Case Report: Cutaneous Leishmaniasis due to Leishmania (Viannia) panamensis in Two Travelers Successfully Treated with Miltefosine.

We present two cases of Leishmania (V) panamensis in returning travelers from Central America successfully treated with miltefosine. The couple presented with ulcerative skin lesions nonresponsive to antibiotics. Skin biopsy with polymerase chain reaction (PCR) revealed L. (V) panamensis. To prevent the development of mucosal disease and avoid the inconvenience of parental therapy, we treated both patients with oral miltefosine. We suggest that miltefosine represents an important therapeutic alternative in the treatment of cutaneous lesions caused by L. panamensis and in preventing mucosal involvement.

Interspecific Associations between Cycloneda sanguinea and Two Aphid Species (Aphis gossypii and Hyadaphis foeniculi) in Sole-Crop and Fennel-Cotton Intercropping Systems.

Aphids cause significant damage to crop plants. Studies regarding predator-prey relationships in fennel (Foeniculum vulgare Mill.) and cotton (Gossypium hirsutum L.) crops are important for understanding essential ecological interactions in the context of intercropping and for establishing pest management programs for aphids. This study evaluated the association among Hyadaphis foeniculi (Passerini) (Hemiptera: Aphididae), Aphis gossypii Glover (Hemiptera: Aphididae) and Cycloneda sanguinea (L.) (Coleoptera: Coccinellidae) in cotton with coloured fibres, fennel and cotton intercropped with fennel. Association analysis was used to investigate whether the presence or absence of prey and predator species can indicate possible interactions between aphids and ladybugs. Significant associations among both apterous and alate H. foeniculi and C. sanguinea were observed in both the fennel and fennel-cotton intercropping systems. The similarity analysis showed that the presence of aphids and ladybugs in the same system is significantly dependent on the type of crop. A substantial amount of evidence indicates that the presence of the ladybug C. sanguinea, is associated with apterous or alate A. gossypii and H. foeniculi in fennel-cotton intercropping system. We recommend that future research vising integrated aphid management taking into account these associations for take decisions.

Range extension of the vulnerable dwarf marmoset, Callibella humilis (Roosmalen et al. 1998), and first analysis of its long call structure.

We present two new records for the vulnerable dwarf marmoset, Callibella humilis. The first record, based on observed and photographed individuals, is from a campinarana area on the left (west) bank of the Rio Madeirinha, a left (west)-bank tributary of the Rio Roosevelt in the state of Amazonas, municipality of Novo Aripuanã and extends the distribution of the species ~270 km southwards, to the left (west) bank of the rio Roosevelt. The second record is based on an individual collected from the mouth of the Rio Roosevelt, at less than 10 km from the type locality of Mico marcai. This indicates that the species occurs sympatrically with M. marcai and probably Mico melanurus. We also present the first sonogram analysis of its long call structure, which shows some similarities, in the note duration and frequency, with Cebuella pygmaea and Mico argentatus.

Preliminary observations on the characteristics of the owned dog population in Roseau, Dominica.

This article reports findings from interviews with 93 heads of households (38.6% of all households) who owned 148 dogs in Roseau, the capital of The Commonwealth of Dominica. Mixed dogs, of no definable cross, were most common, followed by Rottweiler crosses. The median age of the dogs was 3 years, and 9.4% of the population was over 7 years. Respondents showed a definite preference for keeping male dogs (60%), and most animals were kept for protection (65%). Almost 30% of the dogs were allowed to roam. With 8.5% of the dogs neutered and 7 puppies per litter being born, the owned population produces more dogs than are required to maintain its size and so can provide recruits to the "stray" dog population. Comparisons with studies elsewhere in the Caribbean region (Fielding & Plumridge, 2005; Ortega-Pacheco et al. (in press) suggest that environmental effects rather than the level of care offered are primarily responsible for controlling the dog population.

Kinetics of cytokine expression and regulation of host protection following infection with molecularly cloned Venezuelan equine encephalitis virus.

In the mouse model, the arbovirus Venezuelan equine encephalitis virus (VEE) replicates in lymphoid tissues prior to either inducing protective immunity (attenuated VEE mutant) or progressing to lethal encephalitis (virulent parent VEE). To investigate the mechanism of the protective response, cytokine gene expression was examined during the course of the primary in vivo immune response to molecularly cloned, virulent VEE and a single-site attenuated VEE mutant, using a quantitative reverse transcriptase-polymerase chain reaction assay. VEE-induced cytokine gene expression was 100-fold elevated over that of untreated controls for IFN-gamma and IL-6 and 10-fold increased for IL-12, IL-10, and TNF-alpha. There was no qualitative difference in cytokine gene induction comparing mice infected with the attenuated and the virulent VEE; however, there were significant differences in the cytokine gene expression kinetics. In mice infected with the attenuated VEE, elevated cytokine gene expression was delayed 24 hr when compared to mice infected with the virulent parent VEE clone at the same dose. Further, IFN-gamma protein secretion by cells from the draining lymph node mimicked the pattern of IFN-gamma gene induction by cells harvested from the same site. IFN-gamma gene expression was elevated at an earlier time point in mice given virulent V3000 24 hr after attenuated V3032 injection compared to mice infected with virulent V3000 alone. The combined V3000/V3032 infection resulted in host protection. Treatment of mice with IL-12 prior to infection with virulent VEE failed to reduce the severity of infection, while anti-IL-12 antibody did not prevent the early protective effect of attenuated virus. In contrast, administration of anti-IFN-alpha/beta antibody prior to VEE infection worsened virulent VEE disease. These results indicate that the attenuated VEE strain elicits a similar but delayed cytokine response compared to the virulent strain, suggesting that the kinetics of cytokine expression and the particular cytokine produced may influence the development of a host protective response. Furthermore, IFN-alpha/beta, but not IL-12, seems to be a major factor in the induction of early protection against VEE infection and disease.

Addition of three new serotypes of Shigella boydii to the Shigella schema.

No new serotypes have been added to the Shigella schema since 1958, although several provisional serotypes have been described. We conducted biochemical and serological studies on three provisional Shigella boydii serotypes. Four strains of serotype 2710-54 from four widely separated countries, 7 strains of serotype 3615-53 from three different countries, and 31 strains of serotype 1344-78 (E10163) from six different countries were included. Reactions of all three serotypes were consistent with those of S. boydii. On the basis of these results and other published research, we propose that these three provisional serotypes be admitted to the Shigella schema as S. boydii 16, 17, and 18.

Magnetic resonance imaging in cystic fibrosis.

A clinical dilemma in patients with cystic fibrosis is the determination of the nature of linear areas of decreased aeration in the lungs. It is difficult using chest roentgenograms or even computed tomography to differentiate atelectasis, mucoid impacted bronchi, or peribronchial inflammatory disease from normal pulmonary vascularity. Magnetic resonance imaging is a noninvasive sensitive means that provides the distinction. Pulmonary vessels are easily identified, because with the spin-echo sequence that we use, the rapidly flowing blood within the vessels has no signal intensity. In contradistinction, mucoid-impacted bronchi appear as high-intensity linear branching structures. Peribronchial inflammatory disease appears as curvilinear areas of high intensity, representing inflammatory edema, around central lucencies representing bronchi.