No abstract

As part of a prospective study of leptospirosis and biodiversity of Leptospira in the Peruvian Amazon, a new Leptospira species was isolated from humans with acute febrile illness. Field trapping identified this leptospire in peridomestic rats (Rattus norvegicus, six isolates; R. rattus, two isolates) obtained in urban, peri-urban, and rural areas of the Iquitos region. Novelty of this species was proven by serological typing, 16S ribosomal RNA gene sequencing, pulsed-field gel electrophoresis, and DNA-DNA hybridization analysis. We have named this species “Leptospira licerasiae” serovar Varillal, and have determined that it is phylogenetically related to, but genetically distinct from, other intermediate Leptospira such as L. fainei and L. inadai. The type strain is serovar Varillal strain VAR 010T, which has been deposited into internationally accessible culture collections. By microscopic agglutination test, “Leptospira licerasiae” serovar Varillal was antigenically distinct from all known serogroups of Leptospira except for low level cross-reaction with rabbit anti–L. fainei serovar Hurstbridge at a titer of 1∶100. LipL32, although not detectable by PCR, was detectable in “Leptospira licerasiae” serovar Varillal by both Southern blot hybridization and Western immunoblot, although on immunoblot, the predicted protein was significantly smaller (27 kDa) than that of L. interrogans and L. kirschneri (32 kDa). Isolation was rare from humans (2/45 Leptospira isolates from 881 febrile patients sampled), but high titers of MAT antibodies against “Leptospira licerasiae” serovar Varillal were common (30%) among patients fulfilling serological criteria for acute leptospirosis in the Iquitos region, and uncommon (7%) elsewhere in Peru. This new leptospiral species reflects Amazonian biodiversity and has evolved to become an important cause of leptospirosis in the Peruvian Amazon.

Habitat fragmentation and conversion are among the human activities that pose the greatest threat to species persistence and conservation of biodiversity. This is particularly true in the Neotropics, where bats represent important components of biodiversity from taxonomic and functional perspectives, and provide critical ecosystem services (e.g., seed dispersal and pollination). We assessed the degree to which conversion of lowland Amazonian rain forest to agriculture, and its subsequent abandonment and secondary succession, affect the abundances of populations of phyllostomid bats in the vicinity of Iquitos, Perú. During 90,720 net‐m‐h of sampling, we captured 3789 bats of five families; of these 3764 were phyllostomids representing 44 species, 23 genera, and three feeding guilds. We focus on the 24 most abundant species of phyllostomids. In terms of abundance, frugivores dominated assemblages in all habitat types and seasons. Eight species consistently responded to habitat conversion, two species consistently responded to season, two species responded consistently to both habitat and season, and five species responded to habitat conversion in a season‐specific manner. Frugivores and nectarivores were abundant in areas that had been converted to agriculture, which suggests that these bats are resilient to extant levels of disturbance and may be important in promoting secondary succession. However, this result may be scale‐ or context‐dependent. If habitat conversion continues and dramatically reduces the areal extent and increases fragmentation of mature forest, then a complex metacommunity dynamic may characterize the region and source populations of bats may become threatened or extirpated locally.

The role of bats as potential sources of transmission to humans or as maintenance hosts of leptospires is poorly understood. We quantified the prevalence of leptospiral colonization in bats in the Peruvian Amazon in the vicinity of Iquitos, an area of high biologic diversity. Of 589 analyzed bats, culture (3 of 589) and molecular evidence (20 of 589) of leptospiral colonization was found in the kidneys, yielding an overall colonization rate of 3.4%. Infection rates differed with habitat and location, and among different bat species. Bayesian analysis was used to infer phylogenic relationships of leptospiral 16S ribosomal DNA sequences. Tree topologies were consistent with groupings based on DNA-DNA hybridization studies. A diverse group of leptospires was found in peri-Iquitos bat populations including Leptospira interrogans (5 clones), L. kirschneri (1), L. borgpetersenii (4), L. fainei (1), and two previously undescribed leptospiral species (8). Although L. kirschenri and L. interrogans have been previously isolated from bats, this report is the first to describe L. borgpetersenii and L. fainei infection of bats. A wild animal reservoir of L. fainei has not been previously described. The detection in bats of the L. interrogans serovar Icterohemorrhagiae, a leptospire typically maintained by peridomestic rats, suggests a rodent-bat infection cycle. Bats in Iquitos maintain a genetically diverse group of leptospires. These results provide a solid basis for pursuing molecular epidemiologic studies of bat-associated Leptospira, a potentially new epidemiologic reservoir of transmission of leptospirosis to humans.

The postcranial skeleton of the neotropical living marsupial Glironia venusta is described and compared in a functional framework. Osteological and myological characters of 19 species of living didelphids and some additional placentals were consulted as models to explain functional implications from the morphology. The skeleton of G. venusta provides evidence about locomotory behavior and specific capacities of movements, and reveals patterns comparable to arboreal didelphids and placentals with high capacity to climb. In general terms, G. venusta has few diagnostic characters in the context of the didelphid sample analyzed, which includes representatives of all recognized clades in the family (second sacral not fused to the ilium, humeral greater trochanter well developed, tibia shorter than femur). Most of the postcranial pattern in G. venusta is consistent with arboreal locomotion, but unlike Caluromys and Caluromysiops, it seems to have faster locomotion. The morphology of the vertebral column, at the thoracic and lumbar portions, shows features that allow powerful lateral and sagittal movements during different phases of locomotion. The patterns evidenced in the forelimbs, pelvic girdle, and hindlimbs point to arboreal habits as well, except for some features on the humerus, illium and fibula. Even if most didelphids have been cataloged as generalized with respect to their mode of gait, the skeletal morphology of G. venusta and the high variation existent in further neotropical marsupials with a variety of body sizes, reveal a diverse combination of features associated to specialized capacities of movements. This indicates a diversity of locomotory modes and postures in didelphids. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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When biodiversity conservation of noncharismatic species is a priority, local people perception and value attributed to species are of vital importance. The big colony of bats (Tadarida brasiliensis) in the Escaba dam located at the Yungas forest is an emblematic case for the conservation of bats in Argentina. The objective of this study was to evaluate the perception and attitude about the bats of the people living around the Escaba dam in order to redirect conservation efforts and education plans. Semistructured surveys and participant observation were used to survey the information; and generalized linear models to analyze the data. The local inhabitants do not recognize the diversity of bat species and mention only bloodsucking and insectivorous bats. The results show a positive trend in perception and attitude, influenced by the recognition of the role of bats as insect controllers and a feeling of identity generated by the colony. The perception becomes more positive as age advances and in those who reached the secondary level of education. New ways of measuring perception and attitude are presented, such as describing the forms of bat exclusion. All this must be considered in the development of the management plan, which should consider the possible local use of guano as a fertilizer, sustainable tourism and educational actions aiming at differentiating the species (i.e. this is not a hematophagous bat colony), the role of the colony at controlling possible diseases and the ecosystem services associated with these species.

Seven new species of Myotis have been recently described from South