Micro 20-21

The gram negative bacillus associated with abscesses from cat bites or scratches is

• Salmonella typhimurium

• Yersinia enterocolitica

• Bartonella henselae

• Brucella suis

• Francisella tularensis

Rocky Mountain spotted fever

• Seen in highest numbers along the west coast

• Transmitted by Ixodes ticks

• Symptoms include fever, headache and rash

• Never has severe complications

• All of the choices are correct

All of the following pertain to ehrlichiosis except

• Transmitted by Ixodes ticks

• Diagnosed by PCR or indirect fluorescent assay

• Treatment requires an extensive course of antibiotics

• Symptoms include fever, headache and muscle pains

• Often coinfects with Borrelia burgdorferi

Which is incorrect regarding Q fever?

• Transmitted by lice

• Pathogen produces resistant spores

• Humans infected from unpasteurized milk and airborne spread

• Causes fever, muscle aches, rash and sometimes pneumonia

• Is a zoonosis

Which of the following is mismatched?

• Yersinia pestis - plague

• Coxiella burnetii - Q fever

• Bartonella quintana - trench fever

• Bartonella henselae - cat scratch disease

• Rickettsia typhi - rocky mountain spotted fever

Cat-scratch fever can be prevented by

• Avoiding ticks

• Pasteurizing milk

• Vaccine

• Animal control

• Cleaning the scratch wound

The symptoms that occur in cyclic 48 to 72 hour episodes in a malaria patient are

• Bloody, mucus-filled stools, fever, diarrhea and weight loss

• Fever, swollen lymph nodes and joint pain

• Urinary frequency and pain and vaginal discharge

• Chills, fever and sweating

• Sore throat, low grade fever and swollen lymph nodes

Which is incorrect about malaria?

• Merozoites enter and multiply in liver cells

• Trophozoites develop in RBCs

• The mosquito inoculates human blood with sporozoites

• Gametocytes enter the mosquito as she draws a blood meal from a human

• None of the choices are correct

The cyclic bouts of fever and chills in malaria are caused by

• Liver cell lysis

• White blood cell lysis

• Red blood cell lysis

• Neurological involvement

• None of the choices are correct

Malaria may be prevented by

• Using bed nets sprayed with insecticide

• Eliminating standing water

• Taking prophylactic drugs

• Using interfering RNA in mosquitos

• All of the above are correct