Ants: Adaptable creatures that share your food and built nest or sub-nest around you. Though they could not transmit diseases but the sight of them is consider dirty and unhygienic.
Cockroaches: This origin has not changed much in the past 400 million years. They transmit diseases such as typhoid fever, salmonellosis (both could be fatal), trigger asthma attack, food poisoning and skin irritation.
