Dermatophytes in Animals

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Questions and Answers

Which dermatophyte is commonly associated with both cats and dogs?

  • Microsporum Canis (correct)
  • Trichophyton equinum
  • Trichophyton verrucosum
  • Trichophyton mentagrophytes

What is a primary transmission method for systemic fungal infections caused by yeasts and molds?

  • Using contaminated medical equipment
  • Ingesting contaminated food
  • Direct contact with infected animals
  • Inhaling spores from the environment (correct)

Which of the following dermatophytes is commonly found in horses?

  • Trichophyton mentagrophytes
  • Microsporum Canis
  • Trichophyton equinum (correct)
  • Trichophyton verrucosum

Which of the following is NOT a common symptom of histoplasmosis in dogs?

<p>Skin rashes (A)</p> Signup and view all the answers

What dermatophyte is associated with all ruminant species?

<p>Trichophyton verrucosum (C)</p> Signup and view all the answers

How do fungal spores typically travel within the body once inhaled?

<p>Via the bloodstream (C)</p> Signup and view all the answers

Which of the following groups is considered rare for dermatophyte appearance?

<p>All other animals (D)</p> Signup and view all the answers

What symptom indicates possible internal organ involvement in dogs suffering from histoplasmosis?

<p>Cough (D)</p> Signup and view all the answers

Which dermatophyte is noted for being associated with small rodents and dogs?

<p>Trichophyton mentagrophytes (A)</p> Signup and view all the answers

Which of the following describes a possible method of transmission for yeasts and molds aside from inhalation?

<p>Consumption of contaminated food (B)</p> Signup and view all the answers

What is a common characteristic of Trichophyton colonies?

<p>Whitish-brown, cotton-like to dusty appearance (C)</p> Signup and view all the answers

What is the primary method of infection for Histoplasma capsulatum?

<p>Ingestion or inhalation of spores (B)</p> Signup and view all the answers

What is required for a direct smear infection to occur?

<p>Direct contact with infected individuals or animals (B)</p> Signup and view all the answers

Where does Histoplasma capsulatum primarily thrive?

<p>In soil contaminated with feces from bats and birds (A)</p> Signup and view all the answers

Which method is NOT commonly used to detect a Histoplasma capsulatum infection?

<p>Skin biopsies (C)</p> Signup and view all the answers

What is considered an indirect smear infection?

<p>Infection through sharing personal items like towels (D)</p> Signup and view all the answers

What is a common duration for treatment with oral antifungal medications for this infection?

<p>Six months (C)</p> Signup and view all the answers

Which of the following best describes macroconidia of Trichophyton under a microscope?

<p>Spindle-shaped and rounded (D)</p> Signup and view all the answers

How might dogs typically become exposed to Histoplasma capsulatum?

<p>Digging in the ground (A)</p> Signup and view all the answers

How does a dermatophyte transmission commonly occur?

<p>Via a smear infection (D)</p> Signup and view all the answers

What factor does NOT directly contribute to the development of foot fungus?

<p>Healthy immune system balance (A)</p> Signup and view all the answers

Which of the following contributes to the risk of developing secondary mycoses?

<p>Impaired blood circulation (B)</p> Signup and view all the answers

How does excessive washing affect the skin's ability to defend against fungal infections?

<p>It disrupts the acid mantle (A)</p> Signup and view all the answers

Which environment is most conducive to the growth of fungi?

<p>Moist and warm conditions (D)</p> Signup and view all the answers

What is the role of the endogenous functional state in fungal infections?

<p>It influences the immune system response (D)</p> Signup and view all the answers

What is the primary function of Wood's Lamp in diagnosing M. Canis?

<p>To emit long-wave ultraviolet light for detection (A)</p> Signup and view all the answers

Which method involves collecting skin or hair samples from a patient?

<p>Fungal Culture Examination (C)</p> Signup and view all the answers

Which diagnostic method is least invasive when diagnosing M. Canis?

<p>Wood's Lamp (C)</p> Signup and view all the answers

What does a trichogram specifically examine in the context of diagnosing M. Canis?

<p>The microscopic structure of hair (B)</p> Signup and view all the answers

Which of the following methods would you expect to involve a surgical procedure?

<p>Biopsy (A)</p> Signup and view all the answers

What are systemic mycoses?

<p>Fungal infections that infect the inner body (D)</p> Signup and view all the answers

Which of the following is NOT a type of systemic fungal infection?

<p>Dermatophytosis (B)</p> Signup and view all the answers

How do systemic fungal infections spread throughout the body?

<p>Through the bloodstream (D)</p> Signup and view all the answers

Which of the following fungi primarily affects the lungs and skin?

<p>Blastomyces (D)</p> Signup and view all the answers

Which statement about systemic mycoses is true?

<p>They can be caused by a variety of fungi. (A)</p> Signup and view all the answers

What is the primary nutritional strategy used by saprophytic fungi?

<p>They decompose and feed on dead organic matter. (A)</p> Signup and view all the answers

Which type of fungi is known for forming beneficial relationships with plant roots?

<p>Symbiotic fungi (C)</p> Signup and view all the answers

How does mycosis technically differ from a fungal infection?

<p>Mycosis refers specifically to the growth of fungi on living tissue. (D)</p> Signup and view all the answers

What is a possible consequence of parasitic fungi on their host organisms?

<p>They can harm the host, potentially leading to its death. (B)</p> Signup and view all the answers

Which of the following is an example of a parasitic fungus?

<p>Root rot fungus (A)</p> Signup and view all the answers

What is the primary role of Saccharomyces yeast in the production of alcoholic beverages?

<p>To produce alcohol and carbon dioxide from sugar (A)</p> Signup and view all the answers

Which type of bacteria is primarily associated with sourdough fermentation?

<p>Lactic acid bacteria (C)</p> Signup and view all the answers

What effect does noble rot caused by Botrytis cinerea have on grapes?

<p>It causes water loss, increasing sugar concentration (C)</p> Signup and view all the answers

In which processes are various yeast species particularly important for dairy products?

<p>Ripening of cultured dairy products and cheese (B)</p> Signup and view all the answers

What distinguishes pure cultures of yeast from naturally occurring yeasts in winemaking?

<p>Naturally occurring yeasts are often used on grape skins (D)</p> Signup and view all the answers

What type of infections are predominantly caused by Trichophyton species?

<p>Hair, skin, and nail infections (B)</p> Signup and view all the answers

Which of the following Trichophyton species is specifically endemic to regions such as Pacific Islands and Southeast Asia?

<p>T. concentricum (A)</p> Signup and view all the answers

What is the primary mode of transmission for dermatomycosis caused by Trichophyton species?

<p>Direct and indirect transmission including through inanimate objects (A)</p> Signup and view all the answers

Which Microsporum species is most commonly linked to 'vacation dermatophytosis'?

<p>M. canis (D)</p> Signup and view all the answers

Which of the following is NOT a common species of Trichophyton?

<p>T. odori (B)</p> Signup and view all the answers

Flashcards

Microsporum Canis

A common fungal infection in cats and dogs, known to cause ringworm.

Trichophyton mentagrophytes

A common fungal infection affecting dogs and small rodents, leading to skin lesions.

Trichophyton verrucosum

A common fungal infection in all ruminant animals causing ringworm.

Trichophyton equinum

A type of fungal infection specifically found in horses.

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Rare Dermatophytes

Dermatophytes not commonly seen in most animals, but can occur in rare cases.

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Wood's Lamp

A special fluorescent lamp emitting long-wave ultraviolet light. It's used to detect Microsporum canis infection on skin.

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Fungal Culture Examination

A sample of infected skin or hair is collected and grown on a petri dish. The presence of Microsporum canis is confirmed by observing the resulting colonies.

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Trichogram/Microscopic Examination

Tiny hairs or other bodily materials are collected and examined under a microscope to find Microsporum canis spores.

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Biopsy

A small sample of infected tissue is taken for examination. This helps confirm the diagnosis of Microsporum canis.

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Diagnosing Microsporum canis (M. Canis)

A group of methods used to diagnose the presence of Microsporum canis infection. Helps determine if there's a fungal infection on your skin.

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Yeast

Yeasts are single-celled fungi belonging to the Saccharomyces genus, notably Saccharomyces cerevisiae (baker's yeast), known for their role in fermentation and various industries.

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Alcoholic fermentation

Yeast converts sugar into alcohol and carbon dioxide through a process called alcoholic fermentation.

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Sourdough

Sourdough bread involves a combination of lactic acid bacteria and yeast, contributing to its unique flavor and texture.

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Noble Rot

The fungus Botrytis cinerea causes noble rot on grapes, increasing sugar concentration and influencing wine production.

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Yeast in Dairy

Yeast species are crucial in the ripening process of dairy products, particularly cultured dairy products and cheese.

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Diagnosing Trichophyton

A type of fungus causing skin infections, characterized by whitish-brown, cotton-like colonies and spindle-shaped macroconidia under the microscope.

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Dermatophyte Transmission

A way dermatophytes spread, through a smear, like a tiny brush, from an infected person or animal.

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Direct Smear Infection

Direct contact with an infected person or animal causes this type of transmission.

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Indirect Smear Infection

Contact with contaminated objects, such as a shared comb or towel, leads to this type of infection.

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Microscopic Examination for Fungus

A microscopic examination where the presence of the fungus is confirmed based on the appearance of its spores.

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What are systemic mycoses?

These fungal infections affect the internal organs of the body and spread through the bloodstream.

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What are the three main types of fungi that cause infections?

Dermatophytes, yeasts, and molds are the three types of fungi that cause infections.

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Name some examples of systemic fungal infections.

Aspergillosis, histoplasmosis, cryptococcosis, and blastomycosis are examples of systemic fungal infections.

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What's so special about systemic fungal infections?

Systemic fungal infections are less common but can be very dangerous, potentially leading to serious complications.

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How do systemic fungal infections spread?

Systemic fungal infections are characterized by the spread of fungi through the bloodstream to internal organs.

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Histoplasmosis

A fungal infection caused by Histoplasma capsulatum spores found in soil, typically from bird or bat droppings.

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Histoplasma capsulatum spores

Spores of the fungus Histoplasma capsulatum that cause histoplasmosis.

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Dog exposure to Histoplasma capsulatum

How Histoplasma capsulatum spores are commonly spread to dogs, often by digging in soil containing infected droppings.

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Histoplasmosis detection methods

Methods used to detect Histoplasma capsulatum infection, including blood and urine tests, X-rays, and stool samples.

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Histoplasmosis treatment

Treatment options for Histoplasma capsulatum infection, often involving oral antifungal medications for an extended period.

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How systemic fungal infections occur

Systemic fungal infections occur when microscopic spores from yeasts and molds are inhaled, spread through the bloodstream, and infect internal organs.

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Histoplasmosis in dogs

Histoplasmosis is a fungal infection in dogs that can cause symptoms like fever, weight loss, lethargy, diarrhea, and coughing.

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Fever in histoplasmosis

Fever is a common symptom of histoplasmosis, indicating the dog's body is fighting off the infection.

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Weight loss in histoplasmosis

Histoplasmosis can cause weight loss in dogs as the infection disrupts their ability to eat and absorb nutrients.

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Lethargy and depression in histoplasmosis

Lethargy and depression are common signs of histoplasmosis, indicating weakness and lack of energy in the infected dog.

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Dermatomycosis (Zoonosis)

A type of skin infection caused by a fungus that can spread from animals to humans.

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Balance between Fungus and Immune System

The balance between the fungus's ability to attack and the host's immune system determines the severity of the infection.

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Aggressive Fungi and Immune Response

Certain types of fungi can infect even healthy tissue, but a strong immune system can limit their spread.

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Over-Hygiene and Skin Protection

Excessive cleaning, especially with soaps, can damage the skin's natural protective barrier, making it more vulnerable to fungal infections.

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Moist Environments and Fungal Growth

Fungal infections thrive in warm, moist environments, like between toes, making proper hygiene crucial for prevention.

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Parasitic Fungi

Fungi that obtain nutrients from a living host organism, often causing harm. They act like tiny thieves stealing from their host.

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Mycorrhizae

A close relationship between fungi and plant roots, where the fungus helps the plant absorb water and minerals while taking organic materials for itself.

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Saprophytic Fungi

Fungi that break down dead organic matter, returning nutrients to the environment. They are like nature's recyclers.

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Mycosis

A fungal infection or disease, caused by molds or yeasts growing on living tissue.

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Fungal Infection

The state of being infected by a fungus, often causing disease. Think of it like a tiny invader taking up residence in your body.

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What are dermatophytes?

These fungi infect the skin, hair, and nails, causing conditions like ringworm and athlete's foot.

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How do dermatophytes spread?

Dermatophytes spread through direct contact with infected individuals or animals, as well as indirectly via contaminated objects.

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What is Microsporum?

This genus of fungi is a common cause of skin infections in both humans and animals, particularly in areas with a warm and humid climate.

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What is Trichophyton?

This genus is a major cause of skin, hair, and nail infections in humans and animals, and some species are found worldwide.

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What is a characteristic feature of dermatophytes?

These fungi are known to break down keratin, a protein found in skin, hair, and nails, allowing them to establish an infection.

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Study Notes

Dermatophytes in different animals

  • Microsporum Canis: Frequent in cats, dogs, and some rodents
  • Trichophyton mentagrophytes: Frequent in dogs, rodents, and some other animals
  • Trichophyton verrucosum: Frequent in dogs, and rodents
  • Trichophyton equinum: Frequent in horses
  • Other Dermatophytes: Rare in other animals

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