A Thrassis bacci johnsoni flea 41 days after infection with P. pestis. Thrassis bacci is one of the primary vectors of plague to humans. Yersinia pestis is the bacterium that causes bubonic plague (the black death of the middle ages),primarily a flea-carried pathogen of rats. Infection is rapid,causing swelling in the lymph nodes and leading to septicemia and pulmonary infection. Extensive control measures,directed against the rats as well as their fleas,have essentially banished the plague from Europe but there are still many regions of the world where the disease occurs | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Science Source |
Bildgröße: | 2969 px × 2025 px |
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Eigentums-Rechte: | nicht erforderlich |
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