Related Experiment Video
Updated: Jul 3, 2026
07:18
An Electroporation Method to Transform Rickettsia spp. with a Fluorescent Protein-Expressing Shuttle Vector in Tick Cell Lines
Published on: October 11, 2022
Diagnostic challenges in re-emerging rickettsioses: why current tools fall short.
Yaawar Bashir Mir1, Tasaduq Manzoor1, Danish Mushtaq1
1Division of Animal Biotechnology, Faculty of Veterinary Sciences & Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India.
Clinical Microbiology Reviews
|July 2, 2026
Summary
Rickettsial diseases are a growing global threat, often misdiagnosed. Advanced molecular diagnostics like multiplex PCR and emerging point-of-care systems offer earlier, more accurate detection for better treatment outcomes.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Public Health
Background:
- Rickettsial diseases (scrub typhus, spotted fevers, typhus) pose a significant, increasing global health risk, especially in Asia-Pacific and Africa.
- Underdiagnosis is common due to nonspecific symptoms overlapping with other febrile illnesses, leading to delayed treatment and potential fatality.
- Conventional diagnostics like Weil-Felix lack specificity, and the gold standard indirect immunofluorescence assay (IFA) is retrospective due to delayed seroconversion.
Purpose of the Study:
- To review the evolving diagnostic landscape for rickettsial diseases.
- To highlight limitations of conventional methods and the advantages of molecular diagnostics.
- To explore emerging technologies and strategies for improved rickettsial disease diagnosis and surveillance.
Main Methods:
- Literature review of diagnostic methods for rickettsial diseases.
- Evaluation of conventional serological and molecular diagnostic techniques.
- Assessment of emerging technologies including multiplex PCR, syndromic panels (TAC), digital PCR (dPCR), and CRISPR-Cas-based systems (SHERLOCK, DETECTR).
Main Results:
- Molecular diagnostics, especially multiplex PCR (mPCR), enable early, species-specific detection in the acute phase.
- Syndromic panels (e.g., TaqMan Array Card) allow simultaneous screening for multiple pathogens.
- Emerging platforms like dPCR and CRISPR-Cas systems offer potential for rapid, low-resource diagnostics.
- Integration with One Health and AI is crucial for proactive surveillance and overcoming implementation barriers.
Conclusions:
- Molecular diagnostics represent a significant advancement over conventional methods for rickettsial diseases.
- Emerging point-of-care technologies hold promise for improving diagnosis in resource-limited settings.
- Proactive diagnostic strategies, supported by molecular surveillance and AI, are essential to reduce the global burden of these neglected zoonotic infections.
Keywords:
CRISPR–Cas diagnosticsOne HealthOrientia tsutsugamushiRickettsiaacute undifferentiated febrile illnessdigital PCRmultiplex PCRMore Related Videos
Related Concept Videos
01:26Rocky Mountain Spotted Fever
Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
01:25Rapid Identification of Pathogens
MALDI-TOF MS has transformed clinical microbiology by offering a rapid and reliable method for pathogen identification. The traditional approach to microbial identification typically involves time-consuming culture techniques and biochemical tests, which can delay the initiation of appropriate antimicrobial therapy. MALDI-TOF MS avoids these delays by using characteristic ribosomal protein mass patterns of microbial cells, enabling accurate species-level identification within minutes.Principle...