Ch. 18 - Nervous System Infections

Norman-McKay- Microbiology: Basic and Clinical Principles 2nd Edition

Norman-McKay2nd EditionMicrobiology: Basic and Clinical PrinciplesISBN: 9780137661619Non è quello che usi tu?Cambia libro di testo

Norman-McKay 2nd Edition

Ch. 18 - Nervous System Infections

Problema 10

Capitolo 14, Problema 10

The protists Trypanosoma brucei, Naegleria fowleri, and Toxoplasma gondii
a. invade host cells to cause cellular damage.
b. are only infective in the flagellated form.
c. have a nucleus and are eukaryotic.
d. have all of the above characteristics.

Guida verificata passo dopo passo

Step 1: Understand the nature of the organisms mentioned. Trypanosoma brucei, Naegleria fowleri, and Toxoplasma gondii are all protists, which means they are eukaryotic microorganisms with a nucleus.

Step 2: Analyze whether these protists invade host cells to cause cellular damage. For example, Toxoplasma gondii is known to invade host cells, while Trypanosoma brucei primarily lives in the bloodstream but can cause damage indirectly. Naegleria fowleri invades the brain tissue causing damage.

Step 3: Consider the infective forms of these protists. Determine if they are only infective in their flagellated form. For instance, Trypanosoma brucei is flagellated and infective, but Toxoplasma gondii has multiple forms, not all flagellated.

Step 4: Evaluate if all the above characteristics apply to all three protists collectively. This involves checking if each statement (a, b, and c) is true for all three organisms.

Step 5: Based on the analysis, select the answer that best fits all three protists, understanding that they are eukaryotic with a nucleus, have varying infective forms, and invade host cells to cause damage.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.

Durata del video:

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Protist Cell Structure and Eukaryotic Nature

Protists like Trypanosoma brucei, Naegleria fowleri, and Toxoplasma gondii are eukaryotic organisms, meaning they have a true nucleus and membrane-bound organelles. This distinguishes them from prokaryotes such as bacteria and is fundamental to understanding their biology and pathogenic mechanisms.

Video consigliato:

06:53

Natural Killer Cells

Modes of Infection and Host Cell Invasion

These protists invade host cells to cause damage, which is a key aspect of their pathogenicity. For example, Toxoplasma gondii actively invades host cells, while Naegleria fowleri can penetrate the central nervous system, highlighting their ability to cause cellular and tissue damage.

Video consigliato:

05:38

3) Invasion into Host Tissues

Life Cycle Forms and Infectivity

Many protists have multiple life cycle stages, including flagellated and non-flagellated forms. Infectivity often depends on specific forms; for instance, Trypanosoma brucei is infective in its flagellated trypomastigote stage, emphasizing the importance of understanding which morphological forms are responsible for transmission and infection.

Video consigliato:

01:37

Krebs Cycle

Pratica correlata

Domanda del libro di testo

A patient who has just immigrated to the United States after serving in the Iraqi army is displaying a bruiselike rash, headache, and sensitivity to light. The doctor will immediately recommend administration of

a. ceftriaxone.

b. penicillin.

c. gentamycin.

d. rifampicin.

1121

views

Domanda del libro di testo

An HIV/AIDS patient is presenting with flulike symptoms, headache, fever, and disorientation. The MOST important piece of information a nurse must obtain for the patient is his or her

a. travel history, in and outside the United States.

b. diet for the last 3 days.

c. exposure to lakes or streams.

d. exposure to bats.

1184

views

Domanda del libro di testo

Which of the following symptoms would be most informative in terms of ruling out a prion disease as a differential diagnosis?

a. Nuchal rigidity

b. Hallucinations

c. Fatigue

d. Headache