Direct transmission of the haemoflagellate Cryptobia salmositica among Pacific salmon (Oncorhynchus spp.)

1983 ◽  
Vol 61 (6) ◽  
pp. 1242-1250 ◽  
Author(s):  
Susan M. Bower ◽  
L. Margolis
Keyword(s):  
Life History ◽  
Pacific Salmon ◽  
Oncorhynchus Kisutch ◽  
Infected Fish ◽  
The Body ◽  
Direct Transmission ◽  
Supportive Evidence ◽  
Short Term ◽  
Water Contact ◽  
Adjacent Channel

Laboratory-reared juvenile Oncorhynchus nerka were marked, inoculated with Cryptobia (= Trypanoplasma) salmositica, and held in tanks with equal numbers of untreated fish. About 85% (116 of 137) of the untreated fish (held in freshwater or seawater) exposed by brief out-of-water contact with heavily infected fish in a dipnet became infected. Without out-of-water contact, only 4% (3 of 85) of the untreated fish held in the same tanks as inoculated fish became infected. The flagellates were shown to escape from the coelom to the body surface of infected fish via ruptured areas in the region of the abdominal pores. The escaped flagellates were similar in morphology to those in the blood and were equally sensitive to lysis in water but the mucus from the fish provided the flagellates with short-term protection. Supportive evidence that direct transmission may occur in the field was obtained when juvenile Oncorhynchus kisutch held in seminatural rearing channels in a hatchery showed an increase in the prevalence of infection after they were moved to an adjacent channel. Leech vectors (Piscicola salmositica) were not observed to account for the increase in the number of infected fish, and the prevalence of infection remained low in fish that were not moved. Indirect versus direct life history is currently the only criterion used in distinguishing Trypanoplasma (parasitic in blood and other fluids of fish) from Cryptobia (parasitic in molluscs and externally on fish). The evidence of direct transmission in a blood form demonstrates that this criterion is not reliable. The genus Trypanoplasma Laveran and Mesnil, 1901 is therefore considered to be a junior synonym of the genus Cryptobia Leidy, 1846.

Costs and benefits of post-weaning associations in mountain goats

Behaviour ◽  
2018 ◽  
Vol 155 (4) ◽  
pp. 295-326 ◽  
Author(s):  
Karina Charest Castro ◽  
Mathieu Leblond ◽  
Steeve D. Côté
Keyword(s):  
Life History ◽  
Body Mass ◽  
Life History Traits ◽  
The Body ◽  
Costs And Benefits ◽  
Short Term ◽  
Maternal Characteristics ◽  
Oreamnos Americanus ◽  
Lactating Mothers ◽  
Mountain Goats

Abstract To better understand the potential costs and benefits of prolonged parental care in gregarious species, we studied post-weaning associations in a marked population of mountain goats (Oreamnos americanus) monitored for 22 years. We calculated the occurrence and frequency of associations involving 1- and 2-year-old juveniles. We investigated (1) the influence of maternal characteristics and population size on the formation of post-weaning associations, (2) the short-term costs of associations on maternal reproductive success, and (3) the short-term benefits of associations on life-history traits of juveniles. We found that barren mothers associated more frequently with 1-year-olds than summer yeld and lactating mothers. Associations with 2-year-olds tended to increase the probability that a mother would be barren the following year. Post-weaning associations did not influence the body mass of newborn kids nor the body mass and survival of juveniles. We discuss how benefits for associated juveniles may appear later in life.

Critical analysis and unique management of Gridhrasi w.s.r. to Sciatica - A Case Report

2018 ◽  
Vol 3 (4) ◽  
Author(s):  
Dr. Rangarajan B. ◽  
Dr. Muralidhara .
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Case Report ◽  
Total Population ◽  
The Body ◽  
Walking Distance ◽  
Common Symptom ◽  
Low Back ◽  
Short Term ◽  
Lower Back

Gridhrasi (Sciatica) is a disorder in which low back pain is found, that spreads through the hip, to the back of the thigh and down the inside of the leg. Mechanical low back pain (LBP) remains the second most common symptom related reason for seeing a physician. 85% of total population will experience an episode of mechanical LBP at some point during their lifetime. Fortunately, the LBP resolves for the vast majority within 2-4 weeks. There are many causes for low back pain, however true sciatica is a symptom of inflammation or compression of the sciatica nerve. The sciatica nerve carries impulses between nerve roots in the lower back and the muscles and nerve of the buttocks, thighs and lower legs. Compression of a nerve root often occurs as a result of damage to one of the discs between the vertebrae. In some cases, sciatic pain radiate from other nerves in the body. This is called referred pain. Pain associated with sciatica often is severe, sharp and shooting. It may be accompanied by other symptom, such as numbness, tingling, weakness and sensitivity to touch. There is only conservative treatment giving short term relief in pain or surgical intervention with side effect. But these are not successful and therefore those who are suffering from this are always in search of result oriented remedy. Walking distance and SLR test were taken for assessment parameter, VAS score was adopted for pain. Before treatment patient was not able to walk even 4 to 5 steps due to severe pain, was brought on stretcher and his SLR was 30° of right side. After 22 days of treatment he was able to walk up to 500 meters without any difficulty, SLR was changed to 60° and patient had got 80 % relief in pain. This case report showed that Ayurvedic protocol is potent and safe in the treatment of Gridhrasi.

scholarly journals Oxidative Stress, Glutathione Metabolism, and Liver Regeneration Pathways Are Activated in Hereditary Tyrosinemia Type 1 Mice upon Short-Term Nitisinone Discontinuation

Genes ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 3
Author(s):  
Haaike Colemonts-Vroninks ◽  
Jessie Neuckermans ◽  
Lionel Marcelis ◽  
Paul Claes ◽  
Steven Branson ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Stress Response ◽  
Liver Regeneration ◽  
The Body ◽  
Glutathione Metabolism ◽  
Short Term ◽  
Therapeutic Regime ◽  
Tyrosinemia Type 1 ◽  
Hereditary Tyrosinemia

Hereditary tyrosinemia type 1 (HT1) is an inherited condition in which the body is unable to break down the amino acid tyrosine due to mutations in the fumarylacetoacetate hydrolase (FAH) gene, coding for the final enzyme of the tyrosine degradation pathway. As a consequence, HT1 patients accumulate toxic tyrosine derivatives causing severe liver damage. Since its introduction, the drug nitisinone (NTBC) has offered a life-saving treatment that inhibits the upstream enzyme 4-hydroxyphenylpyruvate dioxygenase (HPD), thereby preventing production of downstream toxic metabolites. However, HT1 patients under NTBC therapy remain unable to degrade tyrosine. To control the disease and side-effects of the drug, HT1 patients need to take NTBC as an adjunct to a lifelong tyrosine and phenylalanine restricted diet. As a consequence of this strict therapeutic regime, drug compliance issues can arise with significant influence on patient health. In this study, we investigated the molecular impact of short-term NTBC therapy discontinuation on liver tissue of Fah-deficient mice. We found that after seven days of NTBC withdrawal, molecular pathways related to oxidative stress, glutathione metabolism, and liver regeneration were mostly affected. More specifically, NRF2-mediated oxidative stress response and several toxicological gene classes related to reactive oxygen species metabolism were significantly modulated. We observed that the expression of several key glutathione metabolism related genes including Slc7a11 and Ggt1 was highly increased after short-term NTBC therapy deprivation. This stress response was associated with the transcriptional activation of several markers of liver progenitor cells including Atf3, Cyr61, Ddr1, Epcam, Elovl7, and Glis3, indicating a concreted activation of liver regeneration early after NTBC withdrawal.

scholarly journals Do algae blooms dilute the risk of trematode infections in threespine sticklebacks?

2015 ◽  
Vol 61 (6) ◽  
pp. 991-995 ◽  
Author(s):  
Alexandre Budria ◽  
Ulrika Candolin
Keyword(s):  
Body Size ◽  
Gasterosteus Aculeatus ◽  
Infected Fish ◽  
The Body ◽  
Filamentous Algae ◽  
Intermediate Hosts ◽  
Diplostomum Pseudospathaceum ◽  
The Difference ◽  
Trematode Infections ◽  
Macro Algae

Abstract Human-induced growth of macro-algae is often assumed to increase trematode infections in fishes by increasing the abundance and condition of the parasite’s intermediate host – snails – as this can boost the release of trematode larvae, cercariae, from the intermediate hosts. However, macro-algae can also impose barriers to the transmission of cercariae and reduce infections. We investigated whether an increased growth of filamentous algae affects the transmission of Diplostomum pseudospathaceum cercariae to the threespine stickleback Gasterosteus aculeatus, a common fish in eutrophied shallow waters. We exposed sticklebacks to trematode cercariae in the absence and presence of artificial filamentous algae, and recorded effects on the proportion of sticklebacks infected and the number of encysted metacercariae per fish. No significant effect of artificial algae on cercariae transmission was detected. However, the body size and the sex of the sticklebacks were strongly correlated with the number of encysted metacercariae per infected fish, with females and larger individuals being more infected. We discuss different factors that could have caused the difference in parasite transmission, including sex-related differences in body size and behaviour of sticklebacks.

Contributions of Lactobacillus plantarum PC170 administration on the recovery of gut microbiota after short-term ceftriaxone exposure in mice

2020 ◽  
Vol 11 (5) ◽  
pp. 489-509
Author(s):  
R. Cheng ◽  
H. Liang ◽  
Y. Zhang ◽  
J. Guo ◽  
Z. Miao ◽  
...  
Keyword(s):  
Body Weight ◽  
Gut Microbiota ◽  
Lactobacillus Plantarum ◽  
Antibiotic Treatment ◽  
Recovery Phase ◽  
The Body ◽  
Faecal Microbiota ◽  
Short Term ◽  
Host Animal ◽  
The Impact

This study aimed to determine the impact of Lactobacillus plantarum PC170 concurrent with antibiotic treatment and/or during the recovery phase after antibiotic treatment on the body weight, faecal bacterial composition, short-chain fatty acids (SCFAs) concentration, and splenic cytokine mRNA expression of mice. Orally administrated ceftriaxone quantitatively and significantly decreased body weight, faecal total bacteria, Akkermansia muciniphila, and Lactobacillus plantarum, and faecal SCFAs concentration. Ceftriaxone treatment also dramatically altered the faecal microbiota with an increased Chao1 index, decreased species diversities and Bacteroidetes, and more Firmicutes and Proteobacteria. After ceftriaxone intervention, these changes all gradually started to recover. However, faecal microbiota diversities were still totally different from control by significantly increased α- and β-diversities. Bacteroidetes all flourished and became dominant during the recovery process. However, mice treated with PC170 both in parallel with and after ceftriaxone treatment encouraged more Bacteroidetes, Verrucomicrobia, and Actinobacteria, and the diversity by which to make faecal microbiota was very much closer to control. Furthermore, the expression of splenic pro-inflammatory cytokine tumour necrosis factor-α mRNA in mice supplemented with PC170 during the recovery phase was significantly lower than natural recovery. These results indicated that antibiotics, such as ceftriaxone, even with short-term intervention, could dramatically damage the structure of gut microbiota and their abilities to produce SCFAs with loss of body weight. Although such damages could be partly recovered with the cessation of antibiotics, the implication of antibiotics to gut microbiota might remain even after antibiotic treatment. The selected strain PC170 might be a potential probiotic because of its contributions in helping the host animal to remodel or stabilise its gut microbiome and enhancing the anti-inflammatory response as protection from the side effects of antibiotic therapy when it was administered in parallel with and after antibiotic treatment.

scholarly journals Evidence for Freshwater Residualism in Coho Salmon, Oncorhynchus kisutch, From a Watershed on the North Coast of British Columbia

2017 ◽  
Vol 130 (4) ◽  
pp. 336 ◽  
Author(s):  
Eric A Parkinson ◽  
Chris J Perrin ◽  
Daniel Ramos-Espinoza ◽  
Eric B Taylor
Keyword(s):  
British Columbia ◽  
Fresh Water ◽  
Coho Salmon ◽  
Pacific Salmon ◽  
Oncorhynchus Kisutch ◽  
Water Levels ◽  
North Coast ◽  
The North ◽  
Seaward Migration ◽  
Mature Fish

The Coho Salmon, Oncorhynchus kisutch, is one of seven species of Pacific salmon and trout native to northeastern Pacific Ocean watersheds. The species is typically anadromous; adults reproduce in fresh water where juveniles reside for 1–2 years before seaward migration after which the majority of growth occurs in the ocean before maturation at 2–4 years old when adults return to fresh water to spawn. Here, we report maturation of Coho Salmon in two freshwater lakes on the north coast of British Columbia apparently without their being to sea. A total of 15 mature fish (11 males and four females) were collected in two lakes across two years. The mature fish were all at least 29 cm in total length and ranged in age from three to five years old. The occurrence of Coho Salmon that have matured in fresh water without first going to sea is exceedingly rare in their natural range, especially for females. Such mature Coho Salmon may represent residual and distinct breeding populations from those in adjacent streams. Alternatively, they may result from the ephemeral restriction in the opportunity to migrate seaward owing to low water levels in the spring when Coho Salmon typically migrate to sea after 1–2 years in fresh water. Regardless of their origin, the ability to mature in fresh water without seaward migration may represent important adaptive life history plasticity in response to variable environments.

Evidence for multiple paternity in two species of Orconectes crayfish

2014 ◽  
Vol 92 (11) ◽  
pp. 985-988 ◽  
Author(s):  
A.F. Kahrl ◽  
R.H. Laushman ◽  
A.J. Roles
Keyword(s):  
Genetic Variation ◽  
Life History ◽  
Multiple Mating ◽  
Natural Populations ◽  
Multiple Paternity ◽  
The Body ◽  
Freshwater Crayfish ◽  
Decapod Crustaceans ◽  
Freshwater Habitats ◽  
Crayfish Species

Multiple mating is expected to be common in organisms that produce large clutches as a mechanism by which sexual reproduction can enrich genetic variation. For freshwater crayfish, observation of multiple mating suggests the potential for high rates of multiple paternity, but genetic confirmation is largely lacking from natural populations. We studied paternity within wild-caught broods of two crayfish species in the genus Orconectes (Sanborn’s crayfish (Orconectes sanbornii (Faxon, 1884)) and the Allegheny crayfish (Orconectes obscurus (Hagen, 1870))). Although females have been observed mating with multiple males, this is the first genetic confirmation of multiple paternity in broods of these two species. Berried females were collected in the field and maintained in aquaria until their eggs hatched. We amplified and genotyped extracted DNA from maternal and hatchling tissue for several microsatellite loci. For both species, paternity reconstruction (GERUD 2.0) yielded 2–3 sires per brood and no single paternity clutches. We discuss these results from natural populations in light of the body of work on reproductive ecology of decapod crustaceans and in the context of changes in life history following the transition from marine to freshwater habitats.

scholarly journals Lalabet Financial Analysis: Study of Islamic Economics at Micro Level

2021 ◽  
Vol 4 (1) ◽  
pp. 233-244
Author(s):  
Ainorrofiqie Ainorrofiqie ◽  
Umrotul Khasanah ◽  
Akhmad Djalaluddin
Keyword(s):  
Financial Management ◽  
Financial Analysis ◽  
Financial Statements ◽  
The Body ◽  
Short Term ◽  
The Family ◽  
Micro Level ◽  
The Impact ◽  
The Village

This research aims to explore the model of financial management tradition Lalabet in the village of Babbalan District Batuan Sumenep. This study is based on the fact that occurred in the community about the implementation of traditions carried out by the heirs to family members who died. Interpretative qualitative research is used and an in-depth understanding of a problem that occurs is emphasized more. Based on the results of this study, the financial management tradition Lalabet can be done based on accounting equations. The accounts contained in the accounting equation is not used in its entirety and are reported as are generally financial statements. In this case, the source of funds in carrying out Lalabet tradition is sourced from personal money, money and donations from the family, money from Muslimat, debt, and money or goods from Lalabet's proceeds. The impact is the onset of debt both short-term and long-term. While the expenditure is in the form of costs in taking care of the body, costs for tahlilan (petto'arean), pa'polo, nyatos, nyataon, nyaebu, mangaji, ngin-tangin, nyalenin mayyid, and ajege makam (kep-sekep).

scholarly journals APPLICATION OF NANOTECHNOLOGY IN FOOD TECHNOLOGY AND TARGETED DRUG THERAPY FOR PREVENTION OF OBESITY: AN OVERVIEW

2016 ◽  
Vol 4 (1) ◽  
pp. 7 ◽  
Author(s):  
Jyotibala Banjare
Keyword(s):  
Drug Therapy ◽  
Medical Condition ◽  
Sleep Apnoea ◽  
The Body ◽  
Short Term ◽  
Major Health ◽  
Targeted Drug ◽  
Health Complications ◽  
New Generation ◽  
Oral Supplements

Obesity is a medical condition arises as a result of an imbalance between lipolysis and lipogenesis which leads to accumulation of excess fat. Obesity is linked with major health complications such as diabetes, cardiac disorder, cancer, hypertension, sleep apnoea, etc. Weight loss through medication and healthy food balance can prevent obesity and associated disorders. Though, diet based therapy and drugs have short term effect with lacunae. At present, no reliable and established oral supplements are available to take care of obesity. Nanotechnology is a briskly emerging area of science and technology for food modulation at molecular and atomic level. The unique size and superior properties of nanomaterial have huge application in biology and medicine for food and drug development. Nanotechnology is playing an important role in the food industry for unindustrialized improved food, uptake, absorption, and bioavailability of nutrients to the body. Balanced or better-modified nutrients food, restricted calorie measures and commercial availability is geared through Nanoscience for control of obesity. Nanoparticle Targeted drug therapy, particularly for adipose tissue, may provide a new generation formulation for therapeutics of obesity.

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