Table 2. Conjugates of GNPs with antigens and haptens used for immunization and vaccination of animals.

Amino acids	Neurotransmitters and hormones	Antibiotics and other drugs	Bacterial, protozoan and viral antigens	Other substances
Glutamate	Acetylcholine	Chloramphenicol	Yersinia pseudotuberculosis	Platelet-activating factor
Aspartate	Serotonin	Gentamicin	Yersinia pestis	Quinolinic acid
Glycine	Norepinephrine	Neomycin	Salmonella typhimurium	Biotin
Serine	Histamine	Lincomycin	Brucella abortus	Lysophosphatide acid
Cysteine	Testosterone	Kanamycin	Mycobacterium tuberculosis	Immunophilin
Taurine	γ-Aminobutyric acid	Clindamycin	Streptococcus pneumoniae	Endostatin
Citrulline	Nortestosterone	Ofloxacinum	Neisseria meningitides	Azobenzene
	Estradiol	Tilmicosin	Burkholderia mallei	Phenyl-β-d-thioglucoronide
		Ivermectin	Escherichia coli	Indole-3-acetic acid
		Diminazene	Listeria monocytogenes	Bacteriorhodopsin
		Clenbuterol	Pseudomonas aeruginosa	Actin
		Xylazine	Plasmodium malariae	Bovine serum albumin
			Plasmodium falciparum	Ferritin
			Opisthorchis felineus	Tuberculin
			Hepatitis C virus	Tetanus toxoid
			Hepatitis B virus	α-Methylacyl-CoA racemase
			Hepatitis E virus	Protein kinase
			Influenza virus	Carbonic anhydrase
			Foot-and-mouth disease virus	Tumor antigens
			Transmissible gastroenteritis virus	Recombinant and natural peptides
			Tick-borne encephalitis virus	Oligosaccharides
			West Nile virus
			Respiratory syncytial virus
			Rabies virus
			Dengue virus
			Dengue virus
			Coronavirus
			HIV-1