Research Topic: molecular diagnostics

Multicenter performance evaluation of the “quanty TOXO (RH region)” kit (Clonit) for molecular diagnosis of toxoplasmosis

Researchers from seven French hospitals tested a commercial DNA test kit called “quanty TOXO” that detects Toxoplasma gondii, a parasite causing serious infections in pregnant women and people with weakened immune systems. The kit performed well overall, correctly identifying infection in nearly 95% of positive cases and showing no false positives. However, the test sometimes missed infections when parasite levels were very low, suggesting doctors should run tests twice to increase detection chances.

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First report of Stemphylium lycopersici keratitis, a complex corneal infection case

A 66-year-old man developed a severe corneal infection from a stone chip injury that didn’t improve with standard antibiotics. Doctors discovered the infection was caused by a rare plant fungus called Stemphylium lycopersici, combined with a herpes virus. Using advanced genetic testing (mNGS) to identify the exact pathogens, they prescribed targeted antifungal and antiviral medications along with a corneal transplant, successfully healing the infection and preserving his vision.

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High-Resolution Melting assays development for discrimination of fungal pathogens causing Grapevine Trunk Diseases

Researchers developed quick and affordable DNA tests to identify fungal diseases in grapevines before they show visible symptoms. Using a technique called High-Resolution Melting, the tests can detect ten different disease-causing fungi that damage grape plants. These early detection tools help vineyard owners treat infected plants faster and save money on crop losses.

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Nosocomial Diarrhea Distribution by Cryptosporidium in Isfahan

Researchers tested 217 patients who developed diarrhea in a hospital in Isfahan, Iran to see if a parasite called Cryptosporidium was responsible. Using advanced DNA testing, they found the parasite in only 2 out of 217 patients (less than 1%). This suggests that while this parasite can spread in hospitals, it is not a major cause of diarrhea in this particular hospital, which likely has good hygiene practices.

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Controlled inoculation provides insight into western redcedar resistance to multiple root- and butt-rot pathogens

Western redcedar is an economically important tree species suffering from fungal diseases that cause wood decay and significant financial losses. Researchers developed controlled methods to test how resistant young redcedar trees are to eight different decay fungi, finding that some fungi are much more damaging than others. Importantly, they discovered that some infections remain hidden without visible symptoms but still harm tree growth, and these hidden infections can be detected using advanced DNA-based methods. This research will help forest managers and breeders develop redcedar varieties with better disease resistance.

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Primary cutaneous mixed infection with Cryptococcus uniguttulatus and Mycobacterium tuberculosis

A 43-year-old man had a persistent facial rash that didn’t improve with standard antifungal treatments. Doctors initially found a fungal infection called Cryptococcus uniguttulatus using culture tests. However, advanced molecular testing (DNA sequencing) revealed he also had a tuberculosis infection in the same skin lesion. Once both infections were treated with appropriate medications, the patient’s rash finally improved. This case shows that sometimes people can have multiple infections at the same location and that newer diagnostic methods are important for finding these hidden infections.

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Diagnostic Approaches to Invasive Candidiasis: Challenges and New Perspectives

Invasive candidiasis is a dangerous fungal infection affecting critically ill hospital patients. Current testing methods like blood cultures are slow and unreliable, so doctors are developing faster tests using DNA detection and biomarkers. A combination of new diagnostic tools and prompt treatment with antifungal medications is essential to improve survival rates and reduce complications from this serious infection.

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