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[Houseflies (M. domestica L.) as transmitters of the agent of cholera]
Abstract:
The authors present the experimental results of study of the role played by domestic flies in the spread of cholera causative agents. It was found that cholera microbes survived on the external surface of flies for 5 to 7 days, and in the insect organism--in the course of their whole life. Cholera vibrios underwent no sharp changes in the organism of flies. By means of individual infection method and keeping of flies excluding a possibility. By means of individual infection method and keeping of flies excluding a possibility of repeated autoinfection it was revealed that cholera vibrios could multiply in the organism of domestic flies. The infected insects can discharge cholera vibrios for a long time into the external environment and contaminate food.
Insights
Domestic flies play a significant role in spreading cholera. These insects can carry cholera bacteria externally for days and internally for their lifetime, potentially contaminating food supplies.
Area of Science:
- Microbiology
- Public Health
- Entomology
Background:
- Cholera remains a significant global health concern, necessitating understanding of its transmission vectors.
- Domestic flies are ubiquitous insects often found in environments associated with poor sanitation and disease outbreaks.
Purpose of the Study:
- To investigate the role of domestic flies in the transmission of cholera causative agents.
- To determine the survival and multiplication capabilities of cholera vibrios within the domestic fly.
- To assess the potential for flies to act as long-term carriers and disseminators of cholera.
Main Methods:
- Experimental infection of domestic flies with cholera vibrios.
- Monitoring survival rates of cholera vibrios on the external surface and within the insect organism.
- Utilizing individual infection methods to exclude autoinfection and assess multiplication.
- Observing the discharge of viable cholera vibrios by infected flies over time.
Main Results:
- Cholera bacteria survived on the external surface of flies for 5–7 days.
- Cholera vibrios remained viable within the fly's organism for its entire lifespan.
- Cholera vibrios did not undergo significant alterations within the fly.
- Evidence suggests cholera vibrios can multiply within the domestic fly's organism.
- Infected flies continuously discharged cholera vibrios into the environment, posing a contamination risk.
Conclusions:
- Domestic flies are effective vectors for cholera transmission.
- Flies can serve as both short-term (external) and long-term (internal) carriers of cholera bacteria.
- The multiplication of cholera vibrios within flies enhances their role as disseminators, leading to potential food contamination.