Works (65)

2022 journal article

A flow cytometric method for enumeration and speciation of coccidia affecting broiler chickens

Veterinary Parasitology.

By: D. Adams, R. Kulkarni, J. Mohammed & R. Crespo

Source: ORCID
Added: December 1, 2021

2021 journal article

Comparison of portable and conventional laboratory analyzers for biochemical tests in chickens

POULTRY SCIENCE, 100(2), 746–754.

By: F. Ruiz-Jimenez, E. Gruber, M. Correa & R. Crespo

Sources: Web Of Science, ORCID
Added: March 15, 2021

2021 journal article

Development of a Dissemination Platform for Spatiotemporal and Phylogenetic Analysis of Avian Infectious Bronchitis Virus

FRONTIERS IN VETERINARY SCIENCE, 5.

By: M. Jara, R. Crespo, D. Roberts, A. Chapman, A. Banda & G. Machado

Sources: Web Of Science, ORCID
Added: June 14, 2021

2021 journal article

Genomic Characterization of a Nalidixic Acid-Resistant Salmonella Enteritidis Strain Causing Persistent Infections in Broiler Chickens

FRONTIERS IN VETERINARY SCIENCE, 9.

By: G. Walker, M. Suyemoto, D. Hull, S. Gall, F. Jimenez, L. Chen, S. Thakur, R. Crespo, L. Borst

Sources: Web Of Science, ORCID
Added: September 27, 2021

2021 journal article

Unraveling the Contact Network Patterns between Commercial Turkey Operation in North Carolina and the Distribution of Salmonella Species

Pathogens.

By: C. Ellington, C. Hebron, R. Crespo & G. Machado

Source: ORCID
Added: December 1, 2021

2020 journal article

Effect of broiler genetics, age, and gender on performance and blood chemistry

HELIYON, 6(7).

By: M. Livingston, A. Cowieson, R. Crespo, V. Hoang, B. Nogal, M. Browning, K. Livingston

Sources: Web Of Science, ORCID
Added: August 31, 2020

2020 journal article

Effect of coccidial challenge and vaccination on the performance, veterinary postmortem scores, and blood biochemistry of broiler chickens

POULTRY SCIENCE, 99(8), 3831–3840.

By: A. Cowieson, M. Livingston, B. Nogal, V. Hoang, Y. Wang, R. Crespo, K. Livingston

Sources: Web Of Science, ORCID
Added: August 17, 2020

2019 article

Bacterial Diversity in Feces of Wild Bald Eagles, Turkey Vultures and Common Ravens from the Pacific Northwest Coast, U.S.A

Crespo, R., Dowd, S. E., Varland, D. E., Ford, S., & Hamer, T. E. (2019, January 3). (Vol. 1). Vol. 1.

By: R. Crespo, S. Dowd, D. Varland, S. Ford & T. Hamer

Source: ORCID
Added: April 26, 2020

2019 journal article

Haemoproteosis lethality in a woodpecker, with molecular and morphological characterization of Haemoproteus velans (Haemosporida, Haemoproteidae)

International Journal for Parasitology: Parasites and Wildlife, 10, 93–100.

By: T. Groff, T. Lorenz, R. Crespo, T. Iezhova, G. Valkiūnas & R. Sehgal

Sources: Crossref, ORCID
Added: August 29, 2019

2019 journal article

Use of Commercial Swine Live Attenuated Vaccine to Control an Erysipelothrix rhusiopathiae Outbreak in Commercial Cage-Free Layer Chickens

AVIAN DISEASES, 63(3), 520–524.

By: R. Crespo, M. Bland & T. Opriessnig

Sources: Web Of Science, ORCID
Added: April 20, 2020

2018 journal article

Biochemical Reference Intervals for Backyard Hens

JOURNAL OF AVIAN MEDICINE AND SURGERY, 32(4), 301–306.

By: M. Board, R. Crespo, D. Shah & C. Faux

Sources: NC State University Libraries, ORCID
Added: February 11, 2019

2018 chapter

Galliformes and Columbiformes

In Pathology of Wildlife and Zoo Animals (pp. 747–773).

By: R. Crespo, M. França, H. Fenton & H. Shivaprasad

Sources: Crossref, ORCID
Added: September 8, 2019

2016 journal article

Inactivation of Infectious Bursal Disease Virus Through Composting of Litter from Poultry Houses

Avian Diseases, 60(2), 506–510.

By: R. Crespo, L. Badcoe, C. Williams & A. Bary

Sources: Crossref, ORCID
Added: September 8, 2019

2016 journal article

Population dynamics and antimicrobial resistance of the most prevalent poultry-associated Salmonella serotypes

Poultry Science, 96(3), 687–702.

By: D. Shah, N. Paul, W. Sischo, R. Crespo & J. Guard

Sources: Crossref, ORCID
Added: September 29, 2019

2016 chapter

Urate Deposition (Gout)

In The Merck Veterinary Manual (11th ed.). Retrieved from http://www.merckvetmanual.com/poultry/miscellaneous-conditions-of-poultry/urate-deposition-gout-in-poultry.

By: R. Crespo

Source: NC State University Libraries
Added: September 11, 2019

2015 journal article

Avian Hepatitis E Virus Infection in Organic Layers

Avian Diseases, 59(3), 388–393.

By: R. Crespo, T. Opriessnig, F. Uzal & P. Gerber

Sources: Crossref, ORCID
Added: January 5, 2020

2015 journal article

Comparison of conventional plating methods and Petrifilm for the recovery of aerobic bacteria and mold from hatchery fluff samples

The Journal of Applied Poultry Research, 25(1), 48–53.

By: C. Warren, S. Weber & R. Crespo

Sources: Crossref, ORCID
Added: September 11, 2019

2015 chapter

Diagnostic Lab Sampling

In C. B. Greenacre & T. Y. Morishita (Eds.), Backyard Poultry Medicine and Surgery: A Guide for Veterinary Practitioners (pp. 275–282). Hoboken, New Jersey: Wiley-Blackwell.

By: R. Crespo & H. Shivaprasad

Ed(s): C. Greenacre & T. Morishita

Source: NC State University Libraries
Added: February 12, 2021

2015 chapter

Interpretation of Laboratory Results and Values

In C. B. Greenacre & T. Y. Morishita (Eds.), Backyard Poultry Medicine and Surgery: A Guide for Veterinary Practitioners (pp. 283–296). Hoboken, New Jersey: Wiley-Blackwell.

By: R. Crespo & H. Shivaprasad

Ed(s): C. Greenacre & T. Morishita

Source: NC State University Libraries
Added: February 12, 2021

2015 chapter

Laboratory Diagnostic Procedures in Poultry

In J. Brugere-Picoux & J.-P. Vaillancourt (Eds.), Manual of Poultry Disease (2nd ed., pp. 126–133). French Association for the Advancement of Science (AFAS).

By: R. Crespo

Ed(s): J. Brugere-Picoux & J. Vaillancourt

Source: NC State University Libraries
Added: February 12, 2021

2015 journal article

Novel Eurasian Highly Pathogenic Avian Influenza A H5 Viruses in Wild Birds, Washington, USA, 2014

Emerging Infectious Diseases, 21(5), 886–890.

By: H. Ip, M. Torchetti, R. Crespo, P. Kohrs, P. DeBruyn, K. Mansfield, T. Baszler, L. Badcoe ...

Sources: Crossref, ORCID
Added: January 5, 2020

2015 journal article

Postmortem Survey of Disease Conditions in Backyard Poultry

Journal of Exotic Pet Medicine, 24(2), 156–163.

By: R. Crespo & G. Senties-Cue

Sources: Crossref, ORCID
Added: January 5, 2020

2014 journal article

Evaluation of passive immunotherapeutic efficacy of hyperimmunized egg yolk powder against intestinal colonization of Campylobacter jejuni in chickens

Poultry Science, 93(11), 2779–2787.

By: N. Paul, S. Al-Adwani, R. Crespo & D. Shah

Sources: Crossref, ORCID
Added: January 5, 2020

2014 journal article

Reducing Campylobacter jejuni Colonization of Poultry via Vaccination

PLoS ONE, 9(12), e114254.

By: J. Neal-McKinney, D. Samuelson, T. Eucker, M. Nissen, R. Crespo & M. Konkel

Ed(s): S. Bereswill

Sources: Crossref, ORCID
Added: August 29, 2019

2013 chapter

Miscellaneous diseases

In D. Swayne (Ed.), Diseases of Poultry (13th ed., pp. 1233–1270). Ames, Iowa. Pages: Iowa State Press.

By: R. Crespo & H. Shivaprasad

Ed(s): D. Swayne

Source: NC State University Libraries
Added: February 20, 2021

2013 journal article

Outbreak of Listeria monocytogenes in an urban poultry flock

BMC Veterinary Research, 9(1), 204.

By: R. Crespo, M. Garner, S. Hopkins & D. Shah

Sources: Crossref, ORCID
Added: August 29, 2019

2013 journal article

Production and Evaluation of Chicken Egg-Yolk-Derived Antibodies Against Campylobacter jejuni Colonization-Associated Proteins

Foodborne Pathogens and Disease, 10(7), 624–631.

By: S. Al-Adwani, R. Crespo & D. Shah

Sources: Crossref, ORCID
Added: January 5, 2020

2013 journal article

Ulcerative Enteritis-like Disease Associated with Clostridium sordellii in Quail

Avian Diseases, 57(3), 698–702.

By: R. Crespo, M. Franca & H. Shivaprasad

Sources: Crossref, ORCID
Added: August 29, 2019

2013 book

Velogenic Newcastle-slide study set

Jacksonville, FL: American Association of Avian Pathologists.

By: H. Shivaprasad & R. Crespo

Source: NC State University Libraries
Added: February 20, 2021

2012 journal article

Detection of Salmonella Enteritidis (SE) Bacterin in Environmental Samples from Poultry Houses Using the RapidChek SE Immunoassay

Avian Diseases, 56(3), 621–624.

By: R. Crespo, D. Schaberg & C. Warren

Sources: Crossref, ORCID
Added: January 5, 2020

2011 journal article

Rupture of Gastrocnemius Tendon in Broiler Breeder Hens

Avian Diseases, 55(3), 495–498.

By: R. Crespo & H. Shivaprasad

Sources: Crossref, ORCID
Added: January 5, 2020

2010 journal article

Decrease of Fertility in a Broiler Breeder Flock due to Testicular Atrophy

Avian Diseases, 54(1), 142–145.

By: R. Crespo & H. Shivaprasad

Sources: Crossref, ORCID
Added: January 5, 2020

2010 journal article

Pet Poultry Training for Veterinary Practitioners

Journal of Veterinary Medical Education, 37(4), 383–387.

By: R. Crespo, C. Faux, S. Dhillon, R. Newberry & D. Moore

Sources: Crossref, ORCID
Added: January 5, 2020

2010 journal article

Retrospective Study of Myocarditis Associated with Reovirus in Turkeys

Avian Diseases, 54(3), 1026–1031.

By: M. França, R. Crespo, R. Chin, P. Woolcock & H. Shivaprasad

Sources: Crossref, ORCID
Added: January 5, 2020

2010 chapter

Urate Deposition (Gout)

In The Merck Veterinary Manual (10th ed., p. 2473). Whitehouse Station, New Jersey. Page: Merck & Co. Inc.

By: R. Crespo

Source: NC State University Libraries
Added: February 20, 2021

2009 journal article

Intervention Strategies for Laryngotracheitis: Impact of Extended Downtime and Enhanced Biosecurity Auditing

Avian Diseases, 53(4), 574–577.

By: R. Chin, M. García, C. Corsiglia, S. Riblet, R. Crespo, H. Shivaprasad, A. Rodríguez-Avila, P. Woolcock, M. França

Sources: Crossref, ORCID
Added: February 12, 2021

2009 journal article

Isolation and Distribution of West Nile Virus in Embryonated Chicken Eggs

Avian Diseases, 53(4), 608–612.

By: R. Crespo, H. Shivaprasad, M. França & P. Woolcock

Sources: Crossref, ORCID
Added: September 1, 2020

2008 journal article

Bilateral Malacia Associated with Sodium Poisoning in Turkey Poults

Avian Diseases, 52(1), 179–182.

By: R. Crespo, M. Subbiah, C. Corsiglia, A. Bickford & B. Puschner

Sources: Crossref, ORCID
Added: September 1, 2020

2008 journal article

Coxiella-Like Infection in Psittacines and a Toucan

Avian Diseases, 52(3), 426–432.

By: H. Shivaprasad, M. Cadenas, S. Diab, R. Nordhausen, D. Bradway, R. Crespo, E. Breitschwerdt

Sources: Crossref, ORCID
Added: September 1, 2020

2008 journal article

Facial Cellulitis Induced in Chickens by Mycoplasma gallisepticum Bacterin and Its Treatment

Avian Diseases, 52(4), 698–701.

By: R. Crespo & R. McMillan

Sources: Crossref, ORCID
Added: February 12, 2021

2008 journal article

Interaction of Ionophore and Vitamin E in Knockdown Syndrome of Turkeys

Journal of Veterinary Diagnostic Investigation, 20(4), 472–476.

By: R. Crespo, H. Shivaprasad, F. Sommer & B. Puschner

Sources: Crossref, ORCID
Added: September 1, 2020

2008 chapter

Miscellaneous diseases

In Y. M. Saif (Ed.), Diseases of Poultry (12th ed., pp. 1149–1195). Ames, Iowa. Pages: Iowa State Press.

By: R. Crespo & H. Shivaprasad

Ed(s): Y. Saif

Source: NC State University Libraries
Added: February 20, 2021

2007 journal article

Comparison of Diagnostics Techniques in an Outbreak of Infectious Laryngotracheitis from Meat Chickens

Avian Diseases, 51(4), 858–862.

By: R. Crespo, P. Woolcock, R. Chin, H. Shivaprasad & M. García

Sources: Crossref, ORCID
Added: September 1, 2020

2007 journal article

Toxinotypes of Clostridium Perfringens Isolated from Sick and Healthy Avian Species

Journal of Veterinary Diagnostic Investigation, 19(3), 329–333.

By: R. Crespo, D. Fisher, H. Shivaprasad, M. Fernández-Miyakawa & F. Uzal

Sources: Crossref, ORCID
Added: September 1, 2020

2006 journal article

Otitis Interna (Labyrinthitis) Associated with Salmonella enterica arizonae in Turkey Poults

Avian Diseases, 50(1), 135–138.

By: H. Shivaprasad, P. Cortes & R. Crespo

Sources: Crossref, ORCID
Added: February 12, 2021

2006 journal article

Skin and Abdominal Fascia Melanization in Broiler Chickens

Avian Diseases, 50(2), 309–311.

By: R. Crespo & M. Pizarro

Sources: Crossref, ORCID
Added: September 1, 2020

2006 journal article

Vitamin a Deficiency in Turkey Poults

Journal of Veterinary Diagnostic Investigation, 18(5), 489–494.

By: P. Cortes, A. Tiwary, B. Puschner, R. Crespo, R. Chin, M. Bland, H. Shivaprasad

Sources: Crossref, ORCID
Added: September 1, 2020

2004 journal article

Coronary artery rupture in male commercial turkeys

Avian Pathology, 33(2), 226–232.

By: H. Shivaprasad, R. Crespo & B. Puschner

Sources: Crossref, ORCID
Added: September 1, 2020

2004 journal article

Effect of Feeding Green Onions (Allium Ascalonicum) to White Chinese Geese (Threskiornis Spinicollis)

Journal of Veterinary Diagnostic Investigation, 16(4), 321–325.

By: R. Crespo & R. Chin

Sources: Crossref, ORCID
Added: September 1, 2020

2004 journal article

Histomoniasis in the Bursa of Fabricius of Chickens

Avian Diseases, 48(3), 711–715.

By: P. Cortes, R. Chin, M. Bland, R. Crespo & H. Shivaprasad

Sources: Crossref, ORCID
Added: September 1, 2020

2004 journal article

Phenotypic and Genotypic Characterization of Salmonella arizonae from an Integrated Turkey Operation

Avian Diseases, 48(2), 344–350.

By: R. Crespo, J. Jeffrey, R. Chin, G. Sentíes-Cué & H. Shivaprasad

Sources: Crossref, ORCID
Added: February 12, 2021

2003 journal article

Focal Transmural Necrotic Tracheitis in Commerical Meat Turkeys

Avian Diseases, 47(1), 234–239.

By: G. Sentíes-Cué, R. Crespo & R. Chin

Sources: Crossref, ORCID
Added: February 12, 2021

2003 chapter

Miscellaneous diseases

In Y. M. Saif (Ed.), Diseases of Poultry (11th ed., pp. 1055–1102). Ames, Iowa. Pages: Iowa State Press.

By: R. Crespo & H. Shivaprasad

Ed(s): Y. Saif

Source: NC State University Libraries
Added: February 20, 2021

2002 journal article

Avulsion of the Common Retinaculum in Meat Turkeys

Avian Diseases, 46(1), 245–248.

By: R. Crespo, G. Ghazikhanian & C. Hall

Sources: Crossref, ORCID
Added: February 12, 2021

2002 journal article

Characterization of T-cell lymphomas associated with an outbreak of reticuloendotheliosis in turkeys

Avian Pathology, 31(4), 355–361.

By: R. Crespo, P. Woolcock, A. Fadly, C. Hall & H. Shivaprasad

Sources: Crossref, ORCID
Added: September 1, 2020

2002 journal article

Microstructure and mineral content of femora in male turkeys with and without fractures

Poultry Science, 81(8), 1184–1190.

By: R. Crespo, S. Stover, H. Shivaprasad & R. Chin

Sources: Crossref, ORCID
Added: February 12, 2021

2002 journal article

Myopathy in brown pelicans (Pelicanus occidentalis) associated with rancid feed

Veterinary Record, 150(10), 307–311.

By: H. Shivaprasad, R. Crespo, B. Puschner, S. Lynch & L. Wright

Sources: Crossref, ORCID
Added: February 12, 2021

2001 journal article

Salpingitis in Pekin Ducks Associated with Concurrent Infection with Tetratrichomonas sp. and Escherichia Coli

Journal of Veterinary Diagnostic Investigation, 13(3), 240–245.

By: R. Crespo, R. Walker, R. Nordhausen, S. Sawyer & R. Manalac

Sources: Crossref, ORCID
Added: February 12, 2021

2000 journal article

Morphometric and mechanical properties of femora in young adult male turkeys with and without femoral fractures

Poultry Science, 79(4), 602–608.

By: R. Crespo, S. Stover, K. Taylor, R. Chin & H. Shivaprasad

Sources: Crossref, ORCID
Added: February 12, 2021

1999 journal article

Exotic Newcastle Disease in a Game Chicken Flock

Avian Diseases, 43(2), 349.

By: R. Crespo, H. Shivaprasad, P. Woolcock, R. Chin, D. Davidson-York & R. Tarbell

Sources: Crossref, ORCID
Added: September 1, 2020

1999 journal article

Femoral Fractures in a Young Male Turkey Breeder Flock

Avian Diseases, 43(1), 150–154.

By: R. Crespo, S. Stover, R. Droual, R. Chin & H. Shivaprasad

Sources: Crossref, ORCID
Added: February 12, 2021

1998 journal article

Development of the Thoracic Air Sacs of Turkeys with Age and Rearing Conditions

Avian Diseases, 42(1), 35.

By: R. Crespo, S. Yamashiro & D. Hunter

Sources: Crossref, ORCID
Added: September 1, 2020

1998 journal article

Endoscopic Gross Anatomy Findings of the Thoracic Air Sac of the Turkey

Avian Diseases, 42(1), 179.

By: R. Crespo, M. Taylor & D. Hunter

Sources: Crossref, ORCID
Added: September 1, 2020

1998 journal article

Evaluation of Different Procedures for Processing Avian Air Sac Lavage Fluid

Avian Diseases, 42(1), 20.

By: R. Crespo, T. Stirtzinger & D. Hunter

Sources: Crossref, ORCID
Added: September 1, 2020

1998 journal article

Inclusion Body Tracheitis Associated with Avian Adenovirus in Turkeys

Avian Diseases, 42(3), 589–596.

By: R. Crespo, H. Shivaprasad, R. Droual, R. Chin, P. Woolcock & T. Carpenter

Sources: Crossref, ORCID
Added: February 12, 2021

Employment

2018 - present

North Carolina State University Raleigh, NC, US
professor Population Health and Pathobiology, College of Veterinary Medicine

2009 - 2018

Washington State University Pullman, WA, US
professor Washington Animal Disease Diagnostic Laboratory, College of Veterinary Medicine

1996 - 2009

University of California Davis Davis, CA, US
Associate Professor and Branch Chief California Animal Health and Food Safety, College of Veterinary Medicine

Education

1993 - 1996

University of Guelph Guelph, ON, CA
DVSc Pathobiology, Ontario Veterinary College

1990 - 1993

University of Guelph Guelph, ON, CA
MS Animal Science

1983 - 1988

Universidad Complutense de Madrid Madrid, Comunidad de Madrid, ES
Licenciado veterinario