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21.
The Arabian species of the Tetramorium
squaminode-group are treated. Tetramorium
squaminode Santschi, 1911 is recorded for the first time from the Kingdom of Saudi Arabia and the Arabian Peninsula. Keys to the two Arabian species of the Tetramorium
squaminode-group, Tetramorium
latinode Collingwood & Agosti, 1996 and Tetramorium
squaminode, based on worker and queen castes, are given and a regional distribution map is provided. Notes on habitats of Tetramorium
squaminode are presented. 相似文献
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Wissem Ghawar Hanène Attia Jihene Bettaieb Rihab Yazidi Dhafer Laouini Afif Ben Salah 《PloS one》2014,9(9)
Zoonotic cutaneous leishmaniasis (ZCL) caused by Leishmania (L.) major parasites represents a major health problem with a large spectrum of clinical manifestations. Psammomys (P.) obesus and Meriones (M.) shawi represent the most important host reservoirs of these parasites in Tunisia. We already reported that infection prevalence is different between these two rodent species. We aimed in this work to evaluate the importance of genetic diversity in L. major parasites isolated from different proven and suspected reservoirs for ZCL. Using the multilocus microsatellites typing (MLMT), we analyzed the genetic diversity among strains isolated from (i) P. obesus (n = 31), (ii) M. shawi (n = 8) and (iii) Mustela nivalis (n = 1), captured in Sidi Bouzid, an endemic region for ZCL located in the Center of Tunisia. Studied strains present a new homogeneous genotype profile so far as all tested markers and showed no polymorphism regardless of the parasite host-reservoir origin. This lack of genetic diversity among these L. major isolates is the first genetic information on strains isolated from Leishmania reservoirs hosts in Tunisia. This result indicates that rodent hosts are unlikely to exert a selective pressure on parasites and stresses on the similarity of geographic and ecological features in this study area. Overall, these results increase our knowledge among rodent reservoir hosts and L. major parasites interaction. 相似文献
26.
Kalimuthu Loganathan Vasugi Chellamuthu Dhanalakshmi Karupuswami Kannan Mohan Udaiyan Suresh Chellasamy Panneerselvam Subrata Trivedi Al Thabiani Aziz Fuad A. Alatawi Alaa M. Munshi Hatem A. Al-Aoh Hamza S. Al-Shehri Aliyah S. Alhawiti 《Entomological Research》2023,53(4):133-147
Mosquitoes serve as reservoirs for viruses and other microorganisms, posing a significant health-related issue for both humans as well as livestock. Control of these deadly disease-producing mosquito vectors is of paramount importance. The chemical analysis of Parmotrema reticulatum was examined by GC–MS. Further, lichen-mediated AgNPs were confirmed through UV–vis spectrophotometry, FTIR, TEM-EDX, and XRD. After 24 h post-treatment, the lichen-synthesized AgNPs showed considerable toxicity against distinct Aedes aegypti instars with LC50 values of 44.61 (I instar), 51.27 (II instars), 61.34 (III instars), 72.95 (IV instar), and 89.84 (pupae) μg/mL, respectively. Further, both P. reticulatum extract and AgNPs greatly reduced the survival and reproductive efficiency of A. aegypti adults. Eventually, in conventional laboratory circumstances, the predatory effectiveness of Gambusia affinis against Ae. aegypti II and III instar larvae were 71.35% and 53.40%, respectively. In antibacterial assays, low concentrations of the P. reticulatum synthesized AgNPs inhibited the development of Pseudomonas aeruginosa and Citrobacter freundii. Surface damage, ROS production, and protein leakage are the antibacterial mechanisms of AgNPs. Overall, the lichen-derived AgNPs can be regarded as newer and safer Ae. aegypti control instruments. 相似文献
27.
Sajjad H. Sumrra Muhammad Hanif Muhammad Safwan Akram Javeed Akhtar Saad M. Al-Shehri 《Journal of enzyme inhibition and medicinal chemistry》2016,31(4):590-598
A new series of compounds derived from thiophene-2-carboxamide were synthesized and characterized by IR, 1H-NMR and 13C-NMR, mass spectrometry and elemental analysis. These compounds were further used to prepare their Co(II), Ni(II), Cu(II) and Zn(II) metal complexes. All metal(II) complexes were air and moisture stable. Physical, spectral and analytical data have shown the Ni(II) and Cu(II) complexes to exhibit distorted square-planar and Co(II) and Zn(II) complexes tetrahedral geometries. The ligand (L1) and its Cu(II) complex were characterized by the single-crystal X-ray diffraction method. All the ligands and their metal(II) complexes were screened for their in-vitro antimicrobial activity. The antibacterial and antifungal bioactivity data showed that the metal(II) complexes were found to be more potent than the parent ligands against one or more bacterial and fungal strains. 相似文献
28.
Mostafa R. Sharaf Shahid A. Akbar Hathal M. Al Dhafer Abdulrahman S. Aldawood 《Zoology in the Middle East.》2017,63(1):68-75
Leptogenys polaszeki sp. n. is described from the Asir Mountains, Saudi Arabia, based on the worker caste. The new species is a member of the L. sulcinoda-group and appears closest to L. bellii Emery, 1901, originally described from Ethiopia. The likely male caste of L. polaszeki sp. n. is described based on a single specimen collected by a pitfall trap in the type locality.
http://www.zoobank.org/urn:urn:lsid:zoobank.org:pub:5D3BF3AF-5308–48E8–8416–902278909AD5 相似文献
29.
Osama Mostafa Mohammed Al-Shehri Mahmoud Moustafa 《Saudi Journal of Biological Sciences》2022,29(1):217-227
Parasitic diseases especially those prevail in tropical and subtropical regions severely threaten the lives of people due to available drugs found to be ineffective as several resistant strains have been emerged. Due to the complexity of the marine environment, researchers considered it as a new field to search for compounds with therapeutic efficacy, marine sponges represents the milestone in the discovery of unique compounds of potent activities against parasitic infections. In the present article, literatures published from 2010 until March 2021 were screened to review antiparasitic potency of bioactive compounds extracted from marine sponges. 45 different genera of sponges have been studied for their antiparasitic activities. The antiparasitic activity of the crude extract or the compounds that have been isolated from marine sponges were assayed in vitro against Plasmodium falciparum, P. berghei, Trypanosoma brucei rhodesiense, T. b. brucei, T. cruzi, Leishmania donovani, L. tropica, L. infantum, L. amazonesis, L. major, L. panamesis, Haemonchus contortus and Schistosoma mansoni. The majority of antiparastic compounds extracted from marine sponges were related to alkaloids and peroxides represent the second important group of antiparasitic compounds extracted from sponges followed by terpenoids. Some substances have been extracted and used as antiparasitic agents to a lesser extent like steroids, amino acids, lipids, polysaccharides and isonitriles. The activities of these isolated compounds against parasites were screened using in vitro techniques. Compounds' potent activity in screened papers was classified in three categories according to IC50: low active or inactive, moderately active and good potent active. 相似文献
30.
Mohammed Ali Al-Duais Zuhair M. Mohammedsaleh Hamza S. Al-Shehri Yahya S. Al-Awthan Suhair A. Bani-Atta Ali A. Keshk Syed Khalid Mustafa Adel D. Althaqafy Jozaa N. Al-Tweher Hatem A. Al-Aoh Chellasamy Panneerselvam 《Luminescence》2022,37(4):633-641
In the present work, an improved class of protein functionalized fluorescent 2D Ti3C2 MXene quantum dots (MXene QDs) was prepared using a hydrothermal method. Exfoliated 2D Ti3C2 sheets were used as the starting precursor and transport protein bovine serum albumin (BSA) was used to functionalize the MXene QDs. BSA-functionalized MXene QDs exhibited excellent photophysical property and stability at various physiological parameters. High-resolution transmission electron microscopy analysis showed that the BSA@MXene QDs were quasispherical in shape with a size of ~2 nm. The fluorescence intensity of BSA@MXene QDs was selectively quenched in the presence of Fe3+ ions. The mechanism of fluorescence quenching was further substantiated using time-resolved fluorescence and Stern–Volmer analysis. The sensing assay showed a linear response within the concentration range 0–150 μM of Fe3+ ions with excellent limit of detection. BSA@MXene QDs probe showed good selectivity toward ferric ions even in the presence of other potential interferences. The practical applicability of BSA@MXene QDs was further tested in real samples for Fe3+ ion quantification and the sensor had good recovery rates. The cytotoxicity studies of the BSA@MXene QDs toward the human glioblastoma cells revealed that BSA@MXene QDs are biocompatible at lower doses and showed significant cytotoxicity at higher dosages. 相似文献