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Amor Hedfi
Department of Biology, College of Sciences, Taif University, Taif, Saudi Arabia

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Research article
Published: 16 August 2021 in PLOS ONE
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The re-emergence of virulent strains of the Infectious Bursal Disease Virus (IBDV) leads to significant economic losses of poultry industry in Pakistan during last few years. This disease causes the infection of bursa, which leads to major immune losses. A total number of 30 samples from five IBD outbreaks during the period of 2019–20 were collected from different areas of Faisalabad district, Pakistan and assayed by targeting the IBD virus VP2 region through RT-PCR. Among all the outbreaks, almost 80% of poultry birds were found positive for the IBDV. The bursa tissues were collected from the infected birds and histopathological examination of samples revealed severe lymphocytic depletion, infiltration of inflammatory cells, and necrosis of the bursa of Fabricius (BF). Positive samples were subjected to re-isolation and molecular characterization of IBDV. The Pakistan IBDV genes were subjected to DNA sequencing to determine the virus nucleotide sequences. The sequences of 100 Serotype-I IBDVs showing nearest homology were compared and identified with the study sequence. The construction of the phylogenetic tree for nucleotide sequences was accomplished by the neighbor-joining method in MEGA-6 with reference strains. The VP2 segment reassortment of IBDVs carrying segment A were identified as one important type of circulating strains in Pakistan. The findings indicated the molecular features of the Pakistan IBDV strains playing a role in the evolution of new strains of the virus, which will contribute to the vaccine selection and effective prevention of the disease.

ACS Style

Sanaullah Sajid; Sajjad Ur Rahman; Mashkoor Mohsin Gilani; Zia Ud Din Sindhu; Manel Ben Ali; Amor Hedfi; Mohammed Almalki; Shahid Mahmood. Molecular Characterization and Demographic Study on Infectious Bursal Disease Virus in Faisalabad District. PLOS ONE 2021, 16, e0254605 .

AMA Style

Sanaullah Sajid, Sajjad Ur Rahman, Mashkoor Mohsin Gilani, Zia Ud Din Sindhu, Manel Ben Ali, Amor Hedfi, Mohammed Almalki, Shahid Mahmood. Molecular Characterization and Demographic Study on Infectious Bursal Disease Virus in Faisalabad District. PLOS ONE. 2021; 16 (8):e0254605.

Chicago/Turabian Style

Sanaullah Sajid; Sajjad Ur Rahman; Mashkoor Mohsin Gilani; Zia Ud Din Sindhu; Manel Ben Ali; Amor Hedfi; Mohammed Almalki; Shahid Mahmood. 2021. "Molecular Characterization and Demographic Study on Infectious Bursal Disease Virus in Faisalabad District." PLOS ONE 16, no. 8: e0254605.

Journal article
Published: 10 July 2021 in Saudi Journal of Biological Sciences
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The current study investigated the exposure of the Mediterranean mussel (Mytilus galloprovincialis) to gold nanoparticles decorated zinc oxide (Au-ZnO NPs) and phosphonate [Diethyl (3-cyano-1-hydroxy-1-phenyl-2-methylpropyl)] phosphate (PC). The mussels were exposed to concentrations of 50 and 100 µg L-1 of both compounds alone, as well as to a mixture of both pollutants (i.e. Mix). The singular and the combined effect of each pollutant was investigated by measuring the concentration of various metals (i.e., Cu, Fe, Mn, Zn and Au) in the the digestive glands and gills of mussels, their filtration capacity (FC), respiration rate (RR) and the response of oxidative biomarkers, respectively, following 14 days of exposure. The concentrations of Cu, Fe, Mn, Zn and Au increased directly with Au-ZnO NPs in mussel tissues, but significantly only for Zn. In contrast, the mixture of Au-ZnO100 NPs and PC100 did not induce any significant increase in the content of metals in digetsve glands and gills, suggesting antagonistic interactions between contaminants. In addition, FC and RR levels decreased following exposure to Au-ZnO100 NPs and PC100 treatments and no significant alterations were observed after the exposure to 50 µg.L-1 of both contaminants and Mix. Hydrogen peroxide (H2O2) level, GSH/GSSG ratio, superoxide dismutase (SOD), catalase (CAT) and acetylcholinesterase (AChE) activities showed significant changes following the exposure to both Au-ZnO NPs and PC, in the gills and the digestive glands of the mussel. However, no significant modifications were observed in both organs following the exposure to Mix. The current study advances the understanding of the toxicity of NPs and phosphonates on M. galloprovincialis and sets the path for future ecotoxicological studies regarding the synergic effects of these substances on marine species. Moreover, the current experiment suggests that the oxidative stress and the neurotoxic pathways are responsive following the exposure of marine invertebrates to both nanoparticles and phosphonates, with potential antagonist interactions of these substances on the physiology of targeted species.

ACS Style

Badreddine Sellami; Imen Bouzidi; Amor Hedfi; Mohammed Almalki; Roquia Rizk; Octavian Pacioglu; Fehmi Boufahja; Hamouda Beyrem; David Sheehan. Impacts of nanoparticles and phosphonates in the behavior and oxidative status of the mediterranean mussels (Mytilus galloprovincialis). Saudi Journal of Biological Sciences 2021, 1 .

AMA Style

Badreddine Sellami, Imen Bouzidi, Amor Hedfi, Mohammed Almalki, Roquia Rizk, Octavian Pacioglu, Fehmi Boufahja, Hamouda Beyrem, David Sheehan. Impacts of nanoparticles and phosphonates in the behavior and oxidative status of the mediterranean mussels (Mytilus galloprovincialis). Saudi Journal of Biological Sciences. 2021; ():1.

Chicago/Turabian Style

Badreddine Sellami; Imen Bouzidi; Amor Hedfi; Mohammed Almalki; Roquia Rizk; Octavian Pacioglu; Fehmi Boufahja; Hamouda Beyrem; David Sheehan. 2021. "Impacts of nanoparticles and phosphonates in the behavior and oxidative status of the mediterranean mussels (Mytilus galloprovincialis)." Saudi Journal of Biological Sciences , no. : 1.

Journal article
Published: 01 July 2021 in Materials Research Express
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ACS Style

Sirajul Haq; Farwah Abbasi; Manel Ben Ali; Amor Hedfi; Amine Mezni; Wajid Rehman; Muhammad Waseem; Abdul Rehman Khan; Hamayun Shaheen. Green synthesis of cobalt oxide nanoparticles and the effect of annealing temperature on their physiochemical and biological properties. Materials Research Express 2021, 8, 075009 .

AMA Style

Sirajul Haq, Farwah Abbasi, Manel Ben Ali, Amor Hedfi, Amine Mezni, Wajid Rehman, Muhammad Waseem, Abdul Rehman Khan, Hamayun Shaheen. Green synthesis of cobalt oxide nanoparticles and the effect of annealing temperature on their physiochemical and biological properties. Materials Research Express. 2021; 8 (7):075009.

Chicago/Turabian Style

Sirajul Haq; Farwah Abbasi; Manel Ben Ali; Amor Hedfi; Amine Mezni; Wajid Rehman; Muhammad Waseem; Abdul Rehman Khan; Hamayun Shaheen. 2021. "Green synthesis of cobalt oxide nanoparticles and the effect of annealing temperature on their physiochemical and biological properties." Materials Research Express 8, no. 7: 075009.

Journal article
Published: 24 May 2021 in Saudi Journal of Biological Sciences
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In order to maintain a good environmental status of surface waters, an assessment of water quality carried out at specific intervals to monitor the changes of water quality in function of time. Human knowledge and experience are currently focused on using assessment methods, especially the integration of multiple constraining factors and considering them in conjugation with the correct decision-making process concerning the environment. When surface water is highly exposed to human activities, either from recreational or economic activity, the degree of vulnerability is high, and the quality of surface water is highly compromised. In case of Lake Balaton, there are many activities that can disrupt water dynamics. The first goal of this study is to determine the location of the least and most polluted sites around Lake Balaton. The processing of data was carried out by using multi-criteria decision techniques and environmental impact assessment method based on physical–chemical parameters in comparison with the limiting parameters. Based on the results of those methods water quality needs to be improved in western parts of the lake by using several geoengineering treatment techniques. This work covers a novel approach to comparing methods based on sum of ranking differences, whereas many method comparison studies suffer from ambiguity or from comparisons not being quite fair. This problem can be avoided if there are differences between ideal and actual rankings.

ACS Style

Roquia Rizk; Mesfin Alameraw; Mohamed Ali Rawash; Tatjána Juzsakova; Endre Domokos; Amor Hedfi; Mohammed Almalki; Fehmi Boufahja; Plavan Gabriel; Hesham M. Shafik; Ákos Rédey. Does Lake Balaton affected by pollution? Assessment through surface water quality monitoring by using different assessment methods. Saudi Journal of Biological Sciences 2021, 28, 5250 -5260.

AMA Style

Roquia Rizk, Mesfin Alameraw, Mohamed Ali Rawash, Tatjána Juzsakova, Endre Domokos, Amor Hedfi, Mohammed Almalki, Fehmi Boufahja, Plavan Gabriel, Hesham M. Shafik, Ákos Rédey. Does Lake Balaton affected by pollution? Assessment through surface water quality monitoring by using different assessment methods. Saudi Journal of Biological Sciences. 2021; 28 (9):5250-5260.

Chicago/Turabian Style

Roquia Rizk; Mesfin Alameraw; Mohamed Ali Rawash; Tatjána Juzsakova; Endre Domokos; Amor Hedfi; Mohammed Almalki; Fehmi Boufahja; Plavan Gabriel; Hesham M. Shafik; Ákos Rédey. 2021. "Does Lake Balaton affected by pollution? Assessment through surface water quality monitoring by using different assessment methods." Saudi Journal of Biological Sciences 28, no. 9: 5250-5260.

Journal article
Published: 08 May 2021 in Toxics
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The Paeonia emodi (P. emodi)-mediated iron oxide nanoparticles (Fe2O3 NPs) were screened for in-vitro and in-vivo antibacterial activity against the Staphylococcus aureus (S. aureus) (ATCC #: 6538) and Escherichia coli (E. coli) (ATCC #:15224). The synthesized Fe2O3 NPs were characterized via nitrogen adsorption-desorption process, X-ray diffractometer (XRD), transmission and scanning electron microscopies (TEM and SEM), energy dispersive X-ray (EDX) and Fourier transform infrared (FTIR) spectroscopies. The SBET was found to be 94.65 m2/g with pore size of 2.99 nm, whereas the average crystallite and particles size are 23 and 27.64 nm, respectively. The 4 μg/mL is the MIC that inhibits the growth of E. coli, whereas those for S. aureus are below the detection limit (<1.76 μg/mL). The tolerance limit of the mice model was inspected by injecting different concentration of Fe2O3 NPs and bacteria suspensions. The 14 ppm suspension was the tolerated dose and the concentration above were proved lethal. The most severe infection was induced in mice with injection of 3 × 107 CFUs of both bacteria, while the inoculation of higher concentrations of bacterial suspensions resulted in the mice’s death. The histopathological and hematological studies reveals that the no/negligible infection was found in the mice exposed to the simultaneous inoculation of Fe2O3 NPs (14 ppm) and bacterial suspensions (3 × 107 CFUs).

ACS Style

Amreen Shah; Isfahan Tauseef; Manel Ali; Muhammad Yameen; Amine Mezni; Amor Hedfi; Syed Haleem; Sirajul Haq. In-Vitro and In-Vivo Tolerance and Therapeutic Investigations of Phyto-Fabricated Iron Oxide Nanoparticles against Selected Pathogens. Toxics 2021, 9, 105 .

AMA Style

Amreen Shah, Isfahan Tauseef, Manel Ali, Muhammad Yameen, Amine Mezni, Amor Hedfi, Syed Haleem, Sirajul Haq. In-Vitro and In-Vivo Tolerance and Therapeutic Investigations of Phyto-Fabricated Iron Oxide Nanoparticles against Selected Pathogens. Toxics. 2021; 9 (5):105.

Chicago/Turabian Style

Amreen Shah; Isfahan Tauseef; Manel Ali; Muhammad Yameen; Amine Mezni; Amor Hedfi; Syed Haleem; Sirajul Haq. 2021. "In-Vitro and In-Vivo Tolerance and Therapeutic Investigations of Phyto-Fabricated Iron Oxide Nanoparticles against Selected Pathogens." Toxics 9, no. 5: 105.

Journal article
Published: 16 February 2021 in Environmental Pollution
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The majority of experimental studies carried out to date, regarding the effects of pollutants on meiofauna have been conducted by means of closed systems, and rarely using open ones. The current work explored the impact of three Polycyclic Aromatic Hydrocarbons (PAHs), anthracene, pyrene and benzo[a]pyrene, applied alone or combined, on meiobenthic nematodes using both systems. The results revealed that single PAHs impacted the nematofauna similarly in closed or open systems with a higher toxicity observed for benzo[a]pyrene. However, the closed microcosms contaminated with PAHs became organically enriched, resulting in more non-selective deposit feeders and omnivores-carnivores. Taxonomic and functional effects related to combinations of PAHs were close to those of individual treatments in closed systems, however, for open ones, the outcomes were different. The caudal morphology influenced the response of taxa during their avoidance/endurance of hydrocarbons in open systems where the effects of PAHs mixtures appeared not only additive but also synergetic. Based on the results of the study, the use of open systems is preferred to closed ones as the research outcomes were more accurate and representing better conditions prevailing in nature.

ACS Style

Amor Hedfi; Manel Ben Ali; Montaser M. Hassan; Bander Albogami; Samia S. Al-Zahrani; Ezzeddine Mahmoudi; Paraskevi K. Karachle; Melissa Rohal-Lupher; Fehmi Boufahja. Nematode traits after separate and simultaneous exposure to Polycyclic Aromatic Hydrocarbons (anthracene, pyrene and benzo[a]pyrene) in closed and open microcosms. Environmental Pollution 2021, 276, 116759 .

AMA Style

Amor Hedfi, Manel Ben Ali, Montaser M. Hassan, Bander Albogami, Samia S. Al-Zahrani, Ezzeddine Mahmoudi, Paraskevi K. Karachle, Melissa Rohal-Lupher, Fehmi Boufahja. Nematode traits after separate and simultaneous exposure to Polycyclic Aromatic Hydrocarbons (anthracene, pyrene and benzo[a]pyrene) in closed and open microcosms. Environmental Pollution. 2021; 276 ():116759.

Chicago/Turabian Style

Amor Hedfi; Manel Ben Ali; Montaser M. Hassan; Bander Albogami; Samia S. Al-Zahrani; Ezzeddine Mahmoudi; Paraskevi K. Karachle; Melissa Rohal-Lupher; Fehmi Boufahja. 2021. "Nematode traits after separate and simultaneous exposure to Polycyclic Aromatic Hydrocarbons (anthracene, pyrene and benzo[a]pyrene) in closed and open microcosms." Environmental Pollution 276, no. : 116759.