Demographics and Transfer of Escher

Demographics and Transfer of Escherichia coli Within Bos taurus Populations
Joshua Ryan Dillard
In the United States, symptoms caused by pathogenic strains of Escherichia coli
are on the rise. A major source of these pathogenic strains is the E. coli in the digestive
tract of cattle. The purpose of this project was to determine if E. coli are transferred
between individuals of the same species and if interspecies transmission is possible.
Proximity of cattle was also studied as a contributing factor to the transfer of E. coli. To
accomplish this goal, E. coli isolates from cattle and cohabitating ground squirrels were
compared through a new method of bacterial strain typing called pyroprinting. Bulls
from the Cal Poly Bull Test were sampled every summer from May to September when
around 200 bulls from ranches across California are housed together to be tested and
eventually auctioned off. The impact of cattle origin (ranch, city) and habitation (pen) on
E.coli isolate strain type were evaluated via pyroprinting . The cattle were studied to see
if transfer was related to proximity of cohabitation. Since the complete population of
intestinal E. coli could not be sampled, transfer could not be directly seen. The
probability of sharing E. coli in each time point was used to infer transfer. There was an
increase in the probability of sharing E. coli from the May sample date to the September
date, indicating that some form of transfer was occurring. There was an even greater
increase in the probability of sharing E. coli when the bulls were housed in close
proximity. Lastly, ground squirrels cohabitating in the area were found to house some of
the same strains as the cattle. This makes transfer between squirrels and cattle a
v
possibility. Overall, this paper shows that the intestinal E. coli composition of bulls may
be readily altered by the introduction of new bulls into a population.

Kết quả (Anh) 1:

Demographics and Transfer of Escherichia coli Within Bos taurus PopulationsJoshua Ryan DillardIn the United States, the symptoms caused by pathogenic strains of Escherichia coliare on the rise. A major source of these pathogenic strains is the e. coli in the digestivetract of cattle. The purpose of this project was to determine if e. coli are transferredbetween individuals of the same species and if interspecies transmission is possible.Proximity of cattle was also studied as a contributing factor to the transfer of e. coli. Toto accomplish this goal, e. coli isolates from cattle and cohabitating ground squirrels werecompared through a new method of bacterial strain typing called pyroprinting. Bullsfrom the Cal Poly Bull Test were sampled every summer from May to September whenaround 200 bulls from ranches across California are housed together to be tested andeventually auctioned off. The impact of cattle origin (ranch, city) and habitation (pen) onE. coli isolate strain type were evaluated via pyroprinting. The cattle were studied to seeIf the transfer was related to proximity of cohabitation. Since the complete population ofintestinal e. coli could not be sampled, the transfer could not be directly seen. Theprobability of sharing e. coli in each time point was used to infer transfer. There was anincrease in the probability of sharing e. coli from the May sample date to the Septemberdate, indicating that some form of transfer was occurring. There was an even greaterincrease in the probability of sharing E. coli when the bulls were housed in closeproximity. Lastly, ground squirrels cohabitating in the area were found to house some ofthe same strains as the cattle. This makes transfer between squirrels and cattle a vpossibility. Overall, this paper shows that the intestinal e. coli composition of bulls maybe readily altered by the introduction of new bulls into a population.

Kết quả (Anh) 2:

Demographics and Transfer of Bos taurus Populations Within Escherichia coli
Joshua Ryan Dillard
In the United States, caused by pathogenic strains of symptoms Escherichia coli
are on the rise. A major source of pathogenic strains những is the E. coli in the digestive
tract of cattle. The purpose of this project was to quyết E. coli are truyền if
the Individuals of the same species giữa and if interspecies transmission is im possible.
Proximity of cattle was a contributing factor cũng Studied as to the transfer of E. coli. To
Accomplish this goal, E. coli isolates from cattle and ground squirrels cohabitating là
sánh through a new method of bacterial strain typing gọi pyroprinting. Bulls
from the Cal Poly Bull Test sampled every summer from May là to September khi
ranches around 200 bulls from across California are housed together to be tested and
Eventually Auctioned off. The impact of cattle origin (ranch, city) and Habitation (pen) on
E.coli strain isolate Were Evaluated via pyroprinting type. The cattle là Studied to see
if transfer was related to proximity of cohabitation. Since the complete population of
intestinal E. coli could not be sampled, transfer could not be seen trực. The
probability of sharing E. coli in each time point was used to infer transfer. Gặp
tăng in the probability of sharing E. coli samples from the May date to the September
date, some form of transfer có ngụ was occurring. Thậm Gặp greater
probability of sharing tăng in the E. coli là khi bulls housed in close
proximity. Lastly, ground squirrels in the area were found cohabitating to house some of
the same strains as the cattle. This Makes the between squirrels and cattle transfer a
v
Possibility. Overall, this paper shows E. coli intestinal rằng sewing composition of bulls
be readily altered by the introduction of new bulls Into a population.