header
March 2026

Neonatal Calf Diarrhea Panel Results: 2025

By Gregg A. Hanzlicek, DVM, PhD, PAS

The graphs below describe the PCR test results for samples submitted to the KVDL in 2025.

Approximately 22% of the samples resulted in negative results. Swab samples were 3 times more likely to be negative compared to fecal samples. Graph 1

Over 50% of the samples contained Crypto sp. and over 30% contained Rotavirus. Graph 1

Graph 1. Percentage of Samples Negative or Containing Each Pathogen.

Graph 1. Horizontal bar chart showing pathogen percentages. Crypto is highest at 57%, followed by rotavirus at 34.5%. All other categories range from 1.6% to 21.8%.

Cryptosporidium sp. was the pathogen most likely reported as the only pathogen contained in the sample. About ½ as many were found with only Rotavirus. Graph 2.

Graph 2. Single Pathogen Positive Samples

Graph 2. Horizontal bar chart showing pathogen-only detections. Crypto is most common at 33.1%, followed by rotavirus at 15.4%. All other pathogens appear at 2.2% or below.

Data was analyzed investigating all 2, 3, 4 pathogen combinations. Cryptosporidium sp. and Rotavirus were the most common combinations. Other combinations were uncommon. Graph 3.

Graph 3. Percentage of positive samples and the most common pathogen combinations.

Graph 3. Horizontal bar chart showing co‑infection percentages. Crypto & Rota is highest at 13.9%, followed by Corona & Crypto at 4.1%. All other combinations are 2% or below.

Next: Timely Tests
Return to Index