Browsing by Subject "Occurrence"

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    Occurrence and limited zoonotic potential of Cryptosporidium spp., Giardia duodenalis, and Balantioides coli infections in free-ranging and farmed wild ungulates in Spain
    (Elsevier, 2023-04-27) Dashti, Alejandro; Köster, Pamela C.; Bailo, Begoña; Sánchez de las Matas, Ana; Habela, Miguel Ángel; Rivero-Juarez, Antonio; Vicente Ibáñez, Joaquín; Serrano, Emmanuel; Arnal, María C.; Fernández de Luco, Daniel; Morrondo, Patrocinio; Armenteros, José A.; Balseiro, Ana; Cardona, Guillermo A.; Martínez-Carrasco Pleite, Carlos; Ortiz, José Antonio; Carpio, Antonio José; Calero Bernal, Rafael; González-Barrio, David; Carmena, David; Sanidad Animal; Facultad de Veterinaria
    Little information is currently available on the occurrence and molecular diversity of the enteric protozoan parasites Cryptosporidium spp., Giardia duodenalis, and Balantioides coli in wild ungulates and the role of these host species as potential sources of environmental contamination and consequent human infections. The presence of these three pathogens was investigated in eight wild ungulate species present in Spain (genera Ammotragus, Capra, Capreolus, Cervus, Dama, Ovis, Rupicapra, and Sus) by molecular methods. Faecal samples were retrospectively collected from free-ranging (n = 1058) and farmed (n = 324) wild ungulates from the five Spanish bioregions. Overall infection rates were 3.0% (42/1382; 95% CI: 2.1–3.9%) for Cryptosporidium spp., 5.4% (74/1382; 95% CI: 4.2–6.5%) for G. duodenalis, and 0.7% (9/1382; 95% CI: 0.3–1.2%) for B. coli. Cryptosporidium infection was detected in roe deer (7.5%), wild boar (7.0%) and red deer (1.5%), and G. duodenalis in southern chamois (12.9%), mouflon (10.0%), Iberian wild goat (9.0%), roe deer (7.5%), wild boar (5.6%), fallow deer (5.2%) and red deer (3.8%). Balantioides coli was only detected in wild boar (2.5%, 9/359). Sequence analyses revealed the presence of six distinct Cryptosporidium species: C. ryanae in red deer, roe deer, and wild boar; C. parvum in red deer and wild boar; C. ubiquitum in roe deer; C. scrofarum in wild boar; C. canis in roe deer; and C. suis in red deer. Zoonotic assemblages A and B were detected in wild boar and red deer, respectively. Ungulateadapted assemblage E was identified in mouflon, red deer, and southern chamois. Attempts to genotype samples positive for B. coli failed. Sporadic infections by canine- or swine-adapted species may be indicative of potential cross-species transmission, although spurious infections cannot be ruled out. Molecular evidence gathered is consistent with parasite mild infections and limited environmental contamination with (oo)cysts. Free-ranging wild ungulate species would not presumably play a significant role as source of human infections by these pathogens. Wild ruminants do not seem to be susceptible hosts for B. coli.
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    Reports on the presence of the milkfish Chanos chanos (Forsskål, 1775) (Gonorynchiformes: Chanidae) in the Shatt al-Arab River, Basrah and in the marine waters of Iraq, with notes on its tolerance to freshwater
    (Universidad de Murcia, 2019) Qasim, Audai Mohamed; Mutlak, Falah Marouf; Al-Faisa, Abbas Jassim; Jawad, Laith Abd Jalil
    Registro de la presencia del sabalote Chanos chanos (Forsskål, 1775) (Gonorynchiformes: Chanidae) en el río Shatt al-Arab/ Arvand, Basora y las aguas marinas de Irak, con notas sobre su tolerancia al agua dulce En este estudio, se describen dos especímenes de sabalote Chanos chanos (LT 380 y 390 mm) en aguas marinas de Irak y otros cuatro del río Shatt al-Arab/Arvand en la ciudad de Abu alKhaseeb, al sur de Irak (LT 310-312,5 mm). Ambas localidades significan una extensión del rango de distribución para el sabalote y la de Abu al-Khaseeb representa la distancia máxima para que esta especie ascienda por el río. Se proporcionan y comparan datos morfométricos y merísticos con especímenes de otras partes del mundo. Se incide sobre la tolerancia en hábitats dulceacuícolas a 65 km del mar.
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    Roles of microRNAs during glioma tumorigenesis and progression
    (Universidad de Murcia. Departamento de Biología Celular e Histología, 2019) Wang, Shuwei; Yin, Yutong; Liu, Shuang
    Glioma is the most common and aggressive type of brain tumor. It has a poor prognosis and a high recurrence rate. Despite continued advances in surgery, chemotherapy and radiotherapy, the clinical outcomes remain dismal. MicroRNAs (miRNAs) play important roles in the initiation and progression of a multitude of tumors. Until now, the molecular mechanism that is responsible for glioma tumorigenesis and progression remains unclear. Increasing evidence has shown that miRNAs play an important role in glioma. In this review, we focus on the current advances in determining the role of miRNAs in regulating tumorigenesis and the progression of glioma. In addition, the relevant roles of miRNAs about