an animal that is infected by a parasite or disease agent, and serves as a source of infection for another species. Associated terms: reservoir of infection.
                                                            
                                                     
                        
                                                
                        
                        
                            An animal from which infection may be passed to domesticated stock or to human beings.
                                                            
                                                     
                        
                                                
                        
                        
                            An animal species which carries a pathogen without detriment to itself and serves as a source of infection.