Expression by Streptomyces lividans of the Rat α Integrin CD11b A-Domain as a Secreted and Soluble Recombinant Protein

We already reported the use of a long synthetic signal peptide (LSSP) to secrete the Streptomyces sp. TO1 amylase by Streptomyces lividans strain. We herein report the expression and secretion of the rat CD11b A-domain using the same LSSP and S. lividans as host strain. We have used the Escherichia coli/Streptomyces shuttle vector pIJ699 for the cloning of the A-domain DNA sequence downstream of LSSP and under the control of the constitutive ermE-up promoter of Streptomyces erythraeus. Using this construct and S. lividans as a host strain, we achieved the expression of 8 mg/L of soluble secreted recombinant form of the A-domain of the rat leukocyte β2 integrin CD11/CD18 alpha M subunit (CD11b). This secreted recombinant CD11b A-domain reacted with a function blocking antibody showing that this protein is properly folded and probably functional. These data support the capability of Streptomyces to produce heterologous recombinant proteins as soluble secreted form using the “LSSP” synthetic signal peptide

Intractable Hepatic Hydrothorax: A Successful Outcome following CPAP Treatment

Hepatic hydrothorax is an uncommon complication in patients with end-stage liver disease. It may result in dyspnoea, hypoxia and infection, and carries a poor prognosis. Initial treatment is based on a sodium-free diet together with diuretics. In case of recurrent hydrothorax, a transjugular intrahepatic portosystemic shunt (TIPS) or liver transplant should be considered. Here we describe an 80-year-old woman with decompensated liver cirrhosis related to NASH who presented with refractory hepatic hydrothorax. Treatment with CPAP resulted in a marked improvement in her pleural effusion

EPIDEMIOLOGICAL STUDY OF CRYPTOSPORIDIOSIS AND DISEASE-ASSOCIATED FACTORS IN SHEEP IN A STEPPE REGION OF ALGERIA (AIN OUSSERA)

This work has focused on the search for Cryptosporidium sp. carried out on a sample of 1 605 animals (1 235 lambs, 300 ewes, and 70 rams) from sixty-two flocks distributed in the commune of Ain Oussera one of the steppe regions of Algeria between 2014-2016., fifty-two flocks were positive for Cryptosporidium sp screening, with a flock prevalence 84% (CI95 % 72,8 % - 91  %).The total individual prevalence was 14.6%, the prevalence of lamb infestation was 15,4 %, for ewes and rams were 13,7 %, 4,3 % respectively (p < 0,05)

Zoonotic Cryptosporidium species and subtypes in lambs and goat kids in Algeria

Abstract Background Little is known on the occurrence and identity of Cryptosporidium species in sheep and goats in Algeria. This study aimed at investigating the occurrence of Cryptosporidium species in lambs and goat kids younger than 4 weeks. Methods A total of 154 fecal samples (62 from lambs and 92 from kid goats) were collected from 13 sheep flocks in Médea, Algeria and 18 goat flocks across Algiers and Boumerdes. They were screened for Cryptosporidium spp. by nested-PCR analysis of a fragment of the small subunit (SSU) rRNA gene, followed by restriction fragment length polymorphism and sequence analyses to determine the Cryptosporidium species present. Cryptosporidium parvum and C. ubiquitum were further subtyped by sequence analysis of the 60 kDa glycoprotein gene. Results Cryptosporidium spp. were detected in 17 fecal samples (11.0%): 9 from lambs (14.5%) and 8 from goat kids (8.7%). The species identified included C. parvum in 3 lambs, C. xiaoi in 6 lambs and 6 goat kids, and C. ubiquitum in 2 goat kids. Cryptosporidium infections were detected mostly in animals during the first two weeks of life (7/8 for goat kids and 7/9 for lambs) and in association with diarrhea occurrence (7/17 or 41.2% goat kids and 7/10 or 70.0% lambs with diarrhea were positive for Cryptosporidium spp.). Subtyping of C. parvum and C. ubiquitum isolates identified the zoonotic IIaA13G2R1 and XIIa subtype families, respectively. Minor differences in the SSU rRNA gene sequences were observed between C. xiaoi from sheep and goats. Conclusions Results of this study indicate that three Cryptosporidium species occur in lambs and goat kids in Algeria, including zoonotic C. parvum and C. ubiquitum. They are associated with the occurrence of neonatal diarrhea