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- Camilo, F., et al.
(författare)
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Revival of the Magnetar PSR J1622-4950: Observations with MeerKAT, Parkes, XMM-Newton, Swift, Chandra, and NuSTAR
- 2018
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Ingår i: Astrophysical Journal. - : American Astronomical Society. - 1538-4357 .- 0004-637X. ; 856:2
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Tidskriftsartikel (refereegranskat)abstract
- New radio (MeerKAT and Parkes) and X-ray (XMM-Newton, Swift, Chandra, and NuSTAR) observations of PSR J1622-4950 indicate that the magnetar, in a quiescent state since at least early 2015, reactivated between 2017 March 19 and April 5. The radio flux density, while variable, is approximately 100 larger than during its dormant state. The X-ray flux one month after reactivation was at least 800 larger than during quiescence, and has been decaying exponentially on a 111 19 day timescale. This high-flux state, together with a radio-derived rotational ephemeris, enabled for the first time the detection of X-ray pulsations for this magnetar. At 5%, the 0.3-6 keV pulsed fraction is comparable to the smallest observed for magnetars. The overall pulsar geometry inferred from polarized radio emission appears to be broadly consistent with that determined 6-8 years earlier. However, rotating vector model fits suggest that we are now seeing radio emission from a different location in the magnetosphere than previously. This indicates a novel way in which radio emission from magnetars can differ from that of ordinary pulsars. The torque on the neutron star is varying rapidly and unsteadily, as is common for magnetars following outburst, having changed by a factor of 7 within six months of reactivation.
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- Abidi, S, et al.
(författare)
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Standardised shorter regimens versus individualised longer regimens for rifampin- or multidrug-resistant tuberculosis
- 2020
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Ingår i: The European respiratory journal. - : European Respiratory Society (ERS). - 1399-3003 .- 0903-1936. ; 55:3
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Tidskriftsartikel (refereegranskat)abstract
- We sought to compare the effectiveness of two World Health Organization (WHO)-recommended regimens for the treatment of rifampin- or multidrug-resistant (RR/MDR) tuberculosis (TB): a standardised regimen of 9–12 months (the “shorter regimen”) and individualised regimens of ≥20 months (“longer regimens”).We collected individual patient data from observational studies identified through systematic reviews and a public call for data. We included patients meeting WHO eligibility criteria for the shorter regimen: not previously treated with second-line drugs, and with fluoroquinolone- and second-line injectable agent-susceptible RR/MDR-TB. We used propensity score matched, mixed effects meta-regression to calculate adjusted odds ratios and adjusted risk differences (aRDs) for failure or relapse, death within 12 months of treatment initiation and loss to follow-up.We included 2625 out of 3378 (77.7%) individuals from nine studies of shorter regimens and 2717 out of 13 104 (20.7%) individuals from 53 studies of longer regimens. Treatment success was higher with the shorter regimen than with longer regimens (pooled proportions 80.0% versus 75.3%), due to less loss to follow-up with the former (aRD −0.15, 95% CI −0.17– −0.12). The risk difference for failure or relapse was slightly higher with the shorter regimen overall (aRD 0.02, 95% CI 0–0.05) and greater in magnitude with baseline resistance to pyrazinamide (aRD 0.12, 95% CI 0.07–0.16), prothionamide/ethionamide (aRD 0.07, 95% CI −0.01–0.16) or ethambutol (aRD 0.09, 95% CI 0.04–0.13).In patients meeting WHO criteria for its use, the standardised shorter regimen was associated with substantially less loss to follow-up during treatment compared with individualised longer regimens and with more failure or relapse in the presence of resistance to component medications. Our findings support the need to improve access to reliable drug susceptibility testing.
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- Conradie, W., et al.
(författare)
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New species of Mongrel Frogs (Pyxicephalidae: Nothophryne) for northern Mozambique inselbergs
- 2018
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Ingår i: African Journal of Herpetology. - : Informa UK Limited. - 2156-4574 .- 2153-3660. ; 67:1, s. 61-85
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Tidskriftsartikel (refereegranskat)abstract
- Nothophryne Poynton, 1963 is a monotypic genus of frog, with the nominal species N. broadleyi found only on Mount Mulanje, in southern Malawi. Recent surveys in northern Mozambique, however, have uncovered at least four new species associated with four inselbergs (Mount Inago, Mount Namuli, Mount Ribaue and Taratibu Hills). Previous phylogenetic analyses using mitochondrial genes suggest that each mountain isolate has an endemic species of Nothophryne. Herein we provide a rediagnosis of the genus and comparative diagnoses of four new species based on new material.ZooBank urn:lsid:zoobank.org:pub:19C53BF3-BA52-4CAE-933F-5BBEE0AF0457
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- Farooq, Harith, 1986, et al.
(författare)
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Shedding Light on a Biodiversity Dark Spot: Survey Of Amphibians and Reptiles of Pemba Region in Northern Mozambique
- 2022
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Ingår i: Herpetological Conservation and Biology. - 2151-0733. ; 17:2, s. 423-432
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Tidskriftsartikel (refereegranskat)abstract
- The biodiversity of northern Mozambique is likely one of the least known in southern Africa but is expected to harbor rich herpetofaunal diversity due to the high diversity in neighboring countries, the presence of diverse habitats, and its large size. Here, we summarize 19 years of reported observations and collections from the Pemba region in Cabo Delgado Province to better document the herpetofaunal diversity and distribution in coastal northern Mozambique. We report the presence of two species of amphibians and 27 species of reptiles for the first time from the region. In total, the Pemba region is now known to harbor 54 herpetofaunal species (19 amphibians and 35 reptiles) of which two (sea turtles) are at risk. Additionally, of the six snake species regarded as medically important to humans, we have formally documented five for the first time from the entire Cabo Delgado Province. Our compilation of new records adds 15 verified herpetofaunal species for the province, raising the total from 86 to 101. © 2022. Harith Farooq All Rights Reserved.
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- Ihlow, F., et al.
(författare)
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Geographic range extension of Speke's hinge-back tortoise kinixys spekii gray, 1863
- 2019
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Ingår i: Amphibian and Reptile Conservation. - 1083-446X. ; 13:2, s. 61-67
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Tidskriftsartikel (refereegranskat)abstract
- Kinixys spekii has a wide distribution range across sub-Saharan Africa, having been reported from Angola, Botswana, Burundi, the Democratic Republic of the Congo, eSwatini, Kenya, Malawi, Mozambique, Namibia, South Africa, Tanzania, Zambia, and Zimbabwe. Kinixys spekii inhabits savannah and dry bushveld habitats and was previously considered an inland species. However, recent records suggest a more extensive geographical distribution. Here, we provide genetically verified records for Angola, South Africa, and Mozambique, and discuss reliable sightings for Rwanda. These new records extend the range significantly to the east and west, and provide evidence for the occurrence of this species along the coast of the Indian Ocean in South Africa and Mozambique. © 2019 Ihlow et al.
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