Vibrio cholerae - Study guides, Class notes & Summaries

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Vibrio cholerae correct answers Gram negative comma-shaped & flagellated rods. 2 chromosomes, pH sensitive, halophilic, oxidase +. 2-3d incubation; produces rice water stools with dehydration (sunken eyes and cool skin). Electrolyte imbalance leads to muscle cramps. CT is a complex A-B toxin; A subunit translocates to ADP ribosylate the Gs subunit. cAMP levels rise, leading to water loss. Quorum sensing influences expression of virulence. At low density LuxO-P activates sRNAs that target HapR, t...

In suspected cases of brucellosis, the optimal specimen to be collected for the isolation of the etiologic agent is A. Blood B. Urine C. Cerebrospinal fluid D. Nasopharyngeal exudates correct answers A. The etiologic agents of brucellosis are the brucellae, which are small, nonmotile, gramnegative coccobacilli that are facultative intracellular parasites. Isolation of these organisms is difficult. In suspected cases, which are generally job related, multiple blood cultures are recommended f...

MMSC 438 EXAM 2 SET Q&A 1. A bloody stool sample is received in the laboratory and plated to routine stool culture media. The following results arerecorded by the laboratory scientist 24 hours after plating the patient sample:Blood agar: beta-hemolytic coloniesMacConkey: Only lactose fermenting colonies are presentSMAC: 2+ clear colonies presentFurther testing reveals: Oxidase negative, indole positive, MUG negative, motileThe most likely identification is: A. Yersinia enterocolitic...

Microbiology Review Practice Test. identify which of the following are external structures used primarily for direct contact interactions with other cells a ) Flagella b) Fimbriae c) Cilia d) Pili - CORRECT ANSWER PILI, Fimbriae Which of the following describes movement towards or away from light ? 1) Phototaxis 2)Chemotaxis - CORRECT ANSWER Phototaxis Which of the following bored through the stomach lining and causes gastric ulcers? a) Klebsiella pneumoniae B) Streptococcus...

Microbiology - A branch of biology, that deals with all members of the microbial world Classes of Microbiology - Bacteria, Fungi, Protozoa, Algae and "viruses." Beneficial Bacteria - The majority of the bacteria are beneficial. Only about 3% are harmful. Examples of benefits we get from bacteria and fungi include - Bacteria and fungi decay organic matter. Most antibiotics are made by bacteria and fungi. Normal flora contribute to health. Intestinal bacteria are involved in pr...

Each of the following is inoculation of normal biota to a newborn except _______. Select one: a. All of the choices are correct. b. breastfeeding c. the birth process through the birth canal d. contact with hospital staff e. bottle feeding Which of the following is transmission of disease from mother to fetus? Select one: a. Droplets b. Vector c. Fomites d. Direct e. VerticalAn infectious agent already existing on or in the body is called ______. Select one: a. an enterotoxin b. ...

MICROBIOLOGY EXAM 1 WITH COMPLETE SOLUTIONS 100% One important ability that all cells must have to survive is maintaining a relatively stable internal environment. This is called: - correct answer homeostasis __________ microscopy uses UV light to excite electrons to a higher energy level. - correct answer fluorescence Which scientists were the developers of the cell theory that all organisms are made of cells? - correct answer Schleiden and Schwann All the following are characteris...

BIO 107 EXAM 1 2024 QUESTIONS WITH DETAILED VERIFIED ANSWERS | A+ GRADE ASSURED Environment a collection of systems including all living and nonliving things on Earth that sustain all life system made up of interacting components that produce patterns of behavior over a period of time, like a household ecosystems The environment is made up of many natural systems ecosystem services The process by which natural environments provide lifesupporting resources What roles do models play in te...

What is a significant cause of morbidity and mortality worldwide? Infectious Diseases Cholera An acute intestinal infection TRANSMITTED through ingestion of water or food that is contaminated by feces of infected person. (Oral --> fecal route) *Bacteria that causes it* -Vibrio Cholerae Lyme Disease Caused by bacterial spirochete: Borrelia burgdorferi. -This microorganism can be found in forest animals like squirrels, rodents, and the white tailed deer. What is the role of reverse transc...