- What are infections and who is at risk?
- What can people with cancer do to prevent infections?
- Vaccines during cancer treatment
- Precautions to help prevent infection during cancer treatment
- Medicines to prevent infections during cancer treatment
- What are signs of infection in people with cancer?
- How does the body normally resist infections?
- Why are people with cancer more likely to get infections?
- Immunosuppression and neutropenia
- How cancer can increase risk of infection
- How cancer treatment can increase the risk of infection
- How nutrition affects risk of infection in people with cancer
- What are the risk factors that mean infections could be serious?
- How does the doctor know what kind of infection a person with cancer has?
- What kinds of germs cause infections in people with cancer?
- How is infection treated in people with cancer?
- To learn more
How nutrition affects risk of infection in people with cancer
All cells need nutrients to grow and work. Lack of vitamins, minerals, calories, and protein can weaken your immune system and make it less able to find and destroy germs. This means people who are poorly nourished (malnourished) are more likely to develop infections. People who are malnourished either do not take in enough calories and nutrients, or the body can’t use the food it takes in. Either way, it can weaken your immune system.
People with cancer often need extra calories and protein to support their immune system cells and other tissues. For example, recovery from surgery increases the body’s need for nutrients. People with cancer might be poorly nourished for many reasons:
- The cancer itself can make it hard to eat or digest food. This is common in people with cancers of the digestive system, mouth, or throat.
- Cancer treatments, like radiation therapy and chemotherapy, can cause nausea and a loss of appetite.
- Cancer cells use up nutrients, leaving less to meet the needs of normal, healthy tissues.
People with cancer often need help from dietitians or doctors to get enough calories and nutrients. Dietary supplements, tube feedings, or even intravenous (IV, through a vein) feedings may help in some cases.
Good nutrition, stress management, and good self-care might help improve the immune function of people with cancer, which may help prevent some infections. Your doctor might have you meet with a dietitian to plan what you should eat and for help managing eating problems. Nutrition counseling should include the importance of getting enough calories, protein, and vitamins. This is tailored to each person’s food intake and nutrition problems. Other therapies such as biofeedback, humor, music therapy, guided imagery, counseling, and meditation may help manage stress and make it easier to eat. Learn more about what to eat during cancer treatment in our document Nutrition for the Person With Cancer.
Last Medical Review: 11/06/2013
Last Revised: 11/06/2013