33 Questions
Which type of alopecia is characterized by direct damage to the hair follicle unit, resulting in the loss of the whole hair follicle unit?
True alopecia
What is the most common cause of hair loss due to alopecia?
Hair follicle inflammation
Which phase of the hair growth cycle is characterized by a prolonged resting phase?
Telogen phase
Which of the following is NOT a mechanism of primary alopecia?
Shortened Telogen phase
In which species is ringworm not very common?
Dogs
Which of the following is a common cause of hair loss in dogs?
Hair follicle inflammation
Which type of alopecia is characterized by the hair shaft being damaged but not lost from the hair follicle unit?
Apparent alopecia
Which of the following is a rare cause of alopecia characterized by the hair never growing?
Congenital aplasia
Which species is demodicosis and pyoderma very common in?
Dogs
Which of the following is a common cause of alopecia in immature animals?
Demodicosis
Which of the following is a breed predisposed to hyperadrenocorticism (HAC)?
Small terriers
Which breed is predisposed to recurrent flank alopecia?
Boxers
Which breed is predisposed to demodicosis?
Staffies
Which of the following is a common cause of alopecia in middle-aged or older animals?
Endocrinopathies
Which of the following is a common cause of alopecia in entire female guinea pigs?
Ovarian neoplasia
Which of the following is a common cause of alopecia in entire male dogs?
Sertoli cell tumours
Which of the following is a suggestive sign of hypothyroidism in dogs?
Weight gain, lethargy
Which of the following tests is commonly used to diagnose demodicosis?
Skin scrapings
What are some common causes of alopecia in immature animals?
Infections (demodicosis/ dermatophytosis/ superficial pyoderma) are common causes of alopecia in immature animals.
What are some common causes of alopecia in middle-aged or older animals?
Endocrinopathies, neoplasia, and demodicosis are common causes of alopecia in middle-aged or older animals.
Which breed is predisposed to hyperadrenocorticism (HAC)?
Small terriers and boxers are predisposed to hyperadrenocorticism (HAC).
Which breed is predisposed to recurrent flank alopecia?
Boxers and bulldogs are predisposed to recurrent flank alopecia.
Which breeds are susceptible to demodicosis?
Demodicosis is common in Staffies, bulldogs, and Shar Peis.
Explain the difference between primary and secondary alopecia.
Primary alopecia refers to the failure of hair to grow normally, while secondary alopecia refers to hair that initially grows normally but is subsequently damaged or lost.
What is the difference between true alopecia and apparent alopecia?
True alopecia involves direct damage to the hair follicle unit, resulting in the loss of the entire hair follicle unit. Apparent alopecia, on the other hand, refers to hair shafts that are damaged but not lost from the hair follicle unit.
What are the mechanisms of primary alopecia?
The mechanisms of primary alopecia include lack of stimulation during the anagen phase, abnormal growth factors during the anagen phase leading to miniaturized or dysplastic hairs that break off or shed, and a prolonged resting phase called the telogen phase.
What are the common causes of alopecia?
Common causes of alopecia include congenital aplasia (rare), hair follicle inflammation (the most common cause), hair cycle abnormality (e.g., endocrine-related), and hair morphological abnormalities (e.g., malformed hair that breaks off).
In which species are ringworm, demodicosis, and pyoderma commonly found?
Ringworm is very common in cattle, horses, cats, and hedgehogs. Demodicosis and pyoderma are both very common in dogs.
What are some common causes of alopecia in middle-aged or older animals?
Endocrinopathies, neoplasia, demodicosis
What are some common causes of alopecia in immature animals?
Infections (demodicosis/ dermatophytosis/ superficial pyoderma), congenital alopecia
What are the mechanisms of primary alopecia?
Direct damage to the hair follicle unit, resulting in the loss of the whole hair follicle unit.
Which type of alopecia is characterized by the hair shaft being damaged but not lost from the hair follicle unit?
Apparent alopecia
Which of the following is a common cause of alopecia in entire female guinea pigs?
Ovarian neoplasia
Test your knowledge on the different types and mechanisms of alopecia with this quiz. Learn about primary and secondary alopecia, true and apparent alopecia, and the various ways in which hair follicles can be damaged or lost. Challenge yourself and expand your understanding of this condition.
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