Shortcuts

Locate a laboratory in North America

Laboratory Distributor

Locate a laboratory by state or province, or locate a distributor.

A-D F-K L-R S-W

Alabama

RH Tompkins
33 Boshnell Rd
Russellville, AL 35653

256-810-3465
  • BVD

Thompson-Bishop Sparks State
Diagnostic Lab
890 Simms Rd
Auburn, AL 36832

334-844-4987

  • BVD

  • Johne's (MAP)

  • Neospora
Arizona

Arizona DHIA
811 W Broadway Rd
Tempe, AZ 85281

480-894-0156

azdhia.com
  • Johne's (MAP)
Arkansas

Arkansas Livestock & Poultry
1 Natural Resources Dr

Little Rock, AR 72205

501-823-1730
agriculture.arkansas.gov
  • Johne's (MAP)
  • Pregnancy serum/blood
  • Neospora

Delta Livestock Diagnostics
221 North Gee Street
Office C
Jonesboro, AR 72401

deltalivestockdiagnostics.com
  • Johne's (MAP)
  • Pregnancy serum/blood
  • Alertys OnFarm
  • BVD

Zotec Livestock Diagnostics

Timbo, Arkansas 72680

Little Rock, AR 72205

870-213-8968
zoteclivestockdiagnostics.com
  • Pregnancy serum/blood
California

CAHFS - California Animal Health & Food Safety Lab
620 W Health Sciences Dr
Davis, CA 95616

530-752-8517
cahfs.vetmed.ucdavis.edu

 
  • BVD
  • Johne's (MAP)
  • Pregnancy serum/blood
  • Neospora

RePRO Results – Alta California
12351 Bradbury Rd
Ballico, CA 95324

209-632-5836
  • Pregnancy serum/blood

Sequoia Veterinary Services
880 E Merritt Ave
Tulare, CA 93274

559-366-7125
  • Pregnancy serum/blood

Universal Biomedical Research Laboratory (UBRL)
1300 N Fresno St
Fresno, CA 93703

559-498-0820
ubrl.universalbiopharma.org

 
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
Colorado

Rocky Ford Veterinary Diagnostic Laboratory (Colorado State)
27847 County Rd 21
Rocky Ford, CO 81067

719-254-6382

csu-cvmbs.colostate.edu
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood
  • Neospora

Colorado State University Veterinary Diagnostic Laboratory
2450 Gillette Dr, Room 123
Fort Collins, CO 80523

970-297-1281

dlab.colostate.edu
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood

Rocky Mountain Regional Animal Health Laboratory
2331 W 31st Ave
Denver, CO 80211

303-477-0049
  • BVD
  • Johne's (MAP)

The Dairy Authority
8215 W 20th St Unit A
Greeley, CO 80634

970-351-8102
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood
  • Neospora
Florida

Bronson Animal Disease Diagnostic Laboratory
2700 N John Young Pkwy
Kissimmee, FL 34741-1266

321-697-1400

freshfromflorida.com
  • BVD

Central Florida Large Animal Veterinary Services
2331 Eastern Ave
Saint Cloud, FL 34769

407-892-2034

centralfloridalargeanimal.com
  • BVD
  • Johne's (MAP)
Georgia

Southeastern Animal Labs
1105 N Tennessee St
Rydal, GA 30171

770-606-4053

seanimallabs.com
  • Pregnancy serum/blood

University of Georgia
43 Brighton Rd
Tifton, GA 31793

229-386-3340

​​​​​vet.uga.edu
  • BVD
  • Johne's (MAP)
Idaho

GHC Labs
4131 N 2200 E
Filer, ID 83328

208-308-8612

ghosthollow.com
  • BVD

Idaho State Dept. of Agriculture
2230 Old Penitentiary Rd
Boise, ID 83712-8249

208-332-8570

agri.idaho.gov
  • BVD
  • Johne's (MAP)

Northwest Labs, LLC
150 Bridon Way
Jerome, ID 83338

208-324-7511

agsource.com
  • BVD
  • Johne's (MAP)
  • Pregnancy serum/blood
Indiana

Animal Hospital of Bedford
138 16th St
Bedford, IN 47421-3411

812-275-4979
​​​​​​​vethospitalofbedford.com
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood

Purdue University (Livestock)
406 S University St
West Lafayette, IN 47907-2065

765-494-7451
  • BVD
  • Johne's (MAP)
  • Neospora
Iowa

Dairy Lab Services
5105 Wolff Rd
Dubuque, IA 52002-2564

563-557-7422

dairylab.com
  • Johne's (MAP)
  • Pregnancy milk

Iowa State University
1850 Christensen Dr
Ames, IA 50011

515-294-1950

vetmed.iastate.edu
  • BVD
  • Johne's (MAP)
Kansas

Central States Testing LLC
1795 PP Rd
Sublette, KS 67877

620-675-8180

cstbvd.com
  • Pregnancy serum/blood

Dodge City Vet Clinic
1920 E Trail St

Dodge City, KS 67801-9017

620-227-8651
 
  • BVD
  • Pregnancy milk
  • Pregnancy serum/blood

Genetic Horizons/SEK Genetics
9525 70th Rd

Galesburg, KS 66740

800-443-6389

sekgenetics.com
  • BVD
  • Johne's (MAP)
  • Neospora

Heart Of America DHIA

628 Pottawatomie Ave

Manhattan, KS 66502

800-698-2634

hoadhia.com
  • Johne's (MAP)
  • Pregnancy milk

Kansas State University

1800 Denison Ave

Manhattan, KS 66506

866-512-5650

ksvdl.org
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood
  • Neospora

Midwest Diagnostics, LLC

602 Exchange St

Emporia, KS 66801

620-343-7682
  • BVD
  • Pregnancy serum/blood

Progressive Beef Consulting Service

622 Mckinley St

Great Bend, KS 67530

620-792-1265

myamcvets.com
  • BVD
  • Pregnancy serum/blood

Stevens Veterinary Services

1202 Steele Ave

Scott City, KS 67871

620-872-2727
  • BVD
Kentucky

Central States Testing LLC
950 N Mulberry St Ste 220a
Elizabethtown, KY 42701

270-982-5600

​​​​​​​cstbvd.com
  • Pregnancy serum/blood

Dependable Livestock Testing
156 Vincent St
Smiths Grove, KY 42171

270-780-8378
  • BVD
  • Johne's (MAP)

Mcclain Farms
824 Mullins Ln
Benton, KY 42025

270-703-5660
  • BVD

Murray State University – Breathitt Vet Center

101 MSU Dr

Hopkinsville, KY 42240

270-886-3959

breathitt.murraystate.edu
  • Johne's (MAP)

University Of Kentucky Veterinary Diagnostic Laboratory

1490 Bull Lea Rd

Lexington, KY 40511

859-257-8283

vdl.uky.edu
  • BVD
  • Johne's (MAP)
  • ​​​​​​​Pregnancy serum/blood
Manitoba

Manitoba Agriculture and Food
545 University Crescent

Winnipeg, R3T 5S6
Canada

204-945-7630

gov.mb.ca
  • BVD
  • Neospora
Michigan

Northern Ag Diagnostics

6772 Scott Rd

Hubbard Lake, MI 49747

989-464-5737

solofarms.net
  • Pregnancy milk
  • Pregnancy serum/blood
  • Neospora

CentralStar Michigan Lab

1163 Comet Ln
Grand Ledge, MI 48837

1-800-631-3510

mycentralstar.com
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood
  • Neospora
Minnesota

Eurofins DQCI

5205 Quincy St

Mounds View, MN 55112-1400

763-785-0484

dqci.com
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood

Minnesota Veterinary Associates

222 County Road 173 SE

Melrose, MN 56352-1602

320-256-4252

vetmnmelrose.com
  • Johne's (MAP)

MN DHIA

671 W 1st St

Zumbrota, MN 55992

507-732-5880

mndhia.org
  • Johne's (MAP)
  • Pregnancy milk

Stearns DHIA Central Lab

825 12th Street South

Sauk Centre, MN 56378

320-352-2028

stearnsdhialab.com
  •  Johne's (MAP)
  • Pregnancy milk

University Of Minnesota, Vdl

1333 Gortner Ave Rm 157

Saint Paul, MN 55108-1098

612-625-6729

vdl.umn.edu
  • BVD
  • Johne's (MAP)
  • Neospora
Mississippi

Mississippi Veterinary Research and Diagnostic Laboratory

3137 Hwy 468 W

Pearl, MS 39208

601-420-4700

cvm.msstate.edu
  • BVD
  • Johne's (MAP)

Prairie Livestock

2845 Barton Ferry Rd

West Point, MS 39773

662-494-5651
  • BVD
Missouri

Henderson Feed and Vet LLC

23480 Hwy 7

Warsaw, MO 65355

660-438-7105
  • BVD
  • Pregnancy serum/blood

Mid-South Dairy Records

1960 E Blaine Street

Springfield, MO 65803

417-831-6931

mydhia.org
  • Pregnancy milk

Missouri Department of Agriculture

101 N Chestnut St

Jefferson City, MO 65101

573-751-3460

agriculture.mo.gov

  

Missouri Department of Agriculture

701 N Miller

Springfield, MO 65802

417-895-6861

agriculture.mo.gov
  • BVD
  • Johne's (MAP)

MQT Lab Services

8600 NW 107th Terrace

Kansas City, MO 64153

816-801-6304

mqtlabs.com
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood
Montana

Montana Dept of Livestock

1911 W Lincoln St

Bozeman, MT 59718

406-994-4885

liv.mt.gov
  • BVD
  • Johne's (MAP)
Nebraska

Nebraska Vet Diagnostic Center 

129 Veterinary Diagnostic Lab

Lincoln, NE 68583

402-472-8465

vbms.unl.edu
  • BVD
  • Johne's (MAP)
  • Pregnancy serum/blood
  • Neospora

Geneseek Inc.

4131 N 48th St

Lincoln, NE 68504

402-435-0665
  • Johne's (MAP)
New Mexico

GHC Labs
314 Wheeler

Texico, NM 88135

208-308-8612

ghosthollow.com
  • BVD
  • Pregnancy milk

NMDA-Veterinary Diagnostic Services

1101 Camino De Salud NE

Albuquerque, NM 87102-4519

505-383-9299

nmda.nmsu.edu
  • BVD
  • Pregnancy serum/blood

Progressive Dairy Health Services

5316 Mabry Dr

Clovis, NM 88101

575-742-3336
  • Johne's (MAP)

Yucca Veterinary Medical Center

1006 S Main St

Belen, NM 87002

505-864-6001

yuccavet.com
  • Pregnancy serum/blood
New York

Cornell NY State Animal Health

240 Farrier Rd

Ithaca, NY 14853-8002

607-253-3919

ahdc.vet.cornell.edu
  • BVD

Dairy One

730 Warren Rd

Ithaca, NY 14850

607-257-1272

dairyone.com
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
North Carolina

Rocky Creek Veterinary Service

178 Holstein Ln

Olin, NC 28660

704-546-2210

rockycreekveterinary.com
  • BVD

Rollins Animal Disease Diagnostic Laboratory
2101 Blue Ridge Rd

Raleigh, NC 27607

919-733-3986

ncagr.gov
  • BVD
  • Johne's (MAP)
  • Neospora
Ohio

Animal Disease Diagnostic Laboratory

8995 E Main St

Reynoldsburg, OH 43068-3342

614-728-6220

agri.ohio.gov
  • BVD
  • Neospora

DHI Cooperative, Inc

1224 Alton Darby Creek Rd Ste A

Columbus, OH 43228

614-545-0460

dhicoop.com
  • Johne's (MAP)
  • Pregnancy milk

Eastern Lab Services

1035 Medina Rd Ste 500

Medina, OH 44256

330-670-7920

elslab.com
  • BVD, Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood
Oklahoma

Cattle Stats

9421 N Robinson

Oklahoma City, OK 73114

405-607-4522

cattlestats.com
  • BVD
  • Pregnancy serum/blood

Oklahoma State University

1950 W Farm Road

Stillwater, OK 74078-0001

405-744-6623

cvhs.okstate.edu
  • BVD
  • Johne's (MAP)
  • Pregnancy serum/blood

Verden Veterinary Clinic

2183 County St 2760

Verden, OK 73092

405-453-7321

okiedokiecattledata.com
  • Pregnancy serum/blood
Ontario

Can West DHI

381 Elmira Rd N, Unit 2

Guelph, ON N1K 1H3

Canada

519-824-2320 ext. 408

canwestdhi.com
  • BVD
  • Johne's (MAP)
  • Pregnancy milk

University Of Guelph - Animal Health Laboratory

419 Gordon St

Guelph, ON N1G 2W1
Canada

519-824-4120

guelphlabservices.com
  • BVD
  • Johne's (MAP)
  • Neospora
Oregon

Animal Profiling International

6040 N Cutter Cir # 317

Portland, OR 97217

503-247-8066

animalprofiling.com
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood
  • Neospora

Oregon State University

105 Magruder Hall

Corvallis, OR 97331-8555

541-737-2141

vetmed.oregonstate.edu
  • BVD
Pennsylvania

Centre Herd Health Services 

2780 Earlytown Rd

Centre Hall, PA 16828

814-364-9655

centreherdhealthservicesinc.blogspot.com
  • Pregnancy serum/blood

Lancaster DHIA

1592 Old Line Rd

Manheim, PA 17545

717-665-5960

lancasterdhia.com
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood

Pennsylvania Veterinary Laboratory

2305 N Cameron St

Harrisburg, PA 17110

717-787-8808
  • BVD
  • Johne's (MAP)
  • Pregnancy serum/blood
  • Neospora

Precision Diagnostics LLC

245 White Oak Rd

New Holland, PA 17557

717-354-2178

precisiond.com
  • Johne's (MAP)
Quebec

Valacta

555 Blvd des Anciens Combattants

Sainte-Anne-de-Bellevue, Quebec H9X 3R4
Canada

514-459-3030

valacta.com
  • Johne's (MAP)
  • Pregnancy milk
South Carolina

Clemson University

500 Clemson Rd

Columbia, SC 29229-4306

803-788-2260

clemson.edu
  • BVD
  • Johne's (MAP)
South Dakota

SDSU – Animal Disease Research And Diagnostic Laboratory

N Campus Drive

Brookings, SD 57007-0001

605-688-5171

sdstate.edu
  • BVD, Johne's (MAP)
  • Pregnancy serum/blood
Tennessee

Performance Animal Diagnostics

4050 West Main St Ste 2

Erin, TN 37061

931-709-5004
  • BVD
  • Johne's (MAP)
  • Pregnancy serum/blood

Tenn Dept Agriculture/Ivy Lab

436 Hogan Rd/Porter Bldg

Nashville, TN 37220

615-837-5343
  • BVD
  • Johne's (MAP)

University of Tennessee at Knoxville

2407 River Dr Rm A-239 Clinical

Knoxville, TN 37996-4500 

865-974-5643
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood
Texas

Circle H Headquarters, LLC

3216 US Hwy 54 E

Dalhart, TX 79022

806-244-7851

circleh.info
  • Johne's (MAP)

Clarendon Vet Hospital

5950 Fairbanks N. Houston Rd
Clarendon, TX 79226

806-874-3545
  • Pregnancy serum/blood

Integrated Dairy Services

975 N Patrick St

Dublin, TX 76446

254-445-3985
  • BVD

Mabank Animal Hospital

719 E Mason

Mabank, TX 75147

903-887-9991
  • Johne's (MAP)
  • Pregnancy serum/blood

Muleshoe Vet Clinic

1430 US Highway 84

Muleshoe, TX 79347-6194

806-272-3061
  • Johne's (MAP)
  • Pregnancy serum/blood

North Texas Livestock Diagnostics

2051 County Rd 4665

Leonard, TX 75452

979-849-9307

ntxlivestockdiagnostics.com
  • BVD
  • Pregnancy serum/blood
  • CAEV

Stolt Cattle Company

6700 Sandy Hill Rd

Benham, TX 77833

936-825-5295

stoltcattlecompany.com
  • Pregnancy serum/blood

Texas A&M Veterinary Medical Diagnostic Laboratory

Vma Bldg 107

College Station, TX 77843-0001

979-845-3414

tvmdl.tamu.edu
  • BVD
  • Johne's (MAP)
  • Neospora

Texas DHIA

301 23rd St Rm 117B

Canyon, TX 79015

806-651-8750

texasdhia.com
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood

Texas Vet Lab Inc

1702 N Bell

San Angelo, TX 76903

915-653-4505

texasvetlab.com
  • BVD
  • Pregnancy serum/blood
Utah

Utah Veterinary Diagnostic Laboratory

950 East 1400 N

Logan, UT 84322-5700

435-797-2805
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
Virginia

United DHIA

6580 Valley Center Dr

Radford, VA 24141

540-835-0014

uniteddhia.com
  • Johne's (MAP)

Va Department of Agriculture

261 Mount Clinton Pike

Harrisonburg, VA 22802

540-209-9130

vdacs.virginia.gov
  • BVD
  • Johne's (MAP)
Washington

Washington State University

100 Dairy Road

Pullman, WA 99164-1120

 

1-509-335-9696
  • BVD
  • Johne's (MAP)
  • Pregnancy serum/blood
Wisconsin

AgSource

403 Cedar Ave W

Menomonie, WI 54751

715-235-1128

agsource.com
  • BVD
  • Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood

Dairy Pharm & Diagnostic Services, LLC

362 310th Ave

Frederic, WI 54837

715-653-2201

dairydoctor.com
  • BVD

Dodge County Dairy Testing Association

244 S Fairfield Ave

Juneau, WI 53039

920-386-2637

dodgecountydhia.org
  • Johne's (MAP)

Eastern WI DHIC

718 W First St

Waldo, WI 53093

800-439-1317

ewdhic.org
  • Johne's (MAP)
  • Pregnancy milk

North Woods Veterinary Service

185607 County Road N

Birnamwood, WI 54414-9498

715-449-2843
  • BVD, Johne's (MAP)
  • Pregnancy serum/blood

CentralStar Wisconsin Lab

200 E Kelso Rd

Kaukauna, WI 54956

920-733-6598

mycentralstar.com
  • BVD, Johne's (MAP)
  • Pregnancy milk
  • Pregnancy serum/blood
  • Neospora

Waupun Veterinary Clinic

95 S Harris Ave Ste 203

Waupun, WI 53963

920-324-3831

waupunvet.com
  • BVD
  • Johne's (MAP)

Wisconsin Veterinary Diagnostic Laboratory

445 Easterday Ln

Madison, WI 53706-1253

608-262-5432

wvdl.wisc.edu
  • BVD
  • Johne's (MAP)
Wyoming

Eagle Talon Enterprises, LLC

544 Dutton Creek Rd

Laramie, WY 82070

307-742-9072
  • Johne's (MAP)

Wyoming State Veterinary Lab

1174 Snowy Range Rd

Laramie, WY 82070

307-766-9925

uwyo.edu
  • BVD
  • Johne's (MAP)

Locate a distributor

United States & Canada

Animal Health International
822 7th St. Ste. 740
Greeley, CO 80631

800-854-7664

animalhealthinternational.com
  • Alertys OnFarm
  • Dairy residue
  • BVD

Armor Animal Health
1240 Green Valley Road
Beaver Dam, WI 53916

855-254-6600

armoranimalhealth.com
  • Alertys OnFarm
  • Dairy residue

EASTGEN
5653 HWY 6 RR#5
Guelph, Ontario N1H 6J2
Canada

519-821-2150
store.eastgen.ca

 
  • Alertys OnFarm

Leedstone, Inc.
222 County Road, 173 SE
Melrose, Minnesota 56352-1602

877-608-3877

leedstone.com
  • Alertys OnFarm
  • Dairy residue
  • Pregnancy
United States

Agritech Animal Health
421 Live Oak Street
Marlin, TX 76661

1-254-883-5500
  • Alertys OnFarm
  • BVD

Allied Purchasing
P.O. Box 1249
Mason City, IA 50402-1249

800-247-5956

alliedpurchasing.com
  • Dairy residue

Animal Health Express
3301 N Freeway Road
Tucson, AZ 85705

1-520-888-0294

animalhealthexpress.com
  • BVD, Pregnancy

Bovine Elite
3300 Longmire Dr
College Station, TX 77845

979-693-0388

bovine-elite.com
  • Carrying Alertys OnFarm

CPC Animal Health
105 B Galen Road
Lafayette, TN 37083-2213 

1-615-688-7800

cpcanimalhealth.com
  • BVD

DFA Farm Supplies
5001 Brittonfield Parkway
East Syracuse, NY 13057

866-591-2925

dfafarmsupplies.com
  • Dairy residue
  • BVD

Eastern Crown Inc
PO Box 850
Vernon NY 13476

877-829-3505

easterncrowninc.com
  • Dairy residue

Hostetler Country Store
1843 Ash Street
Buffalo, MO 65622

1-417-345-7935
  • BVD

Ironsides Animal Health
136 Blue Sulphur Pike
Lewisburg, WV 24901

1-806-323-8387

jefferslivestock.com
  • BVD

Jeffers Livestock Supply
310 West Saunders Road
Dothan, AL 36301

1-800-533-3377

jefferslivestock.com
  • Alertys OnFarm
  • BVD

MWI Veterinary Supply
3041 W. Pasadena Dr
Boise, ID 83705

800-824-3703

mwiah.com
  • Alertys OnFarm
  • Dairy residue
  • BVD
  • Pregnancy

Nelson Jameson
P.O. Box 647
Marshfield, WI, 54449

800-826-8302

nelsonjameson.com
  • Dairy residue

PBS Animal Health
2780 Richville Drive SE
Massillon, OH 44646

800-321-0235

pbsanimalhealth.com
  • Alertys OnFarm
  • Dairy residue
  • BVD
  • Pregnancy

Performance Animal Health
900 Scottsville Road
Lafayette, TN 37083

1-615-699-5088

performance-feeds.com
  • Dairy residue
  • BVD

Stocker Supply
6015 Troy Hwy
Montgomery, AL 36116

1-334-280-3334
  • BVD

Weber Scientific
2732 Kuser Road
Hamilton, NJ 08691

800-328-8378

weberscientific.com
  • Dairy residue
Canada

Farmers Depot
455 Dobbie Dr.
Cambridge, Ontario N1T 1T1

866-527-6229

farmersdepot.ca
  • Dairy residue
  • Alertys OnFarm

Veterinary Purchasing Company Ltd
485 Queen Street West, PO Box 1150
St. Marys, ON N4X 1B7

519-284-1371

vpcl.on.ca
  • Dairy residue

West Country Dairy Supply
RR3 SITE 10 BOX 1 OLDS
Alberta T4H 1P4 Canada

on site
  • Dairy residue
California

Veterinary Pharmaceutical
13159 13TH RD W
Hanford, California 93230-9666

on site
  • Dairy residue
Kentucky

Trenton Farm Supply
2470 Cemetery Road
Trenton, KY 42286

on site
  • Dairy residue
Mississippi

Stockman's Supply
13545 MS HWY 12W
Starkville, Mississippi 39759

662-402-4064
  • Alertys OnFarm
New Mexico

Landmark Mercantile
12000 Stern Drive
Mesquite, NM 88048

575-635-4173

landmarkmercantile.com
  • Dairy residue
Texas

North Texas Dairy Supply
18130 US HWY 281
Winthorst, Texas 76389

on site
  • Dairy residue

Veterinarian's Outlet
975 Patrick Street
Dublin, TX 76446

800-842-0278
vetoutletinc.com
on site
  • Dairy residue
  • BVD