Unpasteurized Milk and Listeria

Food and Nutrition

Obie Editorial Team

Empowering Information about Pasteurization and Listeriosis during Pregnancy Unpasteurized milk and products derived from it can lead to listeriosis, a type of food poisoning caused by Listeria monocytogenes. For detailed insights on pregnancy, check this resource. Listeriosis presents a significant risk during pregnancy, with potential complications such as miscarriage, premature birth, stillbirth, or serious illness of the newborn.

While most people manage to dodge illness from Listeria-contaminated foods, pregnant individuals must exercise extra caution, as they are more susceptible and the consequences are more severe.

Pasteurization Methods

While pasteurization is widely discussed in the context of milk, it's applied to various foods, ensuring they are safe for consumption. Here are the two powerful methods:

  1. Heating foods to 145 degrees Fahrenheit (63 degrees Celsius) for a minimum of 30 minutes.
  2. Flash pasteurization: Heating to 161 degrees Fahrenheit (72 degrees Celsius) for at least 16 seconds.

Proactive Tips for Safe Consumption

Empower yourself by reading labels carefully: Ensure your cheeses are made from pasteurized milk. Keep an eye out for these specific types of cheeses, which should only be consumed if they are clearly labeled as pasteurized:

  • Feta
  • Brie
  • Camembert
  • Blue-veined cheeses
  • Mexican-style cheeses (queso blanco, queso fresco, Panela)

Rest assured, it’s safe to enjoy hard cheeses, semi-soft cheeses like mozzarella, pasteurized processed cheese slices and spreads, cream cheese, and cottage cheese.

Recognizing and Responding to Symptoms

Listeriosis can initially mimic common flu symptoms like fever, muscle aches, chills, and occasionally nausea or diarrhea. However, it can escalate into severe conditions such as meningitis and blood infections. If you're experiencing any of these symptoms, it is crucial to contact your healthcare provider. They can conduct a blood test to confirm Listeriosis and, if needed, provide antibiotics that may help prevent fetal infections, thereby reducing the risk of miscarriage or stillbirth.