Bacteriología - Gran Negativo

Question 1

What type of bacteria is Campylobacter jejuni?

Answer 1

Bacilos Gram negativos curvos > rojo- rosa (tinción de gram)

Question 2

What disease is caused by Campylobacter jejuni?

Answer 2

Gastroenteritis, diarrea sangrienta

Question 3

How is Campylobacter jejuni transmitted?

Answer 3

Alimentos carnes (aves de corral), leche no pasteurizada y agua contaminada

Question 4

What are the growth conditions for Campylobacter jejuni?

Answer 4

Crece a 42 °C en 48-72 hrs, atmosfera microaerófila (oxígeno 5-7%, CO2 5-10% y el resto nitrógeno, H baja)

Question 5

What are the virulence factors of Campylobacter jejuni?

Answer 5

Motilidad mediada por flagelo, adherencia bacteriana a la mucosa intestinal, capacidad invasiva y producción de toxinas

Question 6

What are the susceptibility tests results for Campylobacter jejuni?

Answer 6

Resistente a cefepima y susceptible a ácido nalidíxico

Question 7

What are the culture media used for Campylobacter jejuni?

Answer 7

Agar Skirrow, Agar Campy-BAP, Agar Preston, Agar Butzler (selectivo)

Question 8

What disease is caused by Vibrio cholerae?

Answer 8

Cólera

Question 9

What is the transmission route for Vibrio cholerae?

Answer 9

Fecal-oral, alimentos contaminados, mal cocinados, agua contaminada, moscas y zonas de desastre

Question 10

What are the growth conditions for Vibrio cholerae?

Answer 10

Crece a 35 °C, 24-48 hrs de incubación, gram (-) y se observan cortos y curvos

Question 11

What are the virulence factors of Vibrio cholerae?

Answer 11

Toxina colérica, pilus corregulado por la toxina, proteína quimiotáctica, enterotoxina colérica accesoria, toxina zónula, oclusiva y neuraminidasa

Question 12

What disease is caused by Helicobacter pylori?

Answer 12

Gastritis, úlceras y adenocarcinoma

Question 13

What is the transmission route for Helicobacter pylori?

Answer 13

Contacto directo con saliva, vómito o heces

Question 14

What are the growth conditions for Helicobacter pylori?

Answer 14

Crece en caldos nutritivos, añadiendo NaCl presentando turbidez

Question 15

What disease is caused by Mycobacterium tuberculosis?

Answer 15

Tuberculosis (80% pulmonar y 20% extrapulmonar), tos productiva, fiebre y pérdida de peso

Question 16

What is the transmission route for Mycobacterium tuberculosis?

Answer 16

Aerosoles (hablar, toser, estornudar…)

Question 17

What are the growth conditions for Mycobacterium tuberculosis?

Answer 17

Crece en 2 semanas a 35 °C, sus colonias son grisáceas y tras 5 días de incubación son pequeñas

Question 18

What are the virulence factors of Mycobacterium tuberculosis?

Answer 18

Flagelos, ureasa, fosfolipasa, mucinas, toxinas vacuolizantes A (VacA) y citotoxinas (CagA)

Question 19

What are the culture media used for Mycobacterium tuberculosis?

Answer 19

Agar Casman, agar sangre carnero, agar brucella con sangre > colonias muy pequeñas, incubación 2 semanas 35 °C