Zoonotic Diseases Flashcards
zoonosis v reverse zoonosis
animals -> ppl = zoonosis
ppl -> animals =reverse
about __/10 infectious diseases is zoonotic
6/10
Ringworm is known as
Dermatophytosis
what causes ringworm
fungal organisms; dermatophytes
2 most common=
Trichophyton (usu. livestock)
Microsporum (usu. d/c)
different kinds of Trichophyton dermatophytes and what animals they infect
T. verrucosum: cattle
T. metagrophytes: pigs/ horses
T. equinum: horses
different kinds of Microsporum dermatophytes and what animals they infect
M. Canis: d/c
how dermatophytes are spread
fomites, direct contact, spores remain in soil (grow aerobically)
signs of ringworm
alopecia, circular lesions, crusts on skin w scale and flakes, may or may not have pruritis (itch)
incubation time of dermatophytes and length of dematophytosis (RW)
incubation= 1-6 wks
length 1-4 months
once dermatophyte fungus invades the skin, it grows and appears like a ring. which portion is the most active?
the periphery.
ringworm lesions are often discolored in this animal
pigs
how to treat ringworm
antifungals (ointments, systemics like Griseofuluin)
how to diagnose ringworm
signs, fungal culture (taken from periphery)
use Sarbouad’s medium; inhibits growth, encourages fungal growth, turns pink if +
Salmonellosis is the ____
salmonella is the ____
genus
species
salmonella in humans used to be called
Typhoid fever
how salmonella is spread
found in GI tract of infected, shed thro feces, feces/oral contamination
signs of salmonellosis
diarrhea, w/ or w/o fever, may have septicemia
often fatal
who may shed salmonella bacteria
clinically infected or asymptomatic carriers?
both, stress increases amount shed
what foods should humans be cautious consuming bc of salmonella
meat (may be contaminated after slaughter; GI tract opens), raw milk (possible contamination); cook to kill
raw eggs may have bacteria harbored in ovaries or contaminated shells
about 95% of these animals harbor salmonella in their GI track normally. found in feces and on skin
reptiles
signs of Samonellosis
cattle= higher incidence in young, speticemia, adults may show signs after stress, diarrhea, fever, pain, may abort pigs= diarrheal septicemia
diagnosing salmonellosis
signs, Ab titers, fecal culture
treatment of salmonellosis
drug resistance, nursing care/ rehydration
reduce rodents and birds that may carry feces
