pathogenicity round yellow in line style

amoeba analysis bacillus background bacteria bacterial bacteriology biological biology care cholera circle circular coli colony concept contaminants dangerous disease elements epidemic experiment flora germs graphic health hygiene icon illustration immune infected influenza isolated laboratory lactobacillus line linear logo micro microbe microbiology microorganism microscopic mirco modern molecular outline pandemic parasit pathogen pathogenic pathogenicity poster prebiotic research round science set shape sick sign silhouette small style substance symbol system technology test thin vector virus yellow