en 37034889 <p><span style="font-size:12pt"><strong><span style="font-size:10.0pt">Background: E</span></strong><span style="font-size:10.0pt">xternal factors have the potential to act as immunostimulants in order to influence the body&#39;s protection from many foreign antigens. We intended to investigate the ethanol extract Formulary of F-MaCg effect as an immunostimulant.&nbsp;</span></span></p> <p><span style="font-size:12pt"><strong><span style="font-size:10.0pt">Methods:</span></strong><span style="font-size:10.0pt">&nbsp;A purely experimental with a completely randomized design was used on twenty-four white male rats. They were divided into four groups:1) G0 [given aquades (5 <em>ml</em>)]; 2) G1 [given F-MaCg-75 <em>mg/gr</em> BW (Body Weight)]; 3) G2 (F-MaCg -150 <em>mg/gr</em> plus Hepatitis B vaccine at the beginning and the end of treatment); and 4) G3 (F-MaCg -300 <em>mg/gr</em> BW plus hepatitis B vaccine at the end of treatment). The rat&#39;s spleen lymphocyte blast transformation was evaluated on the 15th and 37th days. Lymphocytes were examined using microtetrazolium assays. Optical Density (OD) was measured using an ELISA reader [493 <em>n<span style="background-color:white">&mu;</span></em> (nanomicro)]. Observation of lymphocyte viability by a counting chamber using a light microscope and trypan blue 1 % before being cultured with Phytohaemoaglutinin.</span></span></p> <p><span style="font-size:12pt"><strong><span style="font-size:10.0pt">Results:</span></strong><span style="font-size:10.0pt">&nbsp;Lymphocyte cell viability in the hepatitis B vaccine-induced group on the 15th day showed the highest average value in the G2 (1,484/<em>mcl</em> of blood); on the 37th day, it was in G3 (1,578/<em>mcl</em> of blood). The proliferative activity of spleen lymphocytes indicated by the difference in the OD values of the four treatment groups was 0.467, 0.913, 1.619, and 1.473 <em>n<span style="background-color:white">&mu;</span></em>, respectively. Histological observations of the spleen showed differences at all given formulary dose concentrations.&nbsp;</span></span></p> <p><strong><span style="font-size:10.0pt">Conclusion:&nbsp;</span></strong><span style="font-size:10.0pt">F-MaCg could be an immunostimulant because of its ability to trigger a cellular immune response.</span></p> Adjuvant, Enzyme-linked immunosorbent assay, Immunologic, Lymphocyte activation, Lymphocytes, Male, Plant extracts, Rats 91 99 https://www.ajmb.org/En/Article.aspx?id=60535 https://www.ajmb.org/PDF/En/FullText/60535.pdf ZulkifliZulkifliFaculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia92008DarmawiDarmawiDepartment of Veterinary Medicine, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia92010SaidUsmanDepartment of Public Health, Faculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia92011KurniaFitri Jamil 92009