Fleas and Their Medical Implications – Morphological Aspects and Practical Study
Fleas and Their Medical Implications – Morphological Aspects and Practical Study
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DOI: https://doi.org/10.22533/at.ed.578132608054
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Palavras-chave: Siphonaptera, Doenças transmitidas por pulgas, Hematofagia
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Keywords: Siphonaptera, Doenças transmitidas por pulgas, Hematofagia
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Abstract: This chapter presents an organized overview of fleas (order Siphonaptera), hematophagous ectoparasites that primarily infest birds and mammals (Rust & Dryden, 1997; Silverman & Appel, 1994). The etymology of “Siphonaptera” reflects key morphological traits: “Siphon” denotes the tube-like piercing-sucking mouthparts, and “Aptera” indicates winglessness throughout their life cycle, despite their likely descent from winged insects, possibly Mecoptera (Lewis, 1998; Marshall, 1981). Flea mouthparts inject anticoagulant saliva, allowing continuous blood feeding; a single flea can ingest up to 15 times its body weight per day (Bitam et al., 2010; Silverman & Appel, 1994). Fleas are globally distributed and highly adaptable to diverse environments, including human dwellings and animal shelters (Rust, 2005). They prefer warm, humid climates, with infestations peaking in poorly ventilated areas during hot months (Rust, 2005; Silverman & Appel, 1994). Notably, only 5% of fleas are adults on hosts, while 95% reside in the surrounding environment (Rust & Dryden, 1997). This chapter addresses their biology, behavior, and life cycle, including feeding, reproduction, and activity patterns, as well as their role in human and animal health (Bitam et al., 2010; Rust, 2005). Fleas act as vectors of multiple diseases, such as plague (Yersinia pestis), murine typhus (Rickettsia typhi), tungiasis, certain cestode infections, and bartonellosis (Bitam et al., 2010; Lewis, 1998; Rust, 2005). Infestations can also cause allergic dermatitis (flea bite dermatitis) and secondary infections. The chapter includes practical laboratory images from the Federal University of Minas Gerais to aid in species identification and promote hands-on learning. Emphasis is placed on understanding Siphonaptera in epidemiological, clinical, and public health contexts, fostering critical thinking and preparedness for disease control strategies.
- Ana Carolina Oliveira Sinzato
- Letícia Sissio Rodrigues
- Beatriz Tiemi Kitamura Okada
- Andressa Campos de Sousa
- Adalberto Alves Pereira Filho