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Updated: May 22, 2026

Microbiological Rapid On-Site Evaluation for Pulmonary Infectious Diseases
Published on: March 1, 2024
A successful diagnostic case of Pneumocystis pneumonia by the loop-mediated isothermal amplification method in a
Nobuhiro Asai1, Masahiro Aoshima, Yoshihiro Ohkuni
1Department of Pulmonology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba 296-8602, Japan. nobuhiro0204@hotmail.com
Abstract:
Pneumocystis pneumonia (PCP) can occur in patients with many causes of the immunocompromised state other than human immunodeficiency virus (HIV). It is quite difficult to diagnose PCP without HIV because there is no method for detecting Pneumocystis jirovecii. Thus, non-HIV PCP continues to have high mortality. Recently, loop-mediated isothermal amplification (LAMP) is becoming an established nucleic acid amplification method offering rapid, accurate, and cost-effective diagnosis of infectious diseases. We report a non-HIV PCP case successfully diagnosed by the LAMP method. It was previously reported that PCR in BALF specimens had been the most sensitive method in the diagnosis of PCP without HIV. The LAMP method would be more sensitive than conventional PCR and an effective tool in the early diagnosis of PCP.
Insights
Diagnosing Pneumocystis pneumonia (PCP) in non-human immunodeficiency virus (HIV) patients is challenging. A new loop-mediated isothermal amplification (LAMP) method shows promise for early and accurate detection of this serious infection.
Area of Science:
- Medical Diagnostics
- Infectious Diseases
- Molecular Biology
Background:
- Pneumocystis pneumonia (PCP) can affect immunocompromised patients regardless of HIV status.
- Diagnosing non-HIV PCP is difficult due to the lack of reliable methods for detecting Pneumocystis jirovecii.
- Non-HIV PCP is associated with high mortality rates.
Observation:
- A case of non-HIV PCP was successfully diagnosed using the loop-mediated isothermal amplification (LAMP) method.
- Previous studies indicated Polymerase Chain Reaction (PCR) in bronchoalveolar lavage fluid (BALF) as the most sensitive diagnostic approach for non-HIV PCP.
- The LAMP method offers a potentially more sensitive alternative to conventional PCR.
Findings:
- The LAMP method enabled the successful diagnosis of a non-HIV PCP case.
- LAMP is a rapid, accurate, and cost-effective nucleic acid amplification technique.
- This diagnostic approach may surpass the sensitivity of traditional PCR methods.
Implications:
- The LAMP method could significantly improve early diagnosis of PCP in non-HIV immunocompromised individuals.
- Wider adoption of LAMP may lead to reduced mortality associated with non-HIV PCP.
- This advancement offers a valuable tool for managing infectious diseases in vulnerable patient populations.
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