Dr. Lin Walker: Controlling Salmonella in Litter | Ep. 171

In this episode of The Poultry Podcast Show, Dr. Lin Walker, Assistant Professor and Extension Specialist in Applied Microbiology at North Carolina State University, discusses managing Salmonella in poultry litter and the factors influencing microbial survival. She explains how litter moisture, water activity, and pH interact to shape Salmonella persistence, and how litter amendments like sodium bisulfate can help reduce risk. Learn practical, science-based strategies to improve food safety in poultry operations. Listen now on all major platforms!

“Water activity represents the free water available for bacterial metabolism and is a key indicator of contamination risk.”

Meet the guest: Dr. Lin Walker is an Assistant Professor and Extension Specialist in Applied Microbiology at North Carolina State University. Her research focuses on reducing foodborne pathogens during preharvest and postharvest stages to enhance poultry and egg product safety. With extensive experience in pathogen detection, Dr. Walker’s work bridges research and field applications to improve food safety compliance. 

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What you will learn:

• (00:00) Highlight
• (01:17) Introduction
• (01:49) Salmonella cycle in litter
• (03:10) Litter environment factors
• (04:36) Water activity explained
• (07:33) Litter amendments impact
• (11:34) Best litter management
• (15:13) Final Questions

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