| an abattoir monitoring system for diagnosis of tuberculosis in cattle in baja california, mexico. | to implement a disease monitoring system in federal, municipal, and private abattoirs in baja california, mexico and to estimate annual prevalence of tuberculosis (tb) in beef and dairy cattle slaughtered and inspected in 1995 and 1996. | 1997 | 9301739 |
| [distribution of aquatic birds in oxidation lagoons of la paz city in south baja california, mexico]. | taxonomic composition, spatial and temporal distribution of aquatic birds in oxidation lagoons (lo) of la paz city in south baja california, mexico, were determined during 24 censuses realized in two-week intervals (april/98-march/99). there are five lagoons of5 ha each and 17 ha of terrains constantly flooded that serve as feeding areas for cattle and birds. one hundred twenty three species were observed, 75 of which were aquatic birds. a total of 46 041 observations were made (average 1 918 bi ... | 2007 | 19069771 |
| genome-wide identification of copy number variations in holstein cattle from baja california, mexico, using high-density snp genotyping arrays. | copy number variations (cnvs) are an important source of genomic structural variation, and can be used as markers to investigate phenotypic and economic traits. cnvs also have functional effects on gene expression and can contribute to disease susceptibility in mammals. currently, single nucleotide polymorphism genotyping arrays (snp chips) are the technology of choice for identifying cnv variations. microarray technologies have recently been used to study the bovine genome. the objective of the ... | 2015 | 26436509 |
| epidemiology of bovine brucellosis in the mexicali valley, mexico: results of path analysis. | twenty-eight known or hypothesized variables in the epidemiology of bovine brucellosis were examined by path analysis to determine the contribution of each variable to seropositivity of cattle in mexicali, mexico. the variables that contributed significantly to bovine seropositivity were area size of farm premises, percentage of animals on a premises that were inseminated artificially, local marketing of the products from a premises, size of investment in the livestock, whether or not dairying w ... | 1984 | 6476570 |
| epidemiology of bovine brucellosis in the mexicali valley, mexico: literature review of disease-associated factors. | the world literature was searched to document the variables known to affect the initiation, spread, maintenance, and/or control of bovine brucellosis. each variable was classified into 1 of 3 categories, depending upon whether it was related to the animal population, to management, or to the biology of the disease. these variables were documented and categorized as the initial step for a quantitative path analysis on the epidemiology of bovine brucellosis in a defined geographic area in northern ... | 1984 | 6476569 |
| epidemiology of bovine brucellosis in the mexicali valley, mexico: data gathering and survey results. | data for path analysis on the epidemiology of bovine brucellosis were gathered from 184 premises in mexicali valley, mexico, that had dairy cattle, swine, and/or goats. each farmer manager or owner was interviewed, using a pretested set of questions, and the livestock on the premises were serotested for brucella antibodies. the focus in gathering these data was to identify the characteristics of premises with seropositive cattle in comparison with characteristics of premises with no seropositive ... | 1984 | 6433755 |
| seasonal and geographical variation of organochlorine residues in birds from northwest mexico. | eight species of birds (129 individuals) were collected from three agricultural areas with long histories of pesticide use in northwestern mexico. plucked carcasses were analyzed for organochlorine (oc) pesticides and polychlorobiphenyls (pcbs). dde was found in all of the samples and at higher levels than other ocs. mean (geometric) dde concentrations varied from 0.04 (microgram/g) ppm in mourning doves (zenaida macroura) to 5.05 ppm in double-crested cormorants (phalacrocorax auritus). hexachl ... | 1991 | 1722080 |
| papillomatous digital dermatitis on a commercial dairy farm in mexicali, mexico: incidence and effect on reproduction and milk production. | this retrospective study of papillomatous digital dermatitis (pdd) was performed using data for cows that calved between july 1993 and june 1994 on a mexicali, mexico, dairy farm in order to calculate incidence rates, and to compare milk yield and reproduction data between affected and nonaffected dairy cows. a total of 190 out of 577 (33%) cows were affected during lactation and six (1%) during the dry period. fifty-two of 77 (68%) cows that had lesions in the previous lactation and were also p ... | 1997 | 9443334 |