Ana Laura Carbajal-de-la-Fuente, Romina V Piccinali, Ximena Porcasi, Gerardo Aníbal Marti, Antonieta Rojas de Arias, Luciana Abrahan, Florencia Cano Suárez, Patricia Lobbia, Gabriela Medina, Yael Provecho, Mirko Rojas Cortez, Nicolás Soria, Teresa C Gonçalves, Julieta Nattero
Chagas disease is caused by the protozoan parasite Trypanosoma cruzi (Chagas, 1909). One of the primary vectors of T. cruzi in South America is Triatoma infestans (Klug, 1834). This triatomine species is distributed across a huge latitudinal gradient, inhabiting domiciliary , peridomiciliary , and wild environments. Its wide geographic distribution provides an excellent opportunity to study the relationships between environmental gradients and intraspecific morphological variation. In this study, we investigated variations in wing size and shape in T...
May 10, 2024: Acta Tropica
Mackenzie L Kwak, Alan T Hitch, Dolyce H W Low, Sophie A Borthwick, Greg Markowsky, Daniel McInnes, Gavin J D Smith, Ryo Nakao, Ian H Mendenhall
Bats and ticks are important sources of zoonotic pathogens. Therefore, understanding the diversity, distribution, and ecology of both groups is crucial for public health preparedness. Soft ticks (Argasidae) are a major group of ectoparasites commonly associated with bats. The multi-host life cycle of many argasids make them important vectors of pathogens. Over nine years (2011-2020), surveillance was undertaken to identify the ticks associated with common bats in Singapore. During this period, the bat tick Ornithodoros batuensis was detected within populations of two cave roosting bat species: Eonycteris spelaea and Penthetor lucasi...
May 9, 2024: Acta Tropica
Xiang Li, Peng Liao, Wenjing Zhou, Xinqi Yang, Bin Ye
Fatty acid binding proteins (FABPs) have emerged as attractive vaccination candidates for several platyhelminth species. To explore the physiological functions of Echinococcus multilocularis (E. multilocularis) FABP, the molecular characteristics of EmFABP1 were analyzed by online software, and the regulatory roles of rEmFABP1 protein in murine macrophages were further investigated. The emfabp1 gene encodes 133 amino acids with the characteristic β-barrel shape of the cytoplasmic FABP family. Natural EmFABP1 protein is predominantly expressed in protoscoleces tegument and germinal layer cells and is also detected in cyst fluid and exosomes of E...
May 8, 2024: Acta Tropica
Humphrey D Mazigo, Neema Kayange, Emmanuela E Ambrose, Maria M Zinga, Stella Mugassa, Deodatus Ruganuza, Upendo J Mwingira, Cecilia Uisso, Francesca Mutapi
The World Health Organization calls for schistosomiasis endemic countries to regularly monitor the efficacy of Praziquantel (PZQ) drug, the only antischistosomal drug used for four decades in Tanzania. In response to that call, the current study investigated the efficacy of single dose of PZQ against Schistosoma haematobium during the high transmission season and further assessed, the sensitivity and specificity of urine reagent strips before and after treatment. The study recruited a total of 2,498 -children aged (4 -17 years old) who provided a single urine sample that was visually examined for macro-haematuria, then using urine dipstick and urine filtration technique for microhaematuria and the presence of S...
May 8, 2024: Acta Tropica
Mei-De Liu, Heng-Duan Zhang, Yi Huang, Jing-Xia Cheng, Chun-Xiao Li, Tong-Yan Zhao
Japanese encephalitis (JE) is a mosquito-borne disease with a spatial distribution that is linked to geo-environmental factors. The spatial distribution of JE cases and correlated geo-environmental factors were investigated in two critical counties in southern and northern China. Based on maps, enhanced thematic mapper (ETM) remote sensing datasets from Landsat and spatial datasets of JE cases, spatial distribution and spatial cluster analyses of JE cases at the village scale were performed by using the standard deviational ellipse and Ripleys K-function...
May 8, 2024: Acta Tropica
Mathew Salomi Sheetal, Archana Chandran, Abdulkhaderkunju Janus, Ollukkara Krishnan Sindhu, Deepa Padinjare Melepat, Vijayakumar Kaithathara, Ramachandran Latha Rathish
The surge in domestic cat adoption across India, particularly the rising preference for high-pedigree cats, coupled with environmental factors, has resulted in increased incidence of dermatophytosis among feline companions. Despite this growing concern, there is a noticeable scarcity of studies in India delving into the etiological factors contributing to dermatophytosis in cats. This disease is a threat to animal health and carries public health significance, given that cats are recognized reservoir hosts for Microsporum canis, a common dermatophyte affecting humans and animals...
May 7, 2024: Acta Tropica
Juan Jimenez-Chunga, Luis A Gomez-Puerta, Ana Vargas-Calla, Julia Castro-Hidalgo, Carol Sánchez-Chicana, Maritza Calderón-Sánchez
Toxoplasma gondii is the causative agent of toxoplasmosis, a zoonotic disease of worldwide distribution. The aim of this study was to assess the seroprevalence of T. gondii in undergraduate students from Lima, Peru, and to identify the risk factors linked to the infection. For this, serum samples of 100 undergraduate students of the Faculty of Biological Sciences were tested for T. gondii antibodies with a commercially available ELISA. The seroprevalence of T. gondii in these subjects was 7%. Only the age of students showed a statistical association with T...
May 7, 2024: Acta Tropica
Suriyani Tan, Raynoo Thanan, Banchob Sripa, Sutas Suttiprapa
Opisthorchis viverrini is a pathogenic liver fluke that is known to cause cholangiocarcinoma in chronic infections. The underlying mechanism for this carcinogenesis is believed to be multifactorial, with parasite-derived excretory-secretory (ES) products potentially playing major roles. A recent study on these ES products has identified microRNAs (miRNA) that originate from O. viverrine but their influence on carcinogenesis remains understudied. Hence, we aimed to investigate the role of these miRNAs in the carcinogenesis of O...
May 6, 2024: Acta Tropica
Adolfo Borges, Bruno Lomonte
The scorpion Aegaeobuthus nigrocinctus inhabits areas in Turkey and the Levant region of the Middle East where severe/lethal envenomings have been reported. Previous research indicated its extreme venom lethality to vertebrates and distinct envenomation syndrome. We report on the composition of A. nigrocinctus venom from Lebanese specimens using nESI-MS/MS, MALDI-TOF MS, SDS-PAGE and RP-HPLC. Venom lethality in mice was also assessed (LD50 = 1.05 (0.19-1.91) mg/kg, i.p), confirming A. nigrocinctus venom toxicity from Levantine populations...
May 5, 2024: Acta Tropica
Alia Maisarah, Suharni Mohamad, Maruzairi Husain, Sarimah Abdullah, Rahmah Noordin
Toxoplasma gondii is a neurotropic protozoan parasite that affects neuronal processing in the brain. This study aimed to investigate the prevalence of T. gondii infection in psychiatric disorder patients. We also investigated the potential association between sociodemographic, clinical manifestation, and behaviour of Toxoplasma-seropositive patients with psychiatric disorders. Commercial ELISAs (IgG, IgM, and IgG avidity) using serum and PCR using buffy coat were performed on samples from 54 individuals in each of the following groups: patients diagnosed with depressive disorder, bipolar disorder, and schizophrenia, as well as psychiatrically healthy subjects (control group)...
May 4, 2024: Acta Tropica
Flávia Benini da Rocha Silva, Danilo Ciccone Miguel, Karen Minori, Nathália Grazzia, Vicente Estevam Machado, Cíntia Marcelo de Oliveira, Christiann Davis Tosta, Mara Cristina Pinto
Lutzomyia longipalpis is the primary vector of Leishmania infantum in the Americas and a permissive vector for Leishmania amazonensis. Previous studies showed that Leishmania infantum-infected hosts can release different volatile organic compounds (VOCs) compared with uninfected hosts, presenting a higher attractiveness to vectors. In this study, we aimed to evaluate a possible effect of L. amazonensis infection of golden hamsters in three parameters: attractiveness to Lu. longipalpis females; blood volume ingested by sand fly females; and VOCs released by the animals...
May 4, 2024: Acta Tropica
Martina Nocerino, Paola Pepe, Elena Ciccone, Maria Paola Maurelli, Antonio Bosco, Franck Boué, Gérald Umhang, Samia Lahmar, Yousra Said, Smaragda Sotiraki, Panagiota Ligda, AbdElkarim Laatamna, Nassiba Reghaissia, Giorgio Saralli, Vincenzo Musella, Maria Chiara Alterisio, Giuseppe Piegari, Laura Rinaldi
Cystic echinococcosis (CE), caused by the tapeworm Echinococcus granulosus, is a zoonotic parasitic disease that still represents a serious threat to human and animal health worldwide. The Mediterranean basin is recognized as one of the major hotspots of CE due to several factors, including the presence of diverse intermediate host species as well as socio-economic and cultural conditions of local communities. This study aims to take a closer look at epidemiological data on CE in the Mediterranean area and assess the knowledge attitudes and practices of shepherds towards this disease in four countries (Algeria, Greece, Italy and Tunisia), highly endemic for CE, with the final goal of identifying highly endemic risk areas and practices in use which might potentially allow the persistence of E...
May 3, 2024: Acta Tropica
Don Enrico Buebos-Esteve, Nikki Heherson A Dagamac
Previous dengue epidemiological analyses have been limited in spatiotemporal extent or covariate dimensions, the latter neglecting the multifactorial nature of dengue. These constraints, caused by rigid and traditional statistical tools which collapse amidst 'Big Data', prompt interpretable machine-learning (iML) approaches. Predicting dengue incidence and mortality in the Philippines, a data-limited yet high-burden country, the mlr3 universe of R packages was used to build and optimize ML models based on remotely sensed provincial and dekadal 3 NDVI and 9 rainfall features from 2016-2020...
May 1, 2024: Acta Tropica
Kandasamy Rajesh, Antonyraj Matharasi Perianaika Anahas, Nainangu Prasannabalaji, Mary Sophiya, Karuppasamy Ramanathan, Nallusamy Sivakumar, Ganapathy Dhanraj, Dharumadurai Dhanasekaran
Mosquito-borne disease pandemics, such as the Zika virus and chikungunya, have escalated cognizance of how critical it is to implement proficient mosquito vector control measures. The prevention of Culicidae is becoming more difficult these days because of the expeditious imminence of synthetic pesticide resistance and the universal expansion of tremendously invasive mosquito vectors. The present study highlights the insecticidal and larvicidal efficacy of the prospective novel actinobacterium derived from the marine Streptomyces sp...
April 30, 2024: Acta Tropica
Aftab Shaukat, Shahid Ali Rajput, Mehboob Ali, Rizwan Shukat, Sana Hanif, Mubashar Hassan, Dalia Fouad, Farid S Ataya, Irfan Shaukat, Arfan Yousaf, Shadab Shaukat, Renwei Su
Endometritis reduces reproductive effectiveness and leads to significant financial losses in the dairy sector. Luteolin is a natural phyto-flavonoid compound with many biological activities. However, the therapeutic effect of Luteolin against lipopolysaccharides (LPS)-induced endometritis has not yet been explored. A total of eighty female Kunming mice were randomly assigned into four treatment groups (n = 20). Following a successful initiation of the endometritis model by LPS, Luteolin was intraperitoneally administered three times, at six-hour intervals between each injection in the Luteolin groups...
April 29, 2024: Acta Tropica
Barbara Byttebier, Verónica Loetti, María Sol De Majo, Sylvia Fischer
In temperate regions, the populations of Aedes aegypti (L.) (Diptera: Culicidae) remain in the egg stage during the winter. In Buenos Aires, Argentina, a temperate region in the southern limit of Ae. aegypti distribution, the start of the next reproductive season and the rate of increase of the adult population depend on the egg bank that remains after the winter. This study aimed to analyze the mortality, field-hatching, and survival of eggs exposed to field conditions representative of those that occur in nature...
April 28, 2024: Acta Tropica
S Brindha, Shilpshri V Shinde, Mahaling Bhure, Sandeep P Chaudhari, Wiqar A Khan, Nitin V Kurkure, Deepak B Rawool, Sukhadeo B Barbuddhe
Coxiellosis in animals is caused by the zoonotic pathogen, Coxiella burnetii. Although the disease is of public health importance it remains underdiagnosed and underreported. The cross- sectional study was aimed to estimate the occurrence of the disease in livestock of study area and also to identify the risk factors associated with the disease in animals. Blood, serum, and vaginal swabs samples were collected from 200 ruminants (cattle, sheep, and goats), across various farms in Karnataka, India. These samples were then screened using ELISA and PCR (com1 and IS1111)...
April 28, 2024: Acta Tropica
Keyi Yu, Jianping Wu, Minghao Wang, Yizhou Cai, Minhui Zhu, Shenjun Yao, Yibin Zhou
Aedes albopictus (Diptera: Culicidae) plays a crucial role as a vector for mosquito-borne diseases like dengue and zika. Given the limited availability of effective vaccines, the prevention of Aedes-borne diseases mainly relies on extensive efforts in vector surveillance and control. In multiple mosquito control methods, the identification and elimination of potential breeding sites (PBS) for Aedes are recognized as effective methods for population control. Previous studies utilizing unmanned aerial vehicles (UAVs) and deep learning to identify PBS have primarily focused on large, regularly-shaped containers...
April 28, 2024: Acta Tropica
Laura J Hernández-Zambrano, Heliairis Alfonso-González, Sindy P Buitrago, Carlos J Castro-Cavadía, Diego Garzón-Ospina
Malaria remains a public health challenge. Since many control strategies have proven ineffective in eradicating this disease, new strategies are required, among which the design of a multivalent vaccine stands out. However, the effectiveness of this strategy has been hindered, among other reasons, by the genetic diversity observed in parasite antigens. In Plasmodium vivax, the Erythrocyte Binding Protein (PvEBP, also known as DBP2) is an alternate ligand to Duffy Binding Protein (DBP); given its structural resemblance to DBP, EBP/DBP2 is proposed as a promising antigen for inclusion in vaccine design...
April 27, 2024: Acta Tropica
Pedro Montini, Sylvia Fischer
The "oviposition preference-offspring performance" hypothesis proposes that females lay their eggs in habitats that maximize the fitness of their offspring. The aim of this study was to assess the oviposition site selection by Aedes aegypti females and the success of their larvae in habitats with different detritus accumulation times, under conditions representative of the natural spatial variability of detritus quality and quantity in the Metropolitan Area of Buenos Aires, Argentina. Two experiments were performed, one assessing oviposition site selection and the other analyzing developmental success...
April 27, 2024: Acta Tropica
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