Question

One of the test to detect microbial enterotoxins is _____.

• A. Rapid Photo Latex Arrangement Test
• B. Reversed Passive Latex Agglutition Test
• C. Random Photo Light Agglutition Test
• D. Real Passive Light Agglutition Test

Hint:

RPLA is widely used to detect:
- Staphylococcal enterotoxins (A, B, C, D)
- Bacillus cereus diarrheal enterotoxins
- Clostridium perfringens enterotoxins

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Microbial enterotoxins, such as those produced by Staphylococcus aureus or Bacillus cereus, are major causes of foodborne poisoning.
Detecting these toxins directly in food matrices is critical because the viable bacteria themselves may no longer be present after processing.

Step 2: Detailed Explation:
Reversed Passive Latex Agglutition (RPLA) is an immunological method used to detect and semi-quantify soluble bacterial enterotoxins.
In a standard agglutition test, antibodies are bound to antigen particles.
In a "reversed" passive test, the latex particles are coated with specific antibodies against the target enterotoxin.
When a sample containing the enterotoxin is mixed with these sensitized latex particles, the toxin molecules bind to the antibodies, causing cross-linking.
This results in visible agglutition (clumping) of the latex particles.
This method is simple, highly specific, and does not require advanced instrumentation, making it a valuable tool in food microbiology.

Step 3: Fil Answer:
The correct option is (B).