Answer. Ad hoc is a word that originally comes from Latin and means âfor thisâ or for this situation.. In current American English it is used to describe something that has been formed or used for a special and immediate purpose, without previous planning.Ad hoc can be used as an adjective or an adverb.It is used more often as an adjective, especially in these expressions: 1  ad hoc committee. 2  ad hoc group. 3  ad hoc basis.n current American English it is used to describe something that has been formed or used for a special and immediate purpose, without previous planning. Ad hoc can be used as an adjective or an adverb. It is used more often as an adjective, especially in these expressions: 1  ad hoc committee. 2  ad hoc group. 3  ad hoc basis.
pestifero (masc.) (fem. pestifera, masc. pl. pestiferi, fem. pl. pestifere) pestilential, pestiferous; noxious (smell) Anagrams. epistrofe
Yersinia pestis. By: Katia Sutyak. Life History Yersinia pestis is the causative agent of the systemic invasive infectious disease often referred to as the plague. The Y. pestis is an extremely virulent pathogen that is likely to cause severe illness and death upon infection unless antibiotics are administered.ransmission. Y. pestis has the ability to cause disease in rodents, insects and humans. The primary carriers of the pathogen are the Oriental rat flea, Xenopsylla cheopis, and infected rodents. The path of transmission to humans usually involves a flea feeding on an infected rodent and becoming a carrier of infection.