How can I test for Opisthorchis viverrini and Opisthorchis felineus?

Do you want to check that you have opisthorchiasis? If you do not have contraindications, such as gallstones, the most informative analysis is probing and examining the contents of bile. All other tests and symptoms cannot unequivocally indicate the presence of the disease. The presence of parasite eggs in the bile is an unequivocal sign of the disease, which has a high diagnostic accuracy. At the same time, keep in mind that the masonry of opisthorchis is about once every 10 days (data not confirmed), if you donated bile, and the analysis is negative, you should take the analysis again. At the same time, if you are taking choleretic drugs, then bile with eggs can also be excreted from the body faster, which increases the false negative result.

Direct Diagnostics

  • Bile analysis (70% informative)
  • Blood test (20% informative, useful only in the first 6 months after the initial infection)
  • Fecal analysis - only the PCR method works, the rest are ineffective
  • MRI / CT - in some cases helps
  • Ultrasound - only helps to diagnose the absence or presence of stones

Indirect signs

  • Pain in the right rib (in many patients, up to 70%)
  • Skin allergic reactions (in most patients, up to 60%)
  • Weakness (most patients, up to 60%)
  • Sleep disturbance (in many patients, up to 60%)
  • Other parasites, eg. Giardia (in many, up to 50%)
  • Less common, but also an indirect sign: SIBO, liver disease, sore throat, decreased performance, increased sweating)

Important: Do not confuse cause and effect! statistics is a delicate and paradoxical matter. 1. if parasite eggs were found in your bile, then with a 100% probability you have opisthorchiasis, but if you did not find parasite eggs in your bile, then you should be tested up to two more times to make sure that the analysis was not false negative. 2. If you have opisthorchiasis, then with a 60% chance you must have a skin allergy, but if you have a skin allergy, then the probability that you have opisthorchiasis is 1 in 100, because there are many other diseases with skin allergies.