| [isolation of rabies virus from the insectivorous bat myotis nigricans]. | the following is a case study of the natural infection by the rabies virus of an insectiverous bat belonging to the species myotis nigricans in the municipality of ribeirão pires, greater s. paulo. diagnosis was made by means of immunofluorescence and intracerebral innoculation of mice with nervous and intrascapular muscular tissues. | 1995 | 8525324 |
| eimeria from bats of bolivia: two new species from vespertilionid bats. | between 1985 and 1987, fecal samples were collected from 71 bats representing 14 species (desmodontidae, molossidae, noctilionidae, phyllostomidae, vespertilionidae) from 8 localities in 3 states (beni, pando, santa cruz) in bolivia, south america. of these, 2 black myotid bats (vespertilionidae), myotis nigricans, and 1 tent-making bat (phyllostomidae), uroderma magnirostrum, had oocysts in their feces that represent undescribed species of eimeria. the new species from m. nigricans (2/4, 50%) h ... | 1999 | 10386444 |
| bat flies (diptera: streblidae, nycteribiidae) parasitic on bats (mammalia: chiroptera) at parque estadual da cantareira, são paulo, brazil: parasitism rates and host-parasite associations. | a total of 443 bat flies belonging to the families nycteribiidae and strelidae, were collected on 22 species of bats (molossidae, phyllostomidae, and vespertilionidae) from parque estadual da cantareira (são paulo, brazil), between january, 2000 and january, 2001. eighteen new occurrences of bat flies were recorded on anoura geoffroyi (anastrebla caudiferae), glossophaga soricina (a. caudiferae), sturnira lilium (trichobius phyllostomae, t. furmani, and paraeuctenodes similis), artibeus lituratu ... | 2005 | 15867959 |
| [rabies virus in naturally infected bats in the state of são paulo, southeastern brazil]. | to identify the species of bats involved in maintaining the rabies cycle; to investigate the distribution of the rabies virus in the tissues and organs of bats and the time taken for mortality among inoculated mice. | 2007 | 17515992 |
| dengue virus in mexican bats. | individuals belonging to five families, 12 genera, and 19 different species of bats from dengue endemic areas in the gulf and pacific coasts of mexico were examined by elisa, rt-pcr, and for the presence of dengue virus (dv) ns1 protein. nine individuals from four species were seropositive by elisa: three insectivorous, myotis nigricans (four positives/12 examined), pteronotus parnellii (3/19), and natalus stramineus (1/4), and one frugivorous artibeus jamaicensis (1/35) (12.86% seroprevalence i ... | 2008 | 18325131 |
| histopathological changes in the placentas and fetuses of mice infected with trypanosoma cruzi isolated from the myotis nigricans nigricans bat. | histopathological changes and placental transmission were studied in the late stages of pregnancy in mice infected with a strain of trypanosoma cruzi, isolated from a myotis nigricans nigricans bat. large amastigote nests were observed in uterine muscles, as well as in decidual and endothelial placental cells. in addition, persistent coagulative and fibrotic vascular degeneration was observed. large amastigote burdens were found in giant cells, spongioblasts and endothelial cells within the laby ... | 2008 | 18640685 |
| size and shape variability in the skull of myotis nigricans (schinz, 1821) (chiroptera: vespertilionidae) from two geographic areas in brazil. | we present a quantitative analysis of sexual dimorphism and geographic variation in the skull of myotis nigricans (schinz, 1821) assessed by geometric morphometrics. differences in size and shape of skulls were investigated using 30 landmarks plotted on two-dimensional images of lateral and ventral views. results of geometric morphometrics revealed sexual dimorphism in the centroid size of the skull in both views. females were larger than males. nevertheless, there was no sexual dimorphism in sk ... | 2008 | 18833485 |
| sexual size dimorphism in myotis nigricans (schinz, 1821) (chiroptera: vespertilionidae) from south brazil. | among vespertilionidae species, sexual size dimorphism is very well documented, in which females are larger than males. the differences are mainly in body weight, skull measurements and forearm length. studies have discussed some hypothesis for this phenomenon. however, very little information is known about sexual size dimorphism in myotis nigricans (schinz, 1821) in brazil. in this sense, the goal of this paper is to present a study of this phenomenon in the species. for this, we present a qua ... | 2008 | 19197511 |
| species richness and abundance of bats in fragments of the stational semidecidual forest, upper paraná river, southern brazil. | the upper paraná river floodplain is inserted in a region of the mata atlântica biome, which is a critical area to preserve. due to the scarcity of researches about the chiropterofauna in this region, the present study investigated species richness and abundance of bats in remnants from the stational semidecidual forest of the upper paraná river, southern brazil. samplings were taken every month, from january to december 2006, using 32 mist nets with 8.0 x 2.5 m, resulting in 640 m2/h and totali ... | 2009 | 19738978 |
| colony size, sex ratio and cohabitation in roosts of phyllostomus hastatus (pallas) (chiroptera: phyllostomidae). | phyllostomus hastatus bat is species broadly distributed over the neotropical region, which uses as diurnal roosts caves, hollow trees, palm leaves and human buildings. thirteen diurnal roosts of p. hastatus were analysed from 1990 to 2009 in several localities of rio de janeiro state, regarding environment (rural, urban or protected area), type of roost (hollow tree, basement or roof), sex ratio and cohabitation. a nocturnal roost was also analysed. sex ratio of p. hastatus varied considerably ... | 2010 | 21180912 |
| bats (mammalia: chiroptera) in native and reforested areas in rancho alegre, paraná, brazil. | abstract: generally, natural environments have been transformed into small forest remnants, with the consequent habitat loss and species extinction. the north paraná state is not an exception, since only 2 to 4% of the original ecosystem occurs in small fragments of stational semidecidual forest. we studied the species richness and abundance of bats in two forest fragments from the fazenda congonhas, in rancho alegre city, parana state, brazil. four samplings were undertaken in a legally protect ... | 2010 | 21246993 |
| bat-species richness in the pantanal floodplain and its surrounding uplands. | we studied the bat fauna of the pantanal floodplain and its surrounding plateaus in mato grosso do sul, brazil, based on the scientific collection at universidade anhanguera-uniderp and on the projeto morcegos do pantanal data bank at ufms, comprising 9,037 captures of 56 species recorded from 1994 to 2007. the pantanal surveys were carried out in the nhecolândia, aquidauana, miranda, and paraguai sub-regions; the uplands surveys took place in the maracaju, bodoquena, and urucum formations. bat ... | 2011 | 21537604 |
| genetic variability in species of bats revealed by rapd analysis. | random amplified polymorphic dna molecular marker was utilized as a means of analyzing genetic variability in seven bat species: molossus molossus, m. rufus, eumops glaucinus, e. perotis, myotis nigricans, eptesicus furinalis, and artibeus planirostris. the determination of genetic diversity was based on 741 bands produced by a 20-random primer set. only eight bands were considered monomorphic to one species. the greatest number of bands and the most polymorphic condition were exhibited by m. mo ... | 2006 | 17183488 |
| ultrastructure of spermatogenesis in the short-tailed fruit bat, carollia perspicillata (chiroptera: phyllostomidae: carollinae). | among species of the chiroptera, spermatogenesis and the fully differentiated spermatozoa differ in morphological and ultrastructural detail. this study therefore aimed to ultrastructurally characterize the spermatogenesis and the spermatozoa of carollia perspicillata (phyllostomidae) and compare the process with other species of bats and mammals. the differentiation of spermatogonia is similar to other bats and to primates, with three main spermatogonia types: ad, ap, and b. meiotic divisions p ... | 2014 | 24142890 |
| bat assemblages in conservation areas of a metropolitan region in southeastern brazil, including an important karst habitat. | species richness and abundance of bats were studied in four nature reserves, including a karst area which has many potential rocky shelters for bats, such as caves and rock crevices. the reserves were located in the greater belo horizonte metropolitan area, one of the most populated regions of brazil, within the atlantic forest, and cerrado (brazilian savanna) ecological domains. bats were sampled using mist-nets and, in the karst area, also by active searches in shelters. a total of 1,599 bats ... | 2013 | 23917558 |
| sunset-related timing of flight activity in neotropical bats. | the times of onset and completion of the hunting flights of three colonies of neotropical bats, each comprising 100-200 individuals, were observed for nine months. the colonies were of different species: molossus ater (m.a.) and molossus molossus (m.m.) of the molossidae, and myotis nigricans (my. n.) of the vespertilionidae. individuals of phyllostomus hastatus (p.h., phyllostomidae) were also observed. all the bats roosted in a building near restrepo, colombia (4°16'n, 73°34'w). times of emerg ... | 1978 | 28309285 |
| first evidence of frugivory in myotis (chiroptera, vespertilionidae, myotinae). | myotis occurs from tropical to temperate regions throughout the globe, and it is the largest bat genus with more than 100 species. most species are insect-eaters, but a few also feed on other invertebrates and fishes; there is no confirmed evidence of a plant item in their diet. | 2015 | 26696768 |
| impact of the processes of total testicular regression and recrudescence on the epididymal physiology of the bat myotis nigricans (chiroptera: vespertilionidae). | myotis nigricans is a species of vespertilionid bat, whose males show two periods of total testicular regression within the same annual reproductive cycle in the northwest são paulo state, brazil. studies have demonstrated that its epididymis has an elongation of the caudal portion, which stores spermatozoa during the period of testicular regression in july, but that they had no sperm during the regression in november. thus, the aim of this study was to analyze the impact of the total testicular ... | 2015 | 26057377 |
| impact of the processes of testicular regression and recrudescence in the prostatic complex of the bat myotis nigricans (chiroptera: vespertilionidae). | myotis nigricans is a species of vespertilionid bat, whose males show two periods of total testicular regression during the annual reproductive cycle in the northwest são paulo state, brazil. thus, the aim of this study was to investigate the impact of total testicular regression on the prostatic morphophisyology and its regulation. the prostatic complex (pc) of animals from the four periods of the reproductive cycle (active, regressing, regressed, and recrudescence) was analyzed by different hi ... | 2015 | 25703716 |
| structure, histochemistry, ultrastructure and seasonal variations of the male prostatic complex in the black myotis bat, myotis nigricans (chiroptera: vespertilionidae). | chiroptera are one of the most diverse orders of mammals and a unique group within mammalia that posses a wide geographic distribution and considerable variability in reproductive strategies. the aims of the present study were to characterise the male prostatic complex of the bat myotis nigricans (vespertilionidae) and evaluate seasonal variations in the prostatic complex of m. nigricans specifically. twenty-three sexually mature specimens (four sample groups: winter, spring, summer and autumn) ... | 2014 | 25294361 |
| differential expression of aromatase, estrogen receptor alpha and 17β-hsd associated with the processes of total testicular regression and recrudescence in the bat myotis nigricans (chiroptera: vespertilionidae). | despite the worldwide distribution and many unique reproductive adaptations that bats present, many aspects of their reproductive hormonal regulation have not been adequately studied, especially in species that presented patterns of total testicular regression. thus, this study aimed to evaluate the testicular expression of 17β-hsd type 1, aromatase and erα in the bat myotis nigricans, during the four periods of its reproductive cycle. immunoreactivity for erα was detected only in the cytoplasm ... | 2014 | 24726986 |
| ultrastructural characteristics of the spermatogenesis during the four phases of the annual reproductive cycle of the black myotis bat, myotis nigricans (chiroptera: vespertilionidae). | myotis nigricans is an endemic species of vespertilionid bat, from the neotropical region, that resembles temperate zone bats in their reproductive cycle; presenting an annual reproductive cycle with two periods of testicular regression, which are not linked to the apoptotic process and seems to be not directly linked to any seasonal abiotic variation. thus, this study aimed to ultrastructurally evaluate their reproductive cycle. the process of testicular regression could be divided into four pe ... | 2013 | 23857678 |
| two periods of total testicular regression are peculiar events of the annual reproductive cycle of the black myotis bat, myotis nigricans (chiroptera: vespertilionidae). | myotis nigricans presents few and controversial reproductive data, which indicate geographical variation in reproduction. thus, this study aimed to evaluate the seasonal modifications in testicular and epididymal morphologies in a tropical environment, submitting these organs to morphometric and immunohistochemical analysis. the observations revealed that this species presents two peaks of spermatogenic activity followed by two periods of total testicular regression (a quiescent pre-pubertal-lik ... | 2014 | 23830483 |
| morphological characterization of the testicular cells and seminiferous epithelium cycle in six species of neotropical bats. | we know little about the process of spermatogenesis in bats, a great and diverse clade of mammals that presents different reproductive strategies. in the present study, spermatogenesis in six species of neotropical bats was investigated by light microscopy. on the basis of chromatin condensation, nuclear morphology, relative position to the basal membrane and formation of the flagellum, three types of spermatogonia were recognized: dark type a (a(d)), pale type a (a(p)), and type b; the developm ... | 2009 | 19248152 |
| reproductive cycle of a neotropical insectivorous bat, myotis nigricans. | | 1970 | 5418251 |
| leishmania presence in bats in areas endemic for leishmaniasis in central-west brazil. | leishmaniasis involves the participation of several species of both wild and domestic mammal hosts and sandfly vectors, which demonstrates the eco-epidemiological complexity observed in this disease. bats are among the most abundant types of mammals and the scarcity of research on leishmania infection in these animals gives evidence of the importance of new studies that aim to clarify this relationship. this study aimed to detect the leishmania spp. in bats. 146 bats, representing 16 different s ... | 2020 | 32195111 |
| street rabies virus strains associated with insectivorous bats are less pathogenic than strains isolated from other reservoirs. | rabies is a fatal and viral zoonosis that causes acute, progressive encephalitis and remains an important concern in public health. in the last few years, there has been a change in the epidemiological profile of rabies after implementing canine rabies control in the americas, which has led to a significant increase in both human and pet cases of rabies associated with insectivorous bats. thus, it is important to understand the pathogenesis caused by rabies virus (rabv) isolates from insectivoro ... | 2018 | 30393124 |
| morphophysiological variations of the female reproductive organs of the vespertilionid bat myotis nigricans during its different reproductive phases. | myotis nigricans is an important species of insectivorous bat from the vespertilionidae family, which is endemic of the neotropics. despite its wide distribution, no detailed study of the reproduction is found for this species. thus, the aim of the present study was to evaluate and characterize morphological and morphometric variations of the female reproductive organs of m. nigricans during its different reproductive phases. twenty adult females were collected, divided into four (4) sample grou ... | 2020 | 32956861 |
| implications of body condition and seasonality on morphological and functional parameters of testes of myotis nigricans (chiroptera: vespertilionidae). | the insectivorous bat myotis nigricans is widely distributed throughout the neotropics, including brazil, and has a reproductive biology that is affected by climate and food availability. to evaluate the reproductive capacity of this species, morphofunctional parameters of the testes were correlated with environmental variables and the body condition of individuals captured. after bats had been killed, their testes were removed, fixed in karnovsky's fluid for 24h and embedded in resin for evalua ... | 2018 | 29325604 |