Real lab failures, root causes, and fixes — curated and bilingually annotated by our team.
Recurring fungal contamination in cultures after incubation. Multiple cultures affected over time. Visible mold growth may appear on incubator surfaces. Persistent contamination despite replacing affected cultures.
Multiple cultures becoming contaminated simultaneously or in sequence. Contamination spreading despite apparently good technique. Cross-contamination between neighboring cultures.
Poor cell growth, cell death, or altered cell behavior without visible microbial contamination. May include effects from free radicals, metal ions, disinfectant/detergent residues, or endotoxins persisting after bacterial contamination is cleared.
Unexplained cell detachment, poor cell health, or cell death. Non-cytopathic viruses may show no obvious signs. Cannot be detected by conventional light microscopy. May not present significant effects if virus is host/tissue-restricted.
Visible turbidity and color change of medium. Fungal structures visible under standard light microscopy. Rapid onset similar to bacterial contamination. May include visible mold growth.
Slowed cell growth, altered cellular metabolism, chromosomal aberrations, and interference with cell attachment. No visible turbidity in medium. Difficult to detect by light microscopy due to small size (0.15-0.3 µm).
Rapid-onset turbidity and color change of culture medium (when phenol red is present). Medium becomes cloudy and pH indicator changes color quickly.
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