Which of the following is NOT true about human plague (Yersinia pestis infection)? Infected fleas' gastrointestinal tract is blocked by Y. pestis growth, causing them to regurgitate and infect a new host when they bite None of the other four answers (All are true about human plague) Usually acquired in the US from bites of fleas that have fed on infected wild rodents. Painful swollen lymph nodes are called "buboes", which is the origin of the name "bubonic" plague Person-to-person respiratory transmission (primary pneumonic plague) is common in the US OOOO

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Immunology

Immunology is the division of science involved with the immune reactions occurring in living organisms. The organisms are accustomed to evolving internal defense mechanisms to evade the invasion of microbial pathogens. Diverse cells are connected with stimulating the immune responses, which produce inhospitable conditions to the microbes prompting their lysis and thus inhibits the multiplication of the pathogens. The immune system can distinguish the pathogens through the aid of cellular intercommunication and launch responses to destroy them.