E.coli O:157, antigen (qualitative)

O:157 (Calitativ)

We remind you that independent interpretation of the results is unacceptable, the information provided below is for reference purposes only.

O:157 (Calitativ) is a diagnostic test used to detect the presence of the O157 strain of the bacteria Escherichia coli (E. coli). This strain is particularly notable because it can produce Shiga toxin, a potent toxin that can cause severe illness, including hemorrhagic colitis and hemolytic uremic syndrome (HUS).

Significance of O:157 Detection

E. coli O157 is a significant public health concern, as it can cause serious foodborne illnesses. This bacterial strain is commonly associated with the consumption of contaminated foods, such as undercooked ground beef, unpasteurized milk or juice, and fresh produce like leafy greens and sprouts.

The detection of O:157 in a sample can indicate the presence of an infection caused by this particular strain of E. coli. Prompt identification is crucial for appropriate treatment and implementation of preventive measures to control the spread of the infection.

The O:157 (Calitativ) test is typically performed on stool samples, but it can also be used to test food or environmental samples for the presence of this specific E. coli strain. The test results can provide valuable information to healthcare professionals and public health authorities in managing and preventing outbreaks associated with E. coli O157.

Role of O:157 (Calitativ)

The O:157 (Calitativ) analysis plays a crucial role in detecting the presence of Escherichia coli O157:H7, a strain of pathogenic bacteria responsible for foodborne illnesses. This strain is particularly concerning due to its ability to produce Shiga toxin, which can cause severe gastrointestinal symptoms and potentially lead to life-threatening complications.

Indications for O:157 (Calitativ) Analysis

The O:157 (Calitativ) analysis is recommended in cases where there is a suspicion of foodborne illness or gastrointestinal distress with symptoms such as diarrhea, abdominal cramps, and vomiting. It is particularly important to test for this strain when outbreaks or potential exposure to contaminated food or water sources have been reported. Additionally, this analysis may be ordered as part of routine screening for high-risk populations, such as young children, the elderly, or individuals with compromised immune systems.

Preparation for the Procedure

Preparing for the O:157 (Calitativ) analysis generally does not require extensive measures. However, there are some recommendations to consider:

• Dietary considerations: In most cases, you can provide a sample for the O:157 (Calitativ) analysis regardless of whether you are fasting or have recently eaten. However, in certain situations (e.g., when undergoing comprehensive blood tests), you may need to fast for 8-12 hours before providing the sample.
• Avoid strenuous physical activity: Avoid intense physical exercise on the day before the analysis, as it can potentially affect the test results.
• Abstain from alcohol and smoking: Refrain from consuming alcohol and smoking for at least 24 hours before the analysis, as these activities can influence the test results.
• Maintain proper hydration: Adequate hydration is important to facilitate the sample collection process. Insufficient fluid intake can make it challenging to draw blood.
• Inform your healthcare provider about medications: Some medications can affect the test results. Be sure to inform your healthcare provider about any medications you are taking.

Sample Collection Procedure

The sample for the O:157 (Calitativ) analysis is typically collected through a venipuncture procedure, where blood is drawn from a vein, usually in the arm. The procedure is performed by a trained medical professional and takes only a few minutes. After the venipuncture, you may experience minor bleeding or bruising at the puncture site, which should resolve within a few days.

Sources:

https://www.hopkinsmedicine.org/health/conditions-and-diseases/escherichia-coli-o157-h7
https://www.ncbi.nlm.nih.gov/books/NBK507845/
https://www.health.state.mn.us/diseases/ecoli/ecoli.html

IMPORTANT!

It is crucial to remember that the information provided here is not intended for self-diagnosis or self-treatment. If you experience any symptoms or a flare-up of a condition, it is essential to consult a doctor for proper diagnostic tests and treatment. Only a qualified healthcare professional can accurately diagnose and determine the appropriate treatment. To ensure the most accurate and consistent evaluation of test results, it is recommended to have them performed at the same laboratory. Different laboratories may use various methods and units of measurement for similar tests.