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Express Delivery
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Same day Delivery in (Saudi Arabia, Qatar, UAE, Kuwait)
|
2 business days (Oman, Bahrain)
|
2-3 business days (All other countries)
|
|
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Understanding the Rivalta Test for FIP Screening
The Rivalta test is most commonly used in cats to evaluate effusion (abdominal or pleural fluid). You mix distilled water (8 mls) with a drop of acetic acid or vinegar (10 drops), then gently add a drop of the effusion.
Sensitivity: 91.3% | Specificity: 65.5%
Positive Test
The drop keeps its shape, or looks like a jellyfish/cloud.
Suggests: A high protein, inflammatory effusion (classically seen with FIP).
Negative Test
The drop disperses and disappears into the solution.
Suggests: More consistent with a transudate or non-inflammatory fluid.
Why It Matters
It’s not a definitive test, but it’s a helpful screening tool when you’re building your case. A positive Rivalta increases suspicion for FIP, especially when paired with signalment, clinical signs, and other diagnostics.