Question

Pneumonia that infects the lungs alveoli is caused by-
(a)Plasmodium
(b)Salmonella typhi
(c)Haemophilus influenzae
(d)None of the above

Answer 1

Hint: A Gram-negative, coccobacillary, the facultatively anaerobic capnophilic pathogenic bacterium of the Pasteurellaceae family is a (formerly called Pfeiffer's bacillus or Bacillus influenzae) bacterium. Richard Pfeiffer first identified it in 1892, during an influenza pandemic.

Complete answer:
Pneumonia is a severe lung infection that is especially harmful to older adults and young children, affecting people of all ages. Streptococcus pneumonia bacteria or pneumococcus are the main causes of serious pneumonia in children in developing countries. Haemophilus influenzae type b or Hib is another leading cause.
Influenza, staph infections, human respiratory syncytial virus, rhinovirus, herpes simplex virus, and extreme acute respiratory syndrome are other causes of pneumonia.

Additional Information: Plasmodium- is a genus of unicellular eukaryotes that are obligatory vertebrate and insect parasites. In a blood-feeding insect host, the life cycles of Plasmodium species include production that then injects parasites into a vertebrate host during a blood meal.
Salmonella Typhi (S. Typhi-) is a bacteria that infects the blood and the intestinal tract. The condition is known as typhoid fever. S. The bacteria Paratyphi A, B, and C cause a comparable disease that is included under the typhoid heading.
So, the correct answer is ‘Haemophilus influenzae’.

Note: The gram-negative coccobacillus is Haemophilus influenzae type b (Hib). For in vitro development, this respiratory tract membrane obligatory parasite requires hemin (X-factor) and NAD (V-factor). Hib is non-motile and not fast-acid.