Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
Anaplasmosis is a condition recognized more frequently in the bovine in recent years. However, even more important is the fact that it is becoming more prevalent in areas outside the epizootic areas. The organism was first observed by workers studying Texas cattle fever, therefore it is plausible these men were often seeing cattle with two conditions.
Lanz, R. N. and Hull, B. L.
"Anaplasmosis in a Hereford Cow,"
Iowa State University Veterinarian: Vol. 33
, Article 2.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol33/iss1/2