60 % Risk factors Computer based fore castiong module
  • 14. ? Any suggestions ? Any comments ? Any questions ? Thank you to all my co workers