Marcelo Almeida

Education & Certifications  

PhD, Population Sciences in Animal Health, Iowa State University, 2020

MS, Preventive Veterinary Microbiology, Universidade Federal do Rio Grande do Sul, 2008

DVM, Universidade de Brasilia, 2003


VDPAM 308 – Spanish for Veterinarians, Instructor-in-charge

Research Focus & Interests  

Dr. Almeida’s is focused on diseases of pigs especially PRRSV, IAV, PEDV, E. coli, APP, PCV2, PCV3. Recent research focus has been:

Escherichia coli in pigs, control strategies, vaccination, characterization, vaccine development

Actinobacillus pleuropneumonia, persistence and dynamics in populations, vaccine development

PRRSV virulence of different stains, control strategies, and surveillance

Honors & Awards  

2019       Livestock Respiratory Diseases Graduate Fellowship, 2019 – ISU CVM, Ames, IA.

2017       Best Poster Award (2nd place), Summer Scholar Research Day – ISU CVM, Ames, IA.


American Association of Swine Veterinarians (AASV)

PRRSV task force committee, 2020-present


American Association of Swine Veterinarians (AASV)

Selected Publications  

Google Scholar Page

Rawal G, ALMEIDA MN, Gauger PC, Zimmerman JJ, Ye F, Rademacher CJ, Armenta-Leyva B, Munguia-Ramirez B, Tarasiuk G, Schumacher LL, Aljets EK, Thomas JT, Zhu J, Frenier JL, Zhang J. Characterization of the recently emerged PRRSV 1-4-4 L1C variant (L1C.5) in comparison with other lineage 1 PRRSV-2 isolates. 2023. Viruses 15 (11), 2240.

Osemeke OH, Costa EF, ALMEIDA MN, Trevisan G, Ghosh AP, Silva G, Linhares DCL. Effect of pooling family oral fluids on the probability of PRRSV RNA detection by RT-rtPCR. 2022. Prev Vet Med 206(7):105701.

ALMEIDA MN, Zhang M, Lopez WAL, Vilalta C, Sanhueza J, Corzo C, Zimmerman JJ, Linhares DCL.  A comparison of three sampling approaches for detecting PRRSV in suckling piglets. 2021. Prev Vet Med 194:105427

ALMEIDA MN, Zhang M, Zimmerman JJ, Holtkamp DJ, Linhares DCL.  Finding PRRSV in sow herds: family oral fluids vs. serum samples from due-to-wean pigs. 2021. Prev Vet Med 193:105397

ALMEIDA MN, Corzo C, Zimmerman JJ, Linhares DCL.  Longitudinal sampling in comercial sow farms highlights the challenge of PRRSV detection. 2021. Porcine Health Manag. 12;7(1):31

Trevisan G, Schwartz KJ, Burrough ER, Arruda B, Derscheid RJ, Rahe MC, Magalhaes ED, ALMEIDA MN, Main RG, Linhares DCL.  Visualization and application of disease diagnosis codes for population health management using porcine diseases as a model.  2021. J Vet Diag Invest 33(3):428-438.

Holtkamp DJ, Torremorell M, Corzo CA, Linhares DCL, ALMEIDA MN, Yeske P, Polson DD, Becton L, Snelson H, Donovan T, Pittman J, Johnson C, Vilalta C, Silva GS, Sanhueza J.  Proposed modification to the porcine reproductive and respiratory syndrome virus herd classification.  J Swine Health Prod. 2021;29(5):261-270.

ALMEIDA MN, Rotto H, Schneider P, Robb C, Zimmerman JJ, Holtkamp DJ, Rademacher CJ, Linhares DCL.  2020.  Collecting oral fluid samples from due-to-wean litters.  Prev Vet Med 174:104810.

ALMEIDA MN, Zimmerman JJ, Wang C, Linhares DCL.  2018.  Assessment of abattoir based monitoring for PRRSV using oral fluids.  Prev Vet Med 158:137-145.

ALMEIDA MN, Gheller NB, Lippke RT, Mores TJ, Oliveira FTT, Bernardi ML, Corbellini LG, Barcellos DESN.  2009.  Factors contributing to lack of uniformity of slaughter pigs.  Acta Scientiae Veterinariae 37:31-37.