Apatient is exhibiting the following symptoms: fever, cough, dyspnea, prominent gastrointestinal symptoms, absence of buboes. which form of plague is responsible?

Septicemic (or septicaemic) plague is one of the three main forms of plague. It is caused by Yersinia pestis, a gram-negative species of bacterium. Septicemic plague is a life-threatening infection of the blood, most commonly spread by bites from infected fleas.

Like some other forms of gram-negative sepsis, septicemic plague can cause disseminated intravascular coagulation, and is almost always fatal when untreated (the mortality rate in medieval times was 99-100 percent).[citation needed] However, it only occurs in a minority of cases of Yersinia infection, so that fewer than 5,000 people a year acquire the disease. It is in fact the rarest of the three plague varieties; the other forms are bubonic and pneumonic plague.