A cross-sectional study of bluetongue virus and Mycoplasma bovis infections in dairy cattle: II. The association between a positive antibody response and reproduction performance

1990 ◽  
Vol 14 (6) ◽  
pp. 471-480 ◽  
Author(s):  
I. J. Uhaa ◽  
H. P. Riemann ◽  
M. C. Thurmond ◽  
C. E. Franti
Keyword(s):  
Antibody Response ◽  
Dairy Cattle ◽  
Bluetongue Virus ◽  
Cross Sectional Study ◽  
Mycoplasma Bovis ◽  
Sectional Study ◽  
Cross Sectional ◽  
Positive Antibody ◽  
Reproduction Performance ◽  
Positive Antibody Response

Cross-sectional study of bluetongue virus serotype 8 infection in South American camelids in Germany (2008/2009)

2012 ◽  
Vol 160 (1-2) ◽  
pp. 35-42 ◽  
Author(s):  
Claudia Schulz ◽  
Michael Eschbaumer ◽  
Mario Ziller ◽  
Regula Wäckerlin ◽  
Martin Beer ◽  
...  
Keyword(s):  
Bluetongue Virus ◽  
Cross Sectional Study ◽  
South American ◽  
Sectional Study ◽  
Cross Sectional ◽  
South American Camelids ◽  
Virus Serotype

scholarly journals Long-Term Duration of Antibody Response to SARS CoV-2 in One of the Largest Slums of Buenos Aires

2021 ◽  
Author(s):  
Vanina Pagotto ◽  
Lorena Luna ◽  
Julieta Salto ◽  
Magdalena Wagner Manslau ◽  
Silvana Figar ◽  
...  
Keyword(s):  
Antibody Response ◽  
Buenos Aires ◽  
Humoral Response ◽  
Cross Sectional Study ◽  
Older Individuals ◽  
Sectional Study ◽  
Cross Sectional ◽  
The People ◽  
Igg Level

AbstractThe durability of the antibody response following severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections has not been fully elucidated. We have performed a cross-sectional study in one of the largest slums of Buenos Aires, Barrio Padre Mugica in June 2020, detecting a seroprevalence of 53.4%. To evaluate the persistence of the humoral response against SARS-CoV-2 in this area, we designed a second study assessing only the people that were IgG positive in the first survey. The IgG levels against the full spike (S) protein in 175 individuals that were seropositive, at least 6 months before, were evaluated in a second survey. The positivity rate was 92.0%, 161 from 175 individuals remained IgG positive. We observed a contraction in the overall IgG levels measured by ELISA. The median IgG dropped 62% from June to December 2020. Most of the individuals tested (87%) reported to be asymptomatic or oligo-symptomatic. No difference was found between men and women, but people aged less than 50 showed a lower IgG level in each period compared to older individuals. Our data indicate sustained humoral immunity for at least 6 months in a specific socio-economical setting in a population that was mainly asymptomatic for COVID-19.

scholarly journals Prevalence and Risk Factors Associated With Antimicrobial Resistance in Bacteria Related to Bovine Respiratory Disease—A Broad Cross-Sectional Study of Beef Cattle at Entry Into Canadian Feedlots

2021 ◽  
Vol 8 ◽  
Author(s):  
Sara Andrés-Lasheras ◽  
Reuben Ha ◽  
Rahat Zaheer ◽  
Catrione Lee ◽  
Calvin W. Booker ◽  
...  
Keyword(s):  
Antimicrobial Resistance ◽  
Beef Cattle ◽  
Respiratory Disease ◽  
Bovine Respiratory Disease ◽  
Cross Sectional Study ◽  
Mannheimia Haemolytica ◽  
Mycoplasma Bovis ◽  
Sectional Study ◽  
Cross Sectional ◽  
Histophilus Somni

A broad, cross-sectional study of beef cattle at entry into Canadian feedlots investigated the prevalence and epidemiology of antimicrobial resistance (AMR) in Mannheimia haemolytica, Pasteurella multocida, Histophilus somni, and Mycoplasma bovis, bacterial members of the bovine respiratory disease (BRD) complex. Upon feedlot arrival and before antimicrobials were administered at the feedlot, deep nasopharyngeal swabs were collected from 2,824 feedlot cattle in southern and central Alberta, Canada. Data on the date of feedlot arrival, cattle type (beef, dairy), sex (heifer, bull, steer), weight (kg), age class (calf, yearling), source (ranch direct, auction barn, backgrounding operations), risk of developing BRD (high, low), and weather conditions at arrival (temperature, precipitation, and estimated wind speed) were obtained. Mannheimia haemolytica, P. multocida, and H. somni isolates with multidrug-resistant (MDR) profiles associated with the presence of integrative and conjugative elements were isolated more often from dairy-type than from beef-type cattle. Our results showed that beef-type cattle from backgrounding operations presented higher odds of AMR bacteria as compared to auction-derived calves. Oxytetracycline resistance was the most frequently observed resistance across all Pasteurellaceae species and cattle types. Mycoplasma bovis exhibited high macrolide minimum inhibitory concentrations in both cattle types. Whether these MDR isolates establish and persist within the feedlot environment, requires further evaluation.

Cross-sectional study of the G and P genotypes of rotavirus A field strains circulating in regularly vaccinated dairy cattle herds

2018 ◽  
Vol 51 (4) ◽  
pp. 887-892 ◽  
Author(s):  
Juliana T. T. Fritzen ◽  
Elis Lorenzetti ◽  
Marcos V. Oliveira ◽  
Vinicius R. Bon ◽  
Henderson Ayres ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Rotavirus A ◽  
Cattle Herds
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