Yan Wahast Islabão

Mr. Yan Wahast Islabão

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Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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9 May 2025 in Microbiology Research
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Journal Article
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AMAlexia Brauner de Mello
Alexia Brauner de Mello
JFJuliana Montelli Fenalti
Juliana Montelli Fenalti
BBBruna Baccega
Bruna Baccega
YIYan Wahast Islabão
Yan Wahast Islabão
FMFilipe Obelar Martins
Filipe Obelar Martins
COCamila Belmonte Oliveira
Camila Belmonte Oliveira
The increasing resistance of Trichomonas vaginalis to the only approved chemical family of drugs for treatment, the 5-nitroimidazoles, has prompted the exploration of new therapeutic agents against this prevalent non-viral sexually transmitted infection. Natural products have emerged as a significant source of novel treatments for trichomoniasis. The aim of this study was to evaluate the anti-T. vaginalis activity of citral (3,7-dimethyl-2,6-octadienal), the main constituent of the essential oil of Cymbopogon species, commonly known as lemongrass. Our findings indicate that citral exhibits a minimum inhibitory concentration (MIC) of 100 μM, effectively inhibiting the growth of T. vaginalis trophozoites within 12 h of exposure, and a 50% inhibitory concentration (IC50) of approximately 40 μM after 24 h. Furthermore, the evaluation of nitric oxide (NO) levels suggests that citral possesses antioxidant properties. Molecular docking studies reveal a weak interaction with three parasite proteins: thioredoxin reductase (TvTrxR), purine nucleoside phosphorylase (TvPNP), and methionine gamma lyase (TvMGL). The present study highlights the potential of citral as a candidate for the development of no-nitroimidazole drugs, offering new avenues for trichomoniasis treatment and underscoring the importance of further investigation into citral’s mechanism of action.

12 June 2025 in Journal of Medical Entomology
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Journal Article
Closed access
EREduarda Saldanha Rieffel
Eduarda Saldanha Rieffel
TJThais Fernanda de Jesus
Thais Fernanda de Jesus
FFFabiane de Holleben Camozzato Fadrique
Fabiane de Holleben Camozzato Fadrique
ASAmanda Andersson Pereira Stark
Amanda Andersson Pereira Stark
COCamila Belmonte Oliveira
Camila Belmonte Oliveira
RFRaqueli Teresinha França
Raqueli Teresinha França
Tadarida brasiliensis is an insectivorous bat of the family Molossidae, occurring in Brazil, primarily in the southern and southeastern regions, forming colonies in rural and urban environments. In this study, we report for the first time the parasitism of the mite Notoedres sp. in T. brasiliensis in the country. Clinical examination revealed disseminated crusty papular lesions, concentrated on the face, forelimbs, hindlimbs, perianal region, and uropatagium. Histological examination showed hyperplasia of the stratum corneum with parasitic structures compatible with mites. This study highlights the importance of ectoparasite infestations in bats for the health and conservation of this species in the Pampa biome.

18 December 2023 in Semina: Ciências Agrárias
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Journal Article
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MRMelânia Lazzari Rigo
Melânia Lazzari Rigo
KMKauê Rodriguez Martins
Kauê Rodriguez Martins
YIYan Wahast Islabão
Yan Wahast Islabão
AMAlexia Brauner de Mello
Alexia Brauner de Mello
MGMarjorie de Giacometi
Marjorie de Giacometi
COCamila Belmonte Oliveira
Camila Belmonte Oliveira
A Tristeza Parasitária Bovina (TPB) e a tripanossomose bovina são enfermidades que impactam a produção bovina de forma negativa no Brasil, causando perdas na produção e morte dos animais. Neste estudo, o objetivo foi investigar os quatro hemoparasitos que mais acometem o rebanho bovino (A. marginale, B. bovis, B. bigemina e T. vivax) pela técnica de qPCR, em vacas leiteiras de descarte na região noroeste do Rio Grande do Sul. Para isso, foram coletados, em abatedouro, fragmentos de cérebro e de baço de 64 bovinos leiteiros dessa região. A extração do DNA das amostras foi feita por meio do reagente Brazol®, e a quantidade e a pureza das mesmas, foi obtida através da análise de espectrofotômetro com NanoDropTM. Nas amostras de cérebro foi realizada a detecção de DNA para T. vivax e B. bovis, enquanto que no baço, investigou-se DNA dos quatro agentes. Das 64 amostras de cérebro analisadas, 14,06 % foram positivas para Babesia bovis. Nas amostras de baço, Babesia bovis foi detectada em 17,19 %, enquanto que 29,69 % testaram positivas para B. bigemina e, 37,50 %, para Anaplasma marginale. Em relação ao Trypanosoma vivax, nenhuma resultou positiva em ambos os tecidos. Assim, os achados evidenciaram que B. bovis, B. bigemina e A. marginale estão presentes no rebanho bovino leiteiro, tendo maior percentual de A. marginale na região investigada; por outro lado, T. vivax não foi diagnosticado no presente estudo.