Abstract
Maggot debridement therapy is an alternative method for treating of infected wounds in both human and veterinary medicine. Sterile larvae, such as from Lucilia cuprina (Diptera: Calliphoridae), stimulate wound healing through debridement of necrotic tissue and disinfection. Hence, we evaluated the antimicrobial activity from bacteria-pretreated L. cuprina maggot extracts against the most commonly isolated Gram-positive and Gram-negative bacteria from wounds. In short, whole-body extracts were collected after the sterile larvae were incubated for 24 h with a bacterial suspension of Staphylococcus aureus (Bacillales: Staphylococcaceae), Pseudomonas aeruginosa (Pseudomonadales: Pseudomonadaceae) or Methicillin-resistant S. aureus (MRSA). Larvae were cut into multiple pieces in a microtube containing sterile phosphate-buffered saline (PBS), centrifuged, and the supernatant was filtered and used to test antibacterial activities. A Colony-Forming Unit assay was performed at two incubation times (0 and 6 h) with pre-treated and non-treated (PBS) larval extracts groups, compared to a bacteria growth control group. The results showed effective activity against P. aeruginosa, a slight decrease in bacteria growth for S. aureus, and no significant differences for MRSA. With higher antibacterial activity for P. aeruginosa, L. cuprina may represent a powerful tool to the clinical approach of gram-negative wound healing.
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The authors are grateful to the Laboratório de Bacteriologia (LABAC) and for the financial support of the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by JBD, TRRL, ARV, AFIMM. The first draft of the manuscript was written by JBD, and all authors critically revised all versions of the manuscript. Resources and supervision were provided by SGM and JFC.
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Dillmann, J.B., Lopes, T.R.R., de Vasconcelos, A.R. et al. In vitro antibacterial activity of whole body extracts from bacteria-pretreated Lucilia cuprina maggots. Int J Trop Insect Sci 44, 71–77 (2024). https://doi.org/10.1007/s42690-023-01136-x
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DOI: https://doi.org/10.1007/s42690-023-01136-x