Banca de DEFESA: TAIANE NUNES MAGALHÃES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : TAIANE NUNES MAGALHÃES
DATE: 28/02/2025
TIME: 14:00
LOCAL: Virtual - meet.google.com/wyz-gwcj-qrw
TITLE:

Assessment of Health Risks Associated with the Consumption of Oreochromis niloticus From Urban Streams of Porto Velho/RO

KEY WORDS:

Parasite-host-environment; Zoonoses; One Health and; Water resource

PAGES: 95
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUMMARY:

The concept of One Health has gained prominence in recent years, especially after the COVID-19 pandemic. This concept emphasizes prevention and sustainability, linking human, animal, and environmental health. In this context, methodologies to assess animal and environmental health become necessary. The parasite-host-environment relationship highlights the importance of ecological balance and its implications for Public Health. Parasites are evolutionarily successful organisms, actively integrating ecological interrelationships and playing fundamental roles in ecosystems. Therefore, their significance should be recognized by public authorities and environmental managers when implementing methods for the restoration and conservation of water resources. Another analysis to consider is gill histology as an environmental biomarker for ecosystem quality assessments. The objective of this study was to evaluate the risks associated with consuming fish from urban streams in the city of Porto Velho/RO, considering the presence of endoparasites with zoonotic potential. Through a systematic review using the PRISMA method, gaps were identified regarding the occurrence and prevalence of endoparasites in Oreochromis niloticus, as well as studies on ectoparasitism, most of which focused predominantly on the South and Northeast of Brazil. The lack of detailed investigations and specific methodologies for identifying endoparasites limits the understanding of zoonosis-related risks associated with consuming these fish. To address this gap, forty specimens of O. niloticus were collected from four urban streams in Porto Velho/RO. Necropsies were performed on the fish, and their intestines were collected for coproparasitological examination. The somatic musculature was analyzed under a stereomicroscope for parasite larvae, which were not observed. Conversely, a high incidence of eggs and larvae of enteroparasites common in humans and other mammals, such as Ascaris lumbricoides, Hymenolepis nana, Ancylostoma sp., Taenia sp., among others, indicated contamination of the water bodies by sewage discharge. The absence of parasites in the fish musculature may initially appear positive. However, the combination of the lack of common parasites in the musculature and the high infestation of eggs in the intestines reflects stream anthropization and inadequate sanitation, posing a significant risk to Public Health. This anthropization is corroborated by the gill analysis, where results showed a predominance of stage I and stage II adaptive alterations. These lesions are typical responses of fish exposed to pollution and reflect the organism’s efforts to minimize tissue damage. This scenario of environmental degradation and biodiversity loss is evidenced by the total absence of parasite larvae in the somatic muscle of the fish, the presence of parasite eggs common in humans in the intestinal lumen of these fish, and adaptive stage gill alterations. It is concluded that the analyzed fish not only highlight the critical state of urban streams but also serve as important bioindicators of the region's environmental and sanitary quality.

COMMITTEE MEMBERS:
Presidente - 2282442 - CAROLINA RODRIGUES DA COSTA DORIA
Interno - 1427035 - WILSON GOMEZ MANRIQUE
Externo ao Programa - 008.841.272-57 - JERONIMO VIEIRA DANTAS FILHO