Related Experiment Video
Updated: Mar 30, 2026
Application of CRISPR Interference CRISPRi for Gene Silencing in Pathogenic Species of Leptospira
Published on: August 14, 2021
Synanthropic Cockroaches (Blattidae: Periplaneta spp.) Harbor Pathogenic Leptospira in Colombia
Viviana Gonzalez-Astudillo1, Javier A Bustamante-Rengifo2, Álvaro Bonilla3
1University of Queensland, Gatton, Queensland, Australia (v.gonzalez@uq.edu.au), v.gonzalez@uq.edu.au.
Abstract:
Leptospirosis cases in Colombia are typically linked to peridomestic rodents; however, empirical data suggest that Leptospira-infected patients with no apparent exposure to these reservoirs are common. Cockroaches (Periplaneta spp.) have equal or greater interaction with humans than rodents, yet their potential role as carriers of Leptospira has not been assessed. We determined if pathogenic Leptospira is harbored by Periplaneta spp. in Cali (Colombia) and the variables influencing this relationship. Fifty-nine cockroaches were captured from seven sites and DNA was extracted from the body surface and digestive tract for a multiplex polymerase chain reaction, targeting genes secY and flaB. Logistic regression models and proportion tests showed a higher likelihood for Leptospira to be isolated from body surfaces (P > 0.001) and from individuals inside houses (six times more likely). These findings are the first to demonstrate an association between Periplaneta spp. and Leptospira, suggesting the need to investigate the potential for cockroaches to serve as reservoirs or transport hosts for Leptospira.
Insights
Cockroaches may carry Leptospira bacteria, a potential source of infection in humans. This study found Leptospira on cockroach body surfaces, especially in homes, suggesting a new public health concern.
Area of Science:
- Veterinary Medicine
- Infectious Diseases
- Public Health
Background:
- Leptospirosis cases in Colombia are often linked to rodents.
- However, many patients lack clear exposure to rodent reservoirs.
- Cockroaches (Periplaneta spp.) have significant human interaction but their role in Leptospira transmission is unknown.
Purpose of the Study:
- To determine if pathogenic Leptospira bacteria are harbored by Periplaneta spp. cockroaches in Cali, Colombia.
- To identify factors influencing the presence of Leptospira in cockroaches.
Main Methods:
- Fifty-nine cockroaches were collected from seven sites in Cali.
- DNA was extracted from cockroach body surfaces and digestive tracts.
- Multiplex polymerase chain reaction (PCR) targeting secY and flaB genes was used to detect Leptospira.
Main Results:
- Pathogenic Leptospira was detected in Periplaneta spp. cockroaches.
- Leptospira was more frequently isolated from cockroach body surfaces than digestive tracts (P > 0.001).
- Cockroaches found inside homes were six times more likely to harbor Leptospira.
Conclusions:
- This is the first study demonstrating an association between Periplaneta spp. cockroaches and Leptospira.
- Cockroaches may act as reservoirs or transport hosts for Leptospira.
- Further investigation is needed to understand the public health implications of cockroaches in Leptospira transmission.
More Related Videos
12:21The Madagascar Hissing Cockroach as an Alternative Non-mammalian Animal Model to Investigate Virulence, Pathogenesis, and Drug Efficacy
Published on: November 24, 2017
06:05Author Spotlight: Leptospira DNA Detection in Water for Environmental Analysis and Disease Surveillance
Published on: June 14, 2024
Related Concept Videos
01:30Bacterial Phylum Spirochaetes
01:30Reservoir of Infection