Table 1.
Samples for technical validation of RLEP qPCR and 16S rRNA RT qPCR
Purpose | Sample type (No.) | Obtained from | Origin |
---|---|---|---|
“Must detect RLEP/16S rRNA (DNA)” samples | Nasal swab sample (4)a | 2 sequencing confirmed MB leprosy patients | Togo |
PCR standard (1 per RLEP and 16S rRNA qPCR) | Cloned RLEP/16S rRNA plasmids with known copy numbers | GenExpress, Berlin, Germany | |
“Must not detect RLEP/16S rRNA (DNA)” samples | Nasal swab sample (14)a | 7 endemic controls (healthy individuals) | Togo |
Nasal swab sample (10)a | 5 occupational contacts to untreated (MB) leprosy patients | Munich, DITMb medical staff | |
Nasal swab sample (6)a | 3 non-exposed healthy controls | Munich, DITMb laboratory staff | |
Swab sample (5)a | 5 PCR confirmed Buruli ulcer patients | Ghana [24] | |
Fine needle aspirate (12)a | 11 PCR confirmed Buruli ulcer patients | Ghana [24] | |
Swab sample (1)a | 3 Patients with PCR confirmed cutaneaous leishmaniasis | Munich, accredited diagnostic laboratories of DITMb | |
Punch biopsy sample (2)a | |||
Mycobacterial culture (13)a | M. abscessus, M. africanum, M. avium, M. bovis, M. fortuitum, M. gordonae, M. intracellulare, M. kansasii, M. malmoense, M. marinum, M. microti, M. tuberculosis, M. xenopi | National Reference Center for Mycobacteria, Borstel, Germany | |
Bacterial culture (5)a | Microbial flora colonizing human skin or nasal mucosa: Propionibacterium acnes, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pyogenes and Escherichia coli | Max von Pettenkofer-Institute, Ludwig-Maximilians-University, Munich, Germany |
a DNA extracts (additional file – protocol 1)
b DITM, Department of Infectious Diseases and Tropical Medicine (accredited according to DIN EN ISO 15189)