The word pullicologist means some one that is an expert on fleas.
pullicologist
It seems like you may be referring to a misspelling of the term "pulmonologist." A pulmonologist is a medical doctor who specializes in the diagnosis and treatment of diseases and disorders of the respiratory system, including the lungs and airways. They are trained to manage conditions such as asthma, chronic obstructive pulmonary disease (COPD), pneumonia, and lung cancer. Pulmonologists often work closely with other healthcare professionals to provide comprehensive care for patients with respiratory issues.