The problem of multidrug-resistant pathogens as bacteria, fungi and yeast in addition to the restriction of using antibiotics as growth promoting substances in food has attracted the attention to looking for alternative sources instead of conventional antibiotics like natural products which have antimicrobial activity. Much interests and researches have been focused on using natural antimicrobial peptides and chemicals extracted from animal secretions and some insect’s venoms as they exhibit antimicrobial activity against pathogens with lower resistance and higher synergistic effects if they were given in combination with blends of them. In this paper, some antimicrobial chemicals extracted from giraffes are shown in addition to their activity against Aspergillus fumigatus species using optical density analysis technique then their Minimum Inhibitory Concentrations (MIC) will be determined as well as ICs 50 to measure the potency to inhibit a biological function using programmes like Gene5, graph pad prism as well as testing antimicrobial activity of some chemicals which are provided in animal secretions.
