Abstract #359

# 359
Early lactation disease incidence in Holstein cows across multiple US regions.
Pablo Pinedo*1,6, Jose Santos2, Gustavo Schuenemann3, Rodrigo Bicalho4, Ricardo Chebel2, Klibs Galvao2, Robert Gilbert4, Sandra Rodrigez-Zas5, Guilherme Rosa6, Christopher Seabury7, John Fetrow8, William Thatcher2, 1Texas A&M AgriLife Research, Amarillo TX, 2University of Florida, Gainesville, FL, 3The Ohio State University, Columbus, OH, 4Cornell University, Ithaca, NY, 5University of Illinois, Urbana-Champaign, IL, 6University of Wisconsin, Madison, WI, 7Texas A&M University, College Station, TX, 8University of Minnesota, Saint Paul, MN.

The objective was to assess the incidence of transition cow diseases in Holstein cows (n = 10,959 in 16 herds) calving during the warm (WS: May–Aug) and cool (CS: Oct – Jan) seasons. Cows were enrolled at parturition and monitored weekly for multiple diseases until 60 DIM. Disease included retained fetal membranes (RFM), metritis (MET, 7 ± 3 DIM; foul-smell, watery, brownish vaginal discharge), subclinical ketosis (SKT, 7 ± 3 DIM; serum BHBA >1.0 mmol/L), mastitis (MAS; farm records), left displaced abomasum (LDA), pneumonia (PN; farm records), clinical endometritis (CE 28 ± 3 DIM; from mucopurulent to fetid vaginal discharge) and lameness (LAM 35 ± 3 DIM; score > 3). Study locations included the Northeast (NE; 4 herds), Midwest (MW; 6 herds), Southeast (SE; 1 herd), and the Southwest (SW; 5 herds) regions. Disease incidence was estimated by region and season (top part of Table 1). Associations between disease occurrence and region, calving season, and parity (1, ≥ 2) were tested by logistic regression. The effect of region on disease occurrence was only significant for LAM (P < 0.05). Contrarily, season of calving and parity were significantly associated with the risk of transition diseases in all the disorders analyzed (bottom part of Table 1). This project was funded by USDA-NIFA-AFRI (2013–68004–20361). Table 1. Incidence (%) of transition cow diseases by region and season of calving (top) and odds ratios for the risk of disease by region, season of calving, and parity (bottom); references are SW, WS, and parity ≥2
ItemNEMWSESW
WSCSWSCSWSCSWSCS
RFM8.05.97.45.415.07.64.32.9
MET21.723.819.520.219.718.527.624.8
SKT41.818.725.915.524.920.131.314.6
MAS26.116.06.15.518.021.312.08.1
LDA3.05.62.91.46.04.01.01.0
PNM1.11.51.71.83.813.47.13.5
CLE15.432.525.920.423.442.924.326.1
LAM11.32.62.18.11.712.15.42.0
RFMMETSKTMASCLELAM
OR95%CIOR95%CIOR95%CIOR95%CIOR95%CIOR95%CI
Region
 MW1.90.7-5.00.80.5-1.40.70.2-2.10.60.2-2.01.00.6-1.73.71.3-10.5
 NE2.40.8-7.11.00.6-1.81.20.4-4.32.40.8-6.91.10.6-2.00.90.3-2.5
 SE4.20.8-23.00.80.3-2.01.00.1-7.62.90.5-16.31.70.7-4.51.40.3-6.3
Season
 CS0.60.5-0.71.11.0-1.20.40.3-0.40.70.7-0.91.41.2-1.52.51.8-3.4
Parity
 10.40.4-0.51.81.6-2.00.60.5-0.71.31.1-1.51.11.0-1.20.20.1-0.3

Key Words: health, transition, Holstein