Abraar Karan Profile picture
May 19 7 tweets 4 min read Twitter logo Read on Twitter
1/ Tpoxx (Tecovirimat) resistance in immunocompromised patients, many of whom received multiple courses of treatment. Reminder- tpoxx is our first-line antiviral against monkeypox/mpox.

Important pre-print from CDC Monkeypox/mpox response team
medrxiv.org/content/10.110… Image
2/ Having worked on surveillance for a number of cases for the past several months, I think key is that many are patients also w/ tough social challenges which have made adherence to antiretroviral medications difficult, setting them up for a double-hit with AIDS + mpox @g0ingmad
3/ Health equity again is at the core of epidemic response. Over time, it is possible that we see circulation of these #mpox variants even in patients who have not been exposed to tecovirimat yet (more on this soon), esp if we see a resurgence this year. @gregggonsalves
4/ As the #mpox outbreak slowed down, media coverage labeled this as being 'over' but at health departments, we saw ongoing low-level transmission esp among our society's most vulnerable--> patients w/ homelessness, uncontrolled AIDS, psychiatric disease, etc
5/ These are patients who have been severely sick and/or died despite the availability of medications, including antiretrovirals for HIV/AIDS and antivirals (tpoxx,brin) + VIGIV for mpox being available. Our care systems failed them @JoiaMukherjee

nejm.org/doi/full/10.10…
6/ What happens when outbreaks 'end'? Who still suffers? We all do. We are deeply interconnected, esp when talking about transmissible infectious diseases. A virus with resistance to first-line treatments is a serious issue if/when there is wider spread.

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More from @AbraarKaran

Mar 16
1/ Phenomenal lecture today from Dr. Stephen Luby on his team's work discovering the mechanisms of #NipahVirus transmission in Bangladesh over nearly the past two decades

The story starts with an outbreak of fatal encephalitis among 11 patients (Dec 2004)
pubmed.ncbi.nlm.nih.gov/17326940/
2/ They asked the families of deceased cases about many exposures; & similarly asked the same to neighborhood controls

The evidence here pointed to consumption of raw date palm sap (odds ratio of 7.9)

Bats were suspected to drink from/near the clay pots of sap in the trees
3/ They used infrared cameras to help add to the evidence base, showing Pteropus bat behaviors at night related to consumption of the date palm sap where they presumably shed live virus. pubmed.ncbi.nlm.nih.gov/21207105/
Read 12 tweets
Mar 1
If we were hit with another covid-like pandemic soon, are we ready? As USG & (likely soon) WHO end the "emergency" phase of #Covid19, we need to avoid panic-neglect cycles. I think this is the bigger emergency. @bmj_latest

bmj.com/content/380/bm…
2/ As much as this is a matter of public health, it is also (perhaps more) a matter of politics. What will a Republican-led House focus on/fund for pandemic preparedness? And, w/ elections next year, to what extent will prevention efforts get pushed further down priority list?
3/ Furthermore, while we have excellent vaccines, more attention on high-quality masks, & some movement toward cleaner air, each of these areas is plagued by serious challenges in implementation.
Read 4 tweets
Feb 25
1/ It's difficult to see the pictures of severe #monkeypox infection in patients with uncontrolled HIV/AIDS in this Lancet case series. These patients are at high risk of death. These cases remind me of @NickKristof work on deaths of despair.

thelancet.com/action/showPdf…
2/ While these aren't the diseases that the term usually describes, the same social and economic despair underlies these infections as well. I have followed these cases in LA County as part of surveillance efforts for the past 6 months. Patients who were homeless, who had...
3/ significant mental health issues; substance abuse; relied on transactional sex for survival; and had other co-morbid sexually transmitted infections. These were patients who, because of these challenges, also were not consistently taking antiretroviral treatment for their HIV.
Read 4 tweets
Feb 4
This. In these mask RCTs, what’s rarely accounted for & hard to determine is when transmission happened. If it happens mostly when masks are off & that is happening way more than you account for in your analysis, you likely have significant misclassification of exposure bias.
2/ This doesn’t mean masks don’t work. What it might mean is that masks aren’t worn at all times they need to be in order for them to work. So pragmatically an intervention may need to increase compliance at specific high risk times when they are being removed.
3/ And when I use the word "work" here, it is really not a binary. The trial would be set up with an estimated effect size of the intervention. You are looking to detect that effect. That estimate is based on people complying with the intervention. But compliance is complex here
Read 9 tweets
Feb 3
1/ "We identified high loads of #monkeypox virus DNA by qPCR in 35 (85%) of 41 saliva samples. Infectious monkeypox virus was recovered from 22 (67%) of 33 saliva samples positive for monkeypox virus DNA."

Interesting study but transmission more complex

thelancet.com/journals/lanmi…
2/ Detection of viral DNA in various samples is not equal to transmission. We often say that culturable virus is a proxy for transmission potential, but even this doesn't mean transmission routes from those specimens are inherently effective ones.
3/ We saw this epidemiologically play out during the current #monkeypox outbreak. We did not see major spillover outside of MSM sexual networks. If there was substantial droplet transmission, transmission patterns would likely have looked different than they did.
Read 7 tweets
Jan 20
1/ Also, the move recently has been away from screening asymptomatic patients who are being admitted to the hospital. This will reduce burden on hospital/labs to process tons of samples, many which will be negative. It will miss some cases who are incubating + infectious
2/ I appreciate costs/benefits of this. On one hand, missed cases could transmit to staff who may be wearing surgical masks (still some protection but less than N95). For shared rooms, more concerning (see our paper) so would definitely screen prior

academic.oup.com/cid/article/74…
3/ In times of low community incidence, screening all asymptomatic may put strain on lab capacity for small benefit. If symptomatic or in shared rooms, would definitely advocate for testing in this scenario though as outlined above. Benefit of hospital is you can identify quickly
Read 4 tweets

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