Campylobacter jejuni is one of the most common bacterial causes of foodborne gastroenteritis, responsible for between 400-500 million cases annually worldwide. Chemotaxis in C. jejuni has been shown to play an important role in colonization of the intestinal tract and is therefore an important part of the pathogenesis process for this species. A mutant lacking flagella is discovered. Which of the following would best describe this mutant relative to the wild type C. jejuni?

Following from the previous two questions, imagine you set up two cultures of T. denitrificans and measured the growth of each with a spectrophotometer. You provide both cultures with thiosulfate as an electron donor and sodium bicarbonate as the sole source of carbon. In culture A, you provide oxygen as a terminal electron acceptor. In culture B, you provide nitrate (NO3-) as a terminal electron acceptor. Which of the following would you predict best describes the growth of these two cultures?

Genetically engineering a strain of bacteria to make cells unable to produce flagella would most likely ______.

Labrys methylaminiphilus grows on the organic single carbon compound methylamine, CH3NH2, produced during putrefaction as a result of the breakdown of proteins. As such, it can be found growing in sediments at the bottom of lakes. You perform an enrichment culture in the hopes of isolating species of Labrys from a sample of lake sediment. Following growth in your final liquid transfer, it would be best to inoculate samples of your culture onto media in Petri dishes containing methylamine plus any of the following EXCEPT ______.

Use the graph to answer the question(s). Which of the numbered lines represents expiratory reserve volume?   

TMN classification is the system used to classify non-small cell carcinoma?

EXTRA CREDIT A subject referred for pulmonary function tests because of shortness of breath has an FEV1 of 70%. This finding is suggestive of :

Which statements are true regarding epiglottitis? Bacterial Quick onset with drooling Lateral radiograph shows a “thumb sign” Caused by H. influenza B

A subject has an FVC of 1.8 L (39% of predicted); the same individual has a slow VC of 2.7 L. Which of the following might explain these findings: Normal findings in severe restrictive disease Airway compression in obstructive lung disease Poor effort or early termination of the FVC Representative findings in early small airway disease

Which of the following is a more common cause of obstructive sleep apnea?