Infections
What is Infections?
An infection happens when harmful germs like bacteria, viruses, fungi, or parasites invade your body and start to multiply. Your immune system fights back by producing antibodies and white blood cells to destroy these invaders. Most infections cause symptoms like fever, fatigue, or inflammation as your body battles the germs.
Infections can be acute or chronic. Acute infections develop quickly and last a short time, like a cold or flu. Chronic infections persist for weeks, months, or even years. These long-lasting infections keep your immune system on high alert, which can show up in your blood work.
Understanding your infection status through blood testing helps you and your doctor respond quickly. Early detection means faster treatment and better outcomes. Blood tests can reveal active infections, past infections, and how well your immune system is working.
Symptoms
- Fever or chills that come and go
- Fatigue that does not improve with rest
- Body aches and muscle pain
- Swollen lymph nodes in your neck, armpits, or groin
- Headaches or dizziness
- Nausea, vomiting, or diarrhea
- Cough or difficulty breathing
- Skin rashes or sores
- Night sweats
- Unexplained weight loss
Some infections cause no symptoms at first, especially chronic infections. Your body may fight off germs silently for weeks or months before you feel sick. This is why regular blood testing matters for catching infections early.
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Causes and risk factors
Infections develop when germs enter your body through cuts, contaminated food or water, insect bites, or breathing in airborne particles. Your risk increases if you have a weakened immune system from stress, poor nutrition, lack of sleep, or chronic illness. Close contact with infected people also raises your chances of getting sick.
Other risk factors include not washing your hands regularly, traveling to areas with high infection rates, and having unprotected contact with bodily fluids. Medical procedures like surgery or catheter use can introduce germs into your body. Chronic conditions like diabetes make it harder for your body to fight off infections.
How it's diagnosed
Doctors diagnose infections through a combination of physical exams, symptoms, and laboratory tests. Blood tests are among the most important tools for detecting infections. Your white blood cell count shows how actively your immune system is fighting germs. High levels often mean an active infection.
Antibody tests like IgG measure your immune response to specific infections. High IgG levels suggest a chronic or past infection. Titer tests measure antibody concentration and help track active infections. Complement proteins like C1q show how your immune system is responding. Low C1q can indicate your body is using up these proteins to fight severe infections. Rite Aid offers testing for these key infection markers through Quest Diagnostics locations nationwide.
Treatment options
- Get plenty of rest to help your immune system recover
- Stay hydrated with water, herbal tea, and broths
- Eat nutrient-dense foods rich in vitamins C, D, and zinc
- Take antibiotics only if prescribed for bacterial infections
- Use antiviral medications for certain viral infections as directed
- Apply antifungal treatments for fungal infections
- Reduce stress through meditation, gentle exercise, or breathing techniques
- Avoid alcohol and smoking during recovery
- Follow up with your doctor if symptoms worsen or do not improve
- Get vaccinations to prevent future infections
Concerned about Infections? Get tested at Rite Aid.
- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
Blood tests measure white blood cells, antibodies, and immune proteins that rise when your body fights germs. High white blood cell counts often indicate an active infection. Antibody tests like IgG show if you have had or currently have specific infections. These markers help doctors identify infections even before symptoms appear.
Acute infections develop quickly and typically resolve within days to weeks with treatment. Chronic infections persist for months or years and may cause ongoing or intermittent symptoms. Chronic infections keep your immune system constantly activated, which shows up as elevated antibody levels in blood tests. Both types require different treatment approaches.
Yes, many infections cause no symptoms in the early stages or in people with strong immune systems. Your body may be fighting off germs without you knowing it. This is called an asymptomatic infection. Regular blood testing can detect these hidden infections before they cause problems.
High white blood cell counts usually mean your immune system is fighting an infection or inflammation. Your body produces more white blood cells to attack invading germs. Other causes include stress, smoking, certain medications, or inflammatory conditions. Your doctor will look at your full blood panel and symptoms to determine the cause.
High IgG levels suggest your body has been producing antibodies to fight a chronic or past infection. IgG antibodies stay in your blood for months or years after an infection. Elevated levels can indicate an ongoing immune response to persistent germs. Your doctor may order additional tests to identify the specific infection.
Recovery time depends on the type and severity of the infection. Mild viral infections often clear up in 7 to 10 days. Bacterial infections may improve within a few days of starting antibiotics. Chronic or severe infections can take weeks to months to fully resolve with proper treatment and immune support.
See a doctor if you have a fever above 103°F, symptoms lasting more than a week, or severe pain. Seek immediate care for difficulty breathing, chest pain, confusion, or signs of dehydration. People with weakened immune systems or chronic conditions should see a doctor at the first sign of infection.
Yes, healthy habits strengthen your immune system and reduce infection risk. Wash your hands regularly, especially before eating or touching your face. Get 7 to 9 hours of sleep each night to support immune function. Eat a varied diet rich in fruits, vegetables, and lean proteins. Exercise regularly and manage stress to keep your immune system strong.
No, antibiotics only work for bacterial infections and have no effect on viruses, fungi, or parasites. Taking antibiotics unnecessarily can lead to antibiotic resistance and harm helpful bacteria in your gut. Your doctor will determine if antibiotics are needed based on your symptoms and test results. Many viral infections resolve on their own with rest and supportive care.
Regular testing depends on your health status and risk factors. People with chronic conditions, weakened immune systems, or frequent illnesses may benefit from testing every 6 months. Healthy adults can test annually as part of preventive health screening. Rite Aid offers twice-yearly testing to help catch infections and other health issues early.