<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Bassem Yousef Sheikh</style></author><author><style face="normal" font="default" size="100%">Manal Mohamed Elhassan Taha</style></author><author><style face="normal" font="default" size="100%">Waleed Syaed Koko</style></author><author><style face="normal" font="default" size="100%">Siddig Ibrahim Abdelwahab</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Antimicrobial Effects of Thymoquinone on Entamoeba histolytica and Giardia lamblia</style></title><secondary-title><style face="normal" font="default" size="100%">Pharmacognosy Journal</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Entamoeba histolytica</style></keyword><keyword><style  face="normal" font="default" size="100%">Giardia lamblia.</style></keyword><keyword><style  face="normal" font="default" size="100%">Nigella sativa</style></keyword><keyword><style  face="normal" font="default" size="100%">Prophetic Medicine</style></keyword><keyword><style  face="normal" font="default" size="100%">Thymoquinone</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2015</style></year><pub-dates><date><style  face="normal" font="default" size="100%">December 2015</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">8</style></volume><pages><style face="normal" font="default" size="100%">168-170</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Background&lt;/strong&gt;: Parasitic infections are a major difficulty in tropical and subtropical countries. Traditionally medicinal plants have been used in folk medicine to treat parasitic infections and are a valuable source of novel anti-parasitics. &lt;strong&gt;Objective: &lt;/strong&gt;In our search for therapeutic alternatives to anti- protozoal chemotherapy, thymoquinone, the active ingredient of Black cumin (Nigella sativa) was examined. &lt;strong&gt;Materials and Methods: &lt;/strong&gt;Thymoquinone was tested against Entamoeba histolytica and Giardia lamblia using in vitro susceptibility assays and the mortality of the parasites were then obtained using the standard calculations. The compound was also tested for 48 and 72 hours on both parasites. &lt;strong&gt;Results:&lt;/strong&gt; The current study indicate that the mortality of TQ showed 85.5%, 91.5% and 96.8% mortality on E. histolytica for 25 ppm at 24 hr, 48 and 72 hr, respectively, with IC50 2&amp;yen;10-19,. On the other hand, this natural compound showed a mortality of 82.83%, 91.76% and 96.62% mortality on G. lamblia for 25 ppm at 24 hr, 48 and 72 hr, respectively, with IC50 4.8&amp;yen;10-5. Metrondizole powder gave 70.9% mortality at 156 ppm at the same times.&lt;strong&gt; Conclusion:&lt;/strong&gt; The current results indicate that TQ is more potent on E. histolytica compared to G. lamblia. Further pharmacological studies were needed to help in the clinical presentation of thymoquinone.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue><work-type><style face="normal" font="default" size="100%">Original Article</style></work-type><section><style face="normal" font="default" size="100%">168</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Bassem Yousef Sheikh&lt;sup&gt;1&lt;/sup&gt;, Manal Mohamed Elhassan Taha&lt;sup&gt;2,&lt;/sup&gt; Waleed Syaed Koko&lt;sup&gt;3&lt;/sup&gt;, and Siddig Ibrahim Abdelwahab&lt;sup&gt;3&lt;/sup&gt;*&lt;/strong&gt;&lt;/p&gt;

&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;Al-Moalim MA Bin Ladin (MABL) chair for Scientific Miracles of Prophetic Medicine, College of Medicine, Taibah University, SAUDI ARABIA.&lt;/p&gt;

&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;2&lt;/sup&gt;Unit of Biomedical Research, Medical Research Centre, Jazan University, P.O. Box 114 Jazan, Jazan 45142, SAUDI ARABIA.&lt;/p&gt;

&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;3&lt;/sup&gt;Department of Microbiology, Medicinal and Aromatic Research Institute, National Research Centre, Khartoum, SAUDI ARABIA. 4Unit of Biomedical Research, Substance Abuse Research Centre, Jazan University, P.O. Box 114 Jazan, Jazan 45142, SAUDI ARABIA.&lt;/p&gt;
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