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Allen Cheng

@peripatetical

Infectious diseases physician, epidemiologist. Melbourne, Australia.

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12.11.2024
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Latest posts by Allen Cheng @peripatetical

Congratulations to Steve Tong, Josh Davis and the huge SNAP team (including Monash Health). Clear outcome that cefazolin is less nephrotoxic than flucloxacillin for MSSA, and pencillin is better for PSSA. @steventong.bsky.social @gurujosh.bsky.social

13.04.2025 10:37 πŸ‘ 7 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Clade 2.3.4.4b H5N1 neuraminidase has a long stalk, which is in contrast to most highly pathogenic H5N1 viruses circulating between 2002 and 2020 | mBio While the truncated version of the N1 neuraminidase stalk domain may be associated with increased virulence in poultry, the long version of the stalk domain has been associated with increased transmis...

Cool paper from Florian Kramer & colleagues about a novel feature of circulating H5N1 clade 2.3.4.4. These viruses have a longer stalk in their neuraminidase (NA) enzyme, a key viral protein. This was not seen in past H5N1 strains (2002-2019)
Why does it matter?πŸ§ͺ
journals.asm.org/doi/10.1128/...

01.03.2025 12:40 πŸ‘ 157 πŸ” 54 πŸ’¬ 11 πŸ“Œ 4
Europe PMCHome - Europe PMC Europe PMC is an archive of life sciences journal literature.

Looks like PubMed is down - not sure if this is a temporary outage or something more sinister. Europe PMC is an alternative search engine for medical literature that is publicly accessible. europepmc.org

02.03.2025 10:45 πŸ‘ 6 πŸ” 2 πŸ’¬ 3 πŸ“Œ 1

Great list @absteward.bsky.social! Mine is coming soon (limited to 10)

12.12.2024 10:27 πŸ‘ 8 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

Paul Sax's "oh wow" moments in HIV: AZT during pregnancy reduces vertical transmission; triple ARVs improve survival; integrase inhibitors as effective salvage therapy; PrEP is very effective; undetectable = untransmissible and now 6 monthly lenacapravir PReP is 100% effective

12.12.2024 02:41 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Not my area of expertise, but I understand there are restrictions on the use of the Individual Healthcare Identifier so that it can't be used in linkage. But I could be wrong - others might know.

06.12.2024 04:39 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Interpunct - Wikipedia

Very annoying when you’re writing a manuscript - can’t easily find/replace to change full stops to interpuncts. I understand it’s a historical anachronism, like the New Yorker using diaereses (coΓΆperation”) en.m.wikipedia.org/wiki/Interpu...

03.12.2024 19:41 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China A recent cluster of pneumonia cases in Wuhan, China, was caused by a novel betacoronavirus, the 2019 novel coronavirus (2019-nCoV). We report the epidemiological, clinical, laboratory, and radiologica...

Five years ago (1 Dec 2019), the first person became unwell in a case cluster of a new infection that we now know as COVID-19. pmc.ncbi.nlm.nih.gov/articles/PMC...

01.12.2024 22:00 πŸ‘ 7 πŸ” 7 πŸ’¬ 1 πŸ“Œ 0

My father's family were originally rice farmers in China, and I ended up doing my PhD on melioidosis, a disease of rice farmers, partly based in Thailand where many of his siblings moved to (and where my cousin is an infectious diseases physician).

27.11.2024 00:38 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

C is the SchrΓΆdinger's result - simultaneously inferior and non-inferior.

26.11.2024 19:37 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I've been off social media mostly for almost three years, was enticed back by Tony Korman, and tentitively wading back in!

21.11.2024 02:33 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Supports routinely using 7 days of treatment in bacteraemia (other than S aureus, fungaemia, and if there is a definite indication for longer eg endocarditis)

21.11.2024 02:02 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

90 day mortality was *lower* in 7 day group (14.5%) vs 14 day group (16.1%); met non-inferiority criteria
There were no major differences between shorter/longer groups in subgroups, i8ncluding ICU, APACHE-II >25, by site or pathogen.

21.11.2024 02:02 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Broad variety of infection sites but majority gram neg (71%); clear separation in duration between shorter group (median 8 days) vs longer duration group (median 14 days)

21.11.2024 02:02 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

It included ICU patients (55% of enrolled patients) but notably excluded immunocompromised, S aureus, candida, deep infection (eg endocarditis).

21.11.2024 02:02 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

This was a large trial (n=3608) at 74 hospitals in 7 countries. (COI: The Australian arm was co-ordinated from Monash by Ben Rogers). It was a non inferiority, 7 vs 14 days of treatment; primary outcome 90 day mortality.

21.11.2024 02:02 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Antibiotic Treatment for 7 versus 14 Days in Patients with Bloodstream Infections | NEJM Bloodstream infections are associated with substantial morbidity and mortality. Early, appropriate antibiotic therapy is important, but the duration of treatment is uncertain. In a multicenter, non...

Congratulations to the BALANCE group on the trial published in NEJM today. This trial tested 7 vs 14 days of antibiotics for bloodstream infection. #IDSky www.nejm.org/doi/full/10....

21.11.2024 02:02 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Lessons from practice for immunocompromised hosts by Dr Ai Li Yeo and A/Prof Claire Dendle
#ForbesWeek #IDSky
1. There can be more than two pathologies in immunocompromised patients

15.11.2024 07:21 πŸ‘ 12 πŸ” 3 πŸ’¬ 1 πŸ“Œ 1

Thanks for coming to Melbourne! It's been an honour to have you join our ID community here and benefit from your expertise.

16.11.2024 00:09 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

28. In community-acquired infection, resistant organisms do not cause more severe illness than their sensitive counterparts. The only reason for using broader than usual therapy is when you (and the patient) cannot afford to be wrong.

16.11.2024 00:03 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

27. When you suspect bacteraemia, do not wait for the patient’s temperature to go up before doing blood cultures.

16.11.2024 00:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

26. In patients with unexplained neurological features, think of the five great infective mimics: HIV, syphilis, tuberculosis, Lyme disease (with epidemiological history), Whipple’s disease.

16.11.2024 00:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

25. Bacterial aortitis needs to be excluded in a patient who develops abdominal pain or back pain within weeks of an episode of diarrhoea.

16.11.2024 00:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

24. Remember that Listeria monocytogenes meningoencephalitis can masquerade clinically as herpes simplex encephalitis.

16.11.2024 00:03 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

23. Avoid the term β€œatypical pneumonia” in children, adults over the age of 50 years, the immunocompromised, the severely ill, or patients with diffuse bilateral interstitial pulmonary infiltrates.

16.11.2024 00:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

22. Not everyone with aseptic meningitis has viral meningitis; unless confirmed by PCR, viral meningitis is a diagnosis made after the patient has recovered.

16.11.2024 00:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

21. Specific IgM antibodies are a useful but unreliable marker of primary infections in pregnancy, thus clinical decisions should not be based solely on a positive IgM.

16.11.2024 00:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

20. Consider common bacterial infections, and not just opportunistic infections in febrile patients with HIV.

16.11.2024 00:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

19. Think of vertebral osteomyelitis and epidural abscess in a patient with fever and back pain.

16.11.2024 00:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

18. Infection in the diabetic patient will flourish until the diabetes is controlled.

16.11.2024 00:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0