Blog

Choose all that apply: Normal microbiota is found in humans in/on the

Choose all that apply: Normal microbiota is found in humans in/on the

Match the type of infection to its proper description.

True/False: Few new HIV infections are currently being diagnosed in the US, and HIV is not thought of as a problem anymore in the US by the CDC.

True/False: Few new HIV infections are currently being diagnosed in the US, and HIV is not thought of as a problem anymore in the US by the CDC.

Case study #3 Dental caries (dental decay) is the result of solubilization (dissolving) of tooth enamel by acid. The microbes associated with cavities, usually the Gram-positive Streptococcus mutans and Lactobacillus species living in biofilms as plaque, produce organic acids as the waste product of a specific metabolic pathway. Regular tooth brushing and chewing gum after meals, which increases saliva production, and are the two leading methods that can be preformed daily to prevent tooth decay.   The increased saliva production is a mechanical defense that is triggered by chewing gum. This is part of

Case study #4 Plasmodium falciparum is the most virulent causative agent of malaria. This parasite has a trophozoite form that must undergo a life cycle within the gut of the female Anopheles mosquito to be naturally transmitted to the next host. The parasite also has separate trophozoite forms in the liver and blood of humans. If the malaria parasite is introduced into a pregnant woman, it can cross the placental barrier and infect the developing fetus. People at increased risk for malaria infection are children under 5 years old, pregnant women, and people with AIDS (active HIV infection).   Defend your answer to the previous question – why or why not would chloramphenicol, which binds to the 50S ribosomal subunit, be effective at treating a P. falciparum infection?

Case study #3 Dental caries (dental decay) is the result of solubilization (dissolving) of tooth enamel by acid. The microbes associated with cavities, usually the Gram-positive Streptococcus mutans and Lactobacillus species living in biofilms as plaque, produce organic acids as the waste product of a specific metabolic pathway. Regular tooth brushing and chewing gum after meals, which increases saliva production, and are the two leading methods that can be preformed daily to prevent tooth decay.

Case study #1 NDM-1 is an enzyme that hydrolyzes and inactivates nearly all known β-lactam-class antibiotics. This enzyme requires a metallic ion, usually zinc, to catalyze the hydrolysis reaction. The gene encoding NDM-1 is found on a conjugative plasmid and is efficiently transferred to many Gram negative bacteria.   Which of the following statements about the cell envelope component described in the previous question is true?

EV-D68 can be spread when a healthy person touches a doorknob or countertop that has been contaminated by an infected person’s respiratory secretions. What term best describes the doorknob and countertop contaminated by EV-D68?