| further observations on infections of guinea pigs with venezuelan encephalitis virus strains. | guinea pigs from a guatemalan colony died after subcutaneous inoculating of moderately small doses of equine-benign strains of venezuelan encephalitis (ve) virus of hemagglutination-inhibition subtype i-e from enzootic habitats in mexico and guatemala. thus these guinea pigs were unlike english short hair and inbred 13 guinea pigs, which usually survive infections with equine-benign ve strains of subtype i-e. we therefore caution others that not all strains of guinea pigs can be used to evaluate ... | 1979 | 464194 |
| the role of small animal species in nutrition and food production. | | 1976 | 1036089 |
| vector incompetency: its implication in the disappearance of epizootic venezuelan equine encephalomyelitis virus from middle america. | | 1986 | 3950927 |
| ecologic observations of venezuelan encephalitis virus in vertebrates and isolations of nepuyo and patois viruses from sentinel hamsters at pacific and atlantic habitats in guatemala, 1968-1980. | la avellana and puerto barrios, two enzootic foci of venezuelan encephalitis (ve) virus on the pacific and caribbean lowlands (respectively) of guatemala have been studied over a 13-year period. data from sentinel hamsters and guinea pigs and wild and domestic vertebrates are reported. ve virus strains were isolated from hamsters each period they were exposed during the rainy seasons 1968-1980 and at the end of the dry season 1974. rates of isolation of ve virus ranged from 0.2%-5.7% hamster/day ... | 1985 | 4025694 |
| studies of patois group arboviruses in mexico, guatemala, honduras, and british honduras. | | 1972 | 4400811 |
| interactions of nutrition and infection. | | 1968 | 4976616 |
| observations of equines, humans and domestic and wild vertebrates during the 1969 equine epizootic and epidemic of venezuelan encephalitis in guatemala. | | 1972 | 5062308 |
| genetic structure and epidemiology of ascaris populations: patterns of host affiliation in guatemala. | in guatemalan villages people commonly rear pigs, and both hosts may be infected with ascaris. this study was designed to ask whether both humans and pigs are potential hosts in a single parasite transmission cycle in such villages, or alternatively, if there are two separate transmission cycles, one involving pigs and one involving human hosts. parasites were collected from both host species from locations in the north and south of guatemala. allelic variation in the nuclear genome of ascaris w ... | 1993 | 7901831 |
| mass chemotherapy for intestinal taenia solium infection: effect on prevalence in humans and pigs. | mass treatment of the human population with niclosamide was carried out in 2 villages in rural guatemala where taenia solium was endemic, to determine how this would affect the epidemiology of the parasite. intestinal taeniasis was diagnosed by microscopy and coproantigen testing, and porcine cysticercosis by a specific western blot. before mass treatment, the prevalence of human taeniasis was 3.5%; 10 months after treatment it was 1%, a significant decrease (p < 10(-4)). all tapeworms that coul ... | 1997 | 9463679 |
| genetic variation in sympatric ascaris populations from humans and pigs in china. | it has recently been shown using genetic markers that ascaris in humans and pigs in central america comprise reproductively isolated populations. we present a similar analysis for a region of china in which close association between pigs and humans has been the norm for thousands of years, and agricultural practices will result in frequent exposure to eggs from both sources. dna fragments from selected regions of mitochondrial and ribosomal dna were amplified by pcr and allelic forms identified ... | 1998 | 9820857 |
| neurocysticercosis in an italian traveler to latin america. | neurocysticercosis is rarely reported in short-term travelers, although the disease remains a major public health problem in tropical regions. we present a case of neurocysticercosis that was probably acquired by ingestion of taenia solium eggs contained in the stomach of a pig butchered by the traveler. complete clinical resolution was obtained by medical treatment, underlying the importance of early suspicion and diagnosis of the disease. | 1999 | 10072146 |
| discovery and geographic distribution of venezuelan encephalitis virus in guatemala, honduras, and british honduras during 1965-68, and its possible movement to central america and méxico. | | 1970 | 4393224 |
| anticandidal activity of plants used for the treatment of vaginitis in guatemala and clinical trial of a solanum nigrescens preparation. | an ethnobotanical survey detected 71 plants used for the treatment of vaginitis by traditional healers, health promoters and midwives. extracts prepared by maceration of plants in 50% methanol were impregnated on absorbent paper disks and placed over plates with candida albicans. eight (11.3%) of these plants showed some degree of inhibition. solanum nigrescens was chosen for further studies. a cream containing a 50% ethanolic maceration was applied daily to the vagina of female guinea pigs for ... | 1988 | 3292844 |
| search for persistent epizootic venezuelan encephalitis virus in guatemala, el salvador and nicaragua during 1970-1975. | evidence was sought during 1970-1975 of persistence of equine-virulent venezuelan encephalitis (ve) virus in regions of central america that were heavily involved in the epidemic-equine epizootic of 1969. (a) four sentinel horses were exposed in an arid, upland region of the atlantic drainage of guatemala during august-october 1970, but no horse became infected. (b) the epicenter region of the 1969 outbreak, in southwestern guatemala and southwestern el salvador, was studied during july 1970-feb ... | 1976 | 7139 |
| epidemiology of taenia solium taeniasis and cysticercosis in two rural guatemalan communities. | taenia solium taeniasis and cysticercosis are known to be endemic in guatemala but no studies had been undertaken in rural communities where transmission was thought to occur. two adjacent communities, quesada and el jocote, in the department of jutiapa were selected. the former had considerably better sanitary infrastructure than the latter. the seroprevalence of antibodies detected in humans by immunoblot to t. solium metacestode glycoprotein antigens was 10% and 17% and the prevalence of inte ... | 1996 | 8842116 |
| mitochondrial dna and ascaris microepidemiology: the composition of parasite populations from individual hosts, families and villages. | patterns of genetic subdivision in parasite populations can provide important insights into transmission processes and complement information obtained using traditional epidemiological techniques. we describe mitochondrial sequence variation in 265 ascaris collected from 62 individual hosts (humans and pigs) from 35 households in 3 guatemalan locations. restriction mapping of individual worms revealed 42 distinct mitochondrial genotypes. we ask whether the mitochondrial genotypes found in worms ... | 1995 | 7885740 |
| the aba-1 allergen of ascaris lumbricoides: sequence polymorphism, stage and tissue-specific expression, lipid binding function, and protein biophysical properties. | the aba-1 protein of ascaris lumbricoides (of humans) and ascaris suum (of pigs) is abundant in the pseudocoelomic fluid of the parasites and also appears to be released by the tissue-parasitic larvae and the adult stages. the genes encoding the polyprotein precursor of aba-1 (aba-1) were found to be arranged similarly in the two taxa, comprising tandemly repeating units encoding a large polyprotein which is cleaved to yield polypeptides of approximately 15 kda which fall into 2 distinct classes ... | 2000 | 10726282 |